Philips Automobile 3905 User Manual

MODEL 3905

owners manual

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Before You Proceed

Traxxas

1100 Klein Road

Plano, Texas 75074

Phone: 972-265-8000

Toll-free 1-888-TRAXXAS

Carefully read and follow all instructions in this and any

accompanying materials to prevent serious damage to your

model. Failure to follow these instructions will be considered

abuse and/or neglect.

Support

If you have any questions about your model or its operation,

call the Traxxas Technical Support line toll-free at:

1-888-TRAXXAS (1-888-872-9927)*

Before running your model, look over this entire manual and

examine the model carefully. If for some reason you decide it is not

what you wanted, then do not continue any further. Your hobby

dealer absolutely cannot accept a model for return or exchange

after it has been run.

Technical support is available Monday through Friday from 8:30am

to 9:00pm central time. Technical assistance is also available at

www.Traxxas.com. You may also e-mail customer support with your

question at [email protected]. Join thousands of registered

members in our online community at Traxxas.com.

Traxxas U.K.

P.O. Box 1128

Winterbourne, Bristol

BS36-2SH

England

Phone: 44-117-956-1002

Traxxas offers a full-service, on-site repair facility to handle any

of your Traxxas service needs. Maintenance and replacement

parts may be purchased directly from Traxxas by phone or online

at www.BuyTraxxas.com. You can save time, along with shipping

and handling costs, by purchasing replacement parts from your

local dealer.

Warnings, helpful hints, & cross-references

Throughout this manual, you’ll notice warnings and helpful hints

identiﬁed by the icons below. Be sure to read them!

Internet

www.Traxxas.com

E-mail: [email protected]

Traxxas, Ready-To-Race, Ready-

To-Win, E-Maxx and ProGraphix

are trademarks or registered

trademarks of Traxxas. Other

brand names and marks are

the property of their respective

holders and are used only for

purposes of identiﬁcation. No

part of this manual may be

An important warning about personal safety or avoiding

damage to your model and related components.

Do not hesitate to contact us with any of your product support needs.

We want you to be thoroughly satisﬁed with your new model!

Special advice from Traxxas to make things easier

and more fun.

Refers you to a page with a related topic.

reproduced or distributed in print

or electronic media without the

express written permission of

Traxxas. Speciﬁcations are subject

to change without notice.

E-Maxx

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*Toll-free support is available to U.S. residents only.

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Safety Precautions

All of us at Traxxas want you to safely enjoy your new model.

Operate your model sensibly and with care, and it will be exciting,

safe, and fun for you and those around you. Failure to operate your

model in a safe and responsible manner may result in property

damage and serious injury. The precautions outlined in this manual

should be strictly followed to help ensure safe operation. You alone

must see that the instructions are followed and the precautions are

adhered to.

Do not use battery packs that have damaged wiring, exposed

wiring, or a damaged connector.

Children should have responsible adult supervision when

charging and handling batteries.

All instructions and

precautions outlined in this

manual should be strictly

followed to ensure safe

operation of your model.

Speed Control

Disconnect the Batteries: Always disconnect the batteries from the

speed control when not in use.

Transmitter on First: Switch on your transmitter ﬁrst before

switching on the speed control to prevent runaways and

erratic performance.

Don’t Get Burned: The heat sink can get extremely hot, so be

careful not to touch it until it is cool. Supply adequate airﬂow

for cooling.

Use Stock Connectors: If you decide to change the battery

or motor connectors, only change one battery or motor connector

at a time. This will prevent damage from accidentally mis-wiring

the speed control. Please note that modiﬁed speed controls can

be subject to a rewiring fee when returned for service. Removing

the battery connector on the speed control or using connectors

with no reverse-polarity protection on the speed control will void

the product’s warranty.

Insulate the Wires: Always insulate exposed or damaged wiring

with heat shrink tubing to prevent short circuits

Always Use Heat Sinks: Three heat sinks are factory-installed on

the speed control and must be used for maximum cooling and

performance.

No Reverse Voltage: The speed control is not protected against

reverse polarity voltage. When changing the battery and/or

motor, be sure to install the same type of connectors to avoid

reverse polarity damage to the speed control. Removing the

battery connectors on the speed control or using the same-gender

connectors on the speed control will void the product’s warranty.

Do Not Let the Transistor Tabs Touch: Never allow the three

separate transistor banks to touch each other or any exposed

metal. This will create a short circuit and damage the speed

control. (For example, laying a metal tool across the heat sinks can

damage the speed control.)

This model is not intended

for use by children under

8 years of age without the

supervision of a responsible

and knowledgeable adult.

Important Points to Remember

Your model is not intended for use on public roads or congested

areas where its operation can conﬂict with or disrupt pedestrian

or vehicular trafﬁc.

Never, under any circumstances, operate the model in crowds of

people. Your model is very fast and could cause injury if allowed

to collide with anyone.

Because your model is controlled by radio, it is subject to radio

interference from many sources that are beyond your control.

Since radio interference can cause momentary losses of radio

control, always allow a safety margin in all directions around the

model in order to prevent collisions.

The motors, batteries, and speed control can become hot during

use. Be careful to avoid getting burned.

Don’t operate your model at night, or anytime your line of sight

to the model may be obstructed or impaired in any way.

Most importantly, use good common sense at all times.

Previous experience with

radio controlled models

is recommended. Models

require a higher level of

setup, maintenance, or

support equipment.

Batteries and Battery Charging

Your model uses rechargeable batteries that must be handled with

care for safety and long battery life. Make sure to read and follow all

instructions and precautions that were provided with your battery

packs and your charger. It is your responsibility to charge and care

for your battery backs properly. In addition to your battery and

charger instructions, here are some more tips to keep in mind.

Never leave batteries to charge unattended.

Remove the batteries from the model while charging.

Always unplug the batteries from the electronic speed control

when the model is not in use and when it is being stored

or transported.

No Schottky Diodes: External Schottky diodes are not compatible

with reversing speed controls. Using a Schottky diode with the

EVX-2 will damage the ESC and void the 30-day warranty.

Allow the battery packs to cool off between runs

(before charging).

Do not use battery packs that have been damaged in any way.

4 E-Maxx

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Tools, Supplies and Required Equipment

Your model comes with a set of specialty metric tools. You’ll need to purchase other items, available from your hobby dealer, to operate

and maintain your model.

For more information on

batteries, see Use the Right

Batteries on page 10.

Supplied Tools and Equipment

A peak-detecting charger

is recommended for best

performance and longest

battery life. For more

information, see Use the

Right Charger on page 12.

2.0mm “T” wrench

1.5mm “L” wrench

2.5mm “L” wrench

8mm/5mm wrench

Universal wrench

Recommended Equipment

These items are not required

for the operation of your

model, but are a good idea to

include in any R/C toolbox:

• Safety glasses

Pre-load spacers and shock pistons

Foam blocks (battery spacers)

Body clips

Suspension multi-tool

Antenna nut wrench

(on parts tree) see page 20

see page 12

• Thin, hobby-quality

cyanoacrylate instant tire

glue (CA glue)

• Hobby knife

• Side cutters and/or needle

nose pliers

Required Tools and Equipment

(sold separately)

• Philips screwdriver

• Soldering iron

8 AA alkaline

batteries

Two NiMH battery packs (7.2V 6-cell

or 8.4-volt 7-cell [recommended])

NiMH battery charger

(peak detecting type recommended - see sidebar)

Warning: Lithium Polymer (LiPo) batteries should not be used with the EVX-2. The EVX-2 electronic speed control is not equipped with low-voltage detection.

E-Maxx

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Anatomy of the E-Maxx

Half Shaft

Steering Servo

Hex Hub

Pivot Ball

Slipper Clutch Access Plug

Pinion Gear (left side)

Battery Hold-Down

Toe Link

(Turnbuckle)

Axle Carrier

Electronic Speed

Control (EVX-2)

Battery Compartment

Motors (Titan)

Toe Link

(Turnbuckle)

Suspension

Arm (Front)

Rear

Body Mount

Front Body

Mount

Rear

Shock Tower

Receiver

Box

Skid Plate

Front

Bumper

Rear

Bumper

Front

Differential

Rear

Bulkhead

Transmission

Chassis

Front

Spur Gear

Bulkhead

Rear

Differential

Battery Compartment

Front

Shock Tower

Antenna Mount

Suspension

Arm (Rear)

Battery Hold-Down

Ultra Shock^™

(Oil Damper)

Steering Servo

Traxxas

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Quick Start: Getting up to Speed

The following guide is an overview of the procedures for getting your model running. Look for the Quick Start logo on the bottom

corners of Quick Start pages.

The Quick Start Guide is

not intended to replace the

full operating instructions

available in this manual.

Please read this entire

manual for complete

instructions on the proper

use and maintenance of

your model.

1. Read the safety precautions on page 4

9. Detail your model • See page 8

For your own safety, understand where carelessness and misuse

could lead to personal injury.

Apply other decals if desired.

2. Charge the battery packs • See sidebar, page 12

10. Drive your model • See page 17

Fullychargetwo7.2or8.4-voltbatterypacks(notincluded).Chargeyour

batteries now so it will be ready when you finish the other setup procedures.

Driving tips and adjustments for your model.

3. Install the antenna • See page 11

11. Maintaining your model • See page 25

Install the antenna mast in the model.

Follow these critical steps to maintain the performance

of your model and keep it in excellent running condition.

4. Install batteries in the transmitter • See page 11

The transmitter requires 8 AA alkaline or rechargeable batteries.

5. Install battery packs in the model • See page 12

Your model requires two fully charged 7.2 or 8.4-volt battery packs

(not included).

6. Turn on the radio system • See page 14

Make a habit of turning the transmitter on ﬁrst, and off last.

7. Check servo operation • See page 14

Make sure the steering servos are working correctly.

Look for the Quick Start

logo at the bottom of

Quick Start pages.

8. Range test the radio system • See page 14

Follow this procedure to make sure your radio system works properly

at a distance and that there is no interference from outside sources.

E-Maxx

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Decorating your Model

Applying The Decals

The main decals for your model

have been applied at the factory.

The decals are printed on self-

adhesive clear mylar and are

die-cut for easy removal. Use a

hobby knife to lift the corner of a

decal and lift it from the backing.

To apply the decals, place one end

down, hold the other end up, and

gradually smooth the decal down

with your ﬁnger as you go. This will

prevent air bubbles. Placing both

ends of the decal down and then

trying to smooth it out will result in

air pockets.

Tire Gluing

The factory tires on your E-Maxx are already glued to the rims. The

tires must be glued to the rims to prevent the rims from spinning

inside the tires. The instructions here are provided to show you how

to glue replacement tires to the rims in the future. Use CA tire glue

available from your local hobby dealer. You can glue the tires without

removing the wheels from the truck. For clarity, these instructions

show the process with the wheels removed.

1. Remove a wheel from E-Maxx using the larger (8mm) end of the

universal wrench.

2. Use your thumb to push the side

of the tire away from the rim. Place

one or two drops of CA glue into

the opening and release the tire.

Capillary action will draw the glue

around the bead of the tire.

Look at the photos on the box for

typical decal placement.

3. Repeat step two at four or five

points around the rim, until the tire is completely secured to the rim.

Turn the rim over and repeat the process for the inside of the rim/

tire. Repeat for the other three wheels.

4. Reinstall the wheels, make sure none of the axle pins have fallen out

from behind the hex hubs.

8 E-Maxx

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The Traxxas TQ Radio System

Your model is equipped with the Traxxas TQ Radio System.

Wiring Diagram

EVX-2 Wiring Diagram

Channel 1

Steering Servos

The Traxxas TQ Radio System is a 2-channel system that provides

high-power output up to a quarter mile. Model 3905 uses two steering

servos and an electronic speed control. The receiver is equipped with

four channels and dual channel 1 outputs for the steering servos.

Antenna

TQ Transmitter

Motors

(Titan^®)

Crystal

Throttle Neutral Adjust

Antenna

Receiver

Steering Wheel

Throttle Trim

Steering Trim

High-Current

Connector

TERPROOF

BATT/CH4 and CH3 are not used

Channel 2

EVX-2 Electronic

Speed Control

EVX-2 Electronic Speed Control

To Motor

Throttle

Trigger

High-Current

Battery Connector

Servo Reversing

Switch

TERPROOF

Heat Sinks

Power Indicator

Power Switch

Battery Compartment

LED

EZ-Set Button

E-Maxx

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The Traxxas TQ Radio System

mAh – Abbreviation for milliamp hour. A measure of the capacity of

the battery pack. The higher the number, the longer the battery

will last between recharges.

Radio System Terminology

Please take a moment to familiarize yourself with these radio-

system terms. They will be used throughout this manual.

Use the Right Batteries

Your transmitter uses AA

batteries. Use new alkaline

batteries, or rechargeable

batteries such as NiCad

or NiMH (Nickel Metal

Hydride) batteries in your

transmitter. Make sure

rechargeable batteries are

fully charged according

to the manufacturer’s

instructions.

Neutral position - The standing position that the servos seek when

the transmitter controls are at the neutral setting.

BEC (Battery Eliminator Circuit) - The BEC can either be in the

receiver or in the ESC. This circuit allows the receiver and servos

to be powered by the main battery pack in an electric model. This

eliminates the need to carry a separate pack of 4 AA batteries to

power the radio equipment.

NiCad - Abbreviation for nickel-cadmium. The original rechargeable

hobby pack, NiCad batteries have very high current handling,

high capacity, and can last up to 1000 charging cycles. Good

charging procedures are required to reduce the possibility of

developing a “memory” effect and shortened run times.

Channel - The 27 MHz frequency band is divided into 6 channels

so that up to six models can be operated simultaneously. Each

channel is referred to by its ﬂag color and channel number, as

shown below.

NiMH - Abbreviation for nickel-metal hydride. Rechargeable NiMH

batteries offer high current handling, and much greater resistance

to the “memory” effect. NiMH batteries generally allow higher

capacity than NiCad batteries. They can last up to 500 charge

cycles. A peak charger designed for NiMH batteries is required for

optimal performance.

Frequency

Band

Flag

Color

Traxxas

Part No.

Channel

If you use rechargeable

batteries in your

26.995

27.045

27.095

27.145

27.195

27.255

Brown

2031

2032

2033

2034

2035

2036

transmitter, be aware

that when they begin

to lose their charge, they

lose power more quickly

than regular alkaline

batteries.

Red

Receiver - The radio unit inside your model that receives signals

from the transmitter and relays them to the servos.

Orange

Yellow

Green

Blue

Servo - Small motor unit in your model that operates the steering

mechanism.

Transmitter - The hand-held radio unit that sends throttle and

steering instructions to your model.

Caution: Discontinue

running your model at the

ﬁrst sign of weak batteries

(ﬂashing red light) to avoid

losing control.

Trim - The ﬁne-tuning adjustment of the neutral position of the

servos, made by adjusting the throttle and steering trim sliders on

the face of the transmitter.

Clearing your frequency - A routine, verbal check to make sure

nobody else in your area is operating on the same channel.

Always clear your frequency by calling out your channel number

before operating your model. Wait or move to another area if your

channel is already being used.

Thermal Shutdown Protection - Temperature sensing electronics

are used in the ESC to detect overloading and overheating of the

transistor circuitry. If excessive temperature is detected, the unit

automatically shuts down to prevent damage to the electronics.

Crystal (X-tal) - The plug-in device that determines which channel

the radio system will operate on. For each channel, there are two

crystals, one for the receiver and one for the transmitter. Of those

two crystals, the one marked with the lower number (.455 MHz

lower) must be inserted into the receiver.

2-channel radio system - The TQ radio system, consisting of

the receiver, the transmitter, and the servos. The system uses

two channels: one to operate the throttle and one to operate

the steering.

ESC (Electronic Speed Control) - An electronic speed control is

the electronic motor control inside the model. The EVX-2 uses

MOSFET power transistors to provide precise, digital proportional

throttle control. Electronic speed controls use power more

efﬁciently than mechanical speed controls so that the batteries

run longer. An electronic speed control also has circuitry that

prevents loss of steering and throttle control as the batteries lose

their charge.

550 and 540 - These numbers refer to the size of the motor. 550

motors have armatures that are 30% longer than 540 motors.

Frequency band - The radio frequency used by the transmitter to

send signals to your model. All Traxxas RTR models operate on a

27 MHz frequency band.

10 E-Maxx

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The Traxxas TQ Radio System

Installing Transmitter Batteries

Your TQ transmitter uses 8 AA batteries (see sidebar, page 10).

The battery compartment is located in the base of the transmitter.

Setting up the Antenna

1. Locate the black antenna wire that

exits the receiver box.

If the power indicator

doesn’t light red, check the

polarity of the batteries.

Check rechargeable

Antenna

Tip

2. Pull the wire straight with your

ﬁngers and then insert the end

of the wire into one end of the

antenna tube (the antenna tube,

tip, crimp nut and sleeve are

located in the documents bag).

Push the wire all the way through

the antenna tube.

Antenna

Sleeve

batteries for a full charge.

Spray a little window cleaner

on the antenna wire to make

it easier to push through the

antenna tube.

3. Insert the base of the tube into

the antenna post. Take care not to

crimp the antenna wire.

If there are any kinks in the

black antenna wire, it will

be more difﬁcult to push

through the antenna tube.

Pull the wire straight by

sandwiching it between your

thumb and index ﬁnger and

running your ﬁngers along

the length of the wire (with

medium pressure).

Antenna

Tube

4. Slide the crimp nut over the

antenna tube and screw it onto

the antenna post. Use the supplied

tool to tighten the crimp nut on

the post just until the antenna

tube is securely in place. Do not

over tighten or crush the antenna

wire against the chassis.

1. Remove the battery compartment door by pressing the tab and

lifting the door up.

2. Install the batteries in the correct orientation as indicated in the

battery compartment.

3. Reinstall the battery door and snap it closed.

4. Turn on the transmitter and check the power indicator for a solid

red light.

5. Fold the top of the antenna wire

over the top of the antenna tube.

Slide the antenna sleeve over the

tube to retain the antenna wire.

Now slide the antenna tip onto the

top of the antenna tube. Never cut

or shorten the antenna wire.

Don’t shorten the length of

the antenna wire. Its length

is tuned to the frequency

band; cutting it could

severely shorten the radio

system’s range.

Antenna

Wrench

If the power indicator light ﬂashes, then the transmitter batteries

are weak, discharged or possibly installed incorrectly. Replace with

new or freshly charged batteries. The power indicator light does not

indicate the charge level of the battery pack installed in the model.

6. On the transmitter, always fully

extend the telescoping antenna

when running your model. Make a

habit of holding the transmitter so

the antenna points straight up.

See page 19 for more

information about the

receiver box and maintaining

a watertight seal.

CH.

Antenna

Crimp Nut

Antenna

Post

E-Maxx 11

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The Traxxas TQ Radio System

Battery Installation

Installing Battery Packs

1. Remove the battery hold-

down by pressing on the

release tab and lifting out

the hold-down.

The E-Maxx requires two fully charged 7.2 or 8.4-volt (stick style)

NiMH battery packs. These batteries are not included with the

model. For the best performance, use 7-cell battery packs. When

using 6-cell battery packs, install the supplied foam block (spacer)

into the front of the battery compartment. The spacers are located

in your instructions package. The spacers are shaped to conform

to the chassis. There is a right and a left. Test ﬁt them to conﬁrm

their location. Remove the backing from the self adhesive strips and

secure them to the front of the battery compartments.

Use the Right Charger

The most convenient type

of charger is an AC peak-

detecting charger that plugs

directly into an AC wall

outlet. It contains special

peak-detection circuitry

that automatically shuts the

charger off when the battery

is fully charged.

2. Install the battery pack with

the battery wires facing

the rear of the model. Your

model includes foam blocks

which should be installed

behind 6-cell batteries for a

more secure fit.

Foam

Block

Using Different Battery Conﬁgurations

If you’re using a 15-minute

timed charger, always fully

discharge the battery pack

before each charge. Some

high mAh battery packs

(1500 mAh or higher) require

more than the standard 15

minutes of charge time. If

the battery pack is cold after

15 minutes of charging,

add another 5 minutes of

charge time. Closely monitor

the battery pack and stop

charging it when it begins

to feel warm to the touch.

Never leave a battery

The battery hold-downs are

capable of accommodating

3. Insert the tabs of the battery

hold-down into the slots in

the rear hold-down retainer

(A). Swing the battery hold

down towards the chassis

“25” - Standard stick packs

either side-by-side racing

style packs or the more

common stick packs. The

battery compartments

are conﬁgured for stick

packs from the factory.

The number on each

side of the hold down

indicates the battery

Release Tab

6-cell Battery Install

7-cell Battery Install

and snap (lock) the end into the front hold-down retainer (B).

The Traxxas High Current Connector

Your model is equipped with the Traxxas

High-Current Connector. Standard connectors

restrict current ﬂow and are not capable of

delivering the power needed to maximize the

output of the EVX-2. The Traxxas connector’s

gold-plated terminals with a large contact surfaces ensure positive

current ﬂow with the least amount of resistance. Secure, long-

lasting, and easy to grip, the Traxxas connector is engineered to

extract all the power your battery has to give.

height in millimeters

that hold-down can

“23” - Side-by-side packs

accommodate. Note that one side is labeled “25” and other side is

labeled “23”. The 25mm side is for use with typical stick type battery

packs. If you are using side-by-side racing packs, simply flip the hold-

down over to the 23mm side and use it on the opposite side of the

chassis. Accessory hold downs and foam (part #3927X) are available to

accommodate larger battery packs. See the 3905 E-Maxx parts list for

more information.

charging unattended.

Always follow charger

manufacturer’s instructions.

Warning: Lithium Polymer

(LiPo) batteries should not

be used with the EVX-2. The

EVX-2 is not equipped with

low-voltage detection.

To run this model, your batteries must be equipped with Traxxas

High-Current Connectors. Batteries can either be purchased new

with Traxxas connectors installed or Traxxas connectors can be

purchased to install on battery packs you already own. See sidebar

on page 13 for packages available from your hobby dealer.

25mm side: Standard

NiMH stick pack setup

The typical Molex style connector is inadequate for

use in your model. It creates resistance that becomes

a bottleneck to current ﬂow. If your battery pack

is equipped with a Molex connector, it must be

23mm side: Side-by-side

NiMH pack setup

replaced with a Traxxas High-Current Connector to

Molex

connector

mate with the EVX-2 electronic speed control.

12 E-Maxx

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The Traxxas TQ Radio System

TQ Radio System Controls

There are two settings available:

50/50: Allows equal travel for both

acceleration and reverse.

70/30: Allows more throttle travel (70%)

and less reverse travel (30%).

Steering

Don’t push the transmitter

antenna down from the

top. Pull it down from the

bottom, one segment at a

time, to prevent binding and

kinking the antenna mast.

Note: If you change throttle travel, you

will need to reprogram the electronic

speed control.

The following Traxxas High

Current Connector packages

are available from your

hobby dealer. When using

adapters, be careful not to

exceed the current rating of

the Molex connector.

Electronic Throttle Trim

The electronic throttle trim located on the face of the transmitter

adjusts the neutral (center) point of the electronic speed control.

This control has been preset for you at the factory.

Brake/Reverse

Electronic Steering Trim

The electronic steering trim located on the face of the transmitter

adjusts the neutral (center) point of the steering servos when the

servos are at rest. Adjust this control to make the model drive

straight with no steering input at the wheel.

Neutral

Part #3060

Part #3080

Single Male/Female

2-Pack Female

Servo Reversing Switches

The servo reversing switches are located on the front of the

transmitter, next to the on/off switch. Moving a switch reverses

the direction of the corresponding servo.

Accelerate

Part #3061

Male Charge Adapter

Part #3070

2-Pack Male

Each switch corresponds to a channel, as shown below. For

example, if you turn the steering wheel to the right and your

wheels turn left, you would move the Channel 1 switch to

correct the servo direction. It may be necessary to adjust the

corresponding trim control after moving a switch.

Part #3062

Female Charge Adapter

TQ Radio System Adjustments

In addition to the electronic throttle and steering trim controls,

your radio system features throttle neutral adjustment and servo

reversing switches. These are preset at the factory and should

not require further adjustment.

Channel Servo

Steering

Throttle Neutral Adjustment

The throttle neutral adjustment is located on the transmitter face

and controls the forward/reverse travel of the throttle trigger.

Change the adjustment by pressing the button and sliding it to

the desired position.

Throttle

Default Setting

E-Maxx 13

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The Traxxas TQ Radio System

TQ Radio System Rules

Each time you prepare to run your model, you

must clear your frequency to be sure no one

else in the area is using the same channel as

you. There are six possible channels, numbered

1 through 6. Each is represented by a color.

Look at the crystal plugged into the back of

your transmitter to determine which channel

your model is assigned to.

Channel 1

Brown

4. The on/off switch is integrated into the speed control. With

the transmitter on, press the EVX-2 set button for ½ second, until

the LED shines GREEN, then immediately release the button. This

turns the model on (see page 15 for more on EVX-2 setup and

operation). To turn the EVX-2 off, press the set button until the

green LED turns off. Always disconnect your batteries when the

model is not in use.

Remember, always turn the

TQ transmitter on ﬁrst and

off last to avoid damage to

your model.

Channel 2

Red

Channel 3

Orange

Channel 4

Yellow

Channel 5

Green

Your speed control was

adjusted to the radio from

the factory. It is possible

for the throttle trim control

on the transmitter to have

moved during transit

or while handling the

transmitter. If the motors

run when the model is

5. Turn the steering wheel on the transmitter back and forth and

check for rapid operation of the steering servos. Also, check that

the steering mechanism is not loose or binding. If the steering

operates slowly, check for weak batteries.

Channel 6

Blue

Always turn your TQ transmitter on ﬁrst and off

last. This procedure will help to prevent your model

from receiving stray signals from another transmitter,

or other source, and running out of control.

6. When looking down at model, the front wheels should be

pointing straight ahead. If the wheels are turned slightly to

the left or right, slowly adjust the steering trim control on the

transmitter until they are pointing straight ahead.

Always have the transmitter turned on before plug in

the battery.

Always use new or freshly charged batteries for the radio

system. Weak batteries will limit the range of the radio signal

between the receiver and the transmitter. Loss of the radio

signal can cause you to lose control of your model.

switched on, then move the

throttle trim control on the

transmitter until the motors

stop. If anything more

7. Operate the throttle trigger to ensure that you have full forward

and reverse operation, and that the motors stop when the

throttle trigger is at neutral.

than a slight adjustment of

the throttle trim control is

required, then you should

readjust your speed control.

Refer to the adjustments

section on page 15.

8. Once adjustments are made, turn off your model, followed by

the hand held transmitter.

Range-Testing the TQ Radio System

Before each running session with your model, you should range-

test your radio system to ensure that it operates properly.

1. Turn on the radio system and check its operation as described

in the previous section.

Always turn your

Turn on the model.

When rechargeable batteries

begin to lose their charge,

they will fade much faster

than alkaline dry cells. Stop

immediately at the ﬁrst sign

of weak batteries. Never turn

the transmitter off when the

battery pack is plugged

in. The model could run out

of control.

Plug in the battery.

see TQ Radio System Setup, step 4.

transmitter on ﬁrst.

2. Have a friend hold the model. Make sure hands and clothing are

clear of the wheels and other moving parts on the model.

TQ Radio System Setup

3. Make sure your transmitter antenna is fully extended, and then

walk away from the model with the transmitter until you reach

the farthest distance you plan to operate the model.

The TQ Radio System was pre-adjusted at the factory. The

adjustment should be checked, before running the model,

in case of movement during shipping. Here’s how:

1. Fully extend the chrome antenna mast on the transmitter and

turn the switch on. The red indicator light on the transmitter

should be solid red (not ﬂashing).

4. Operate the controls on the transmitter once again to be sure

that the model responds correctly.

5. Do not attempt to operate the model if there is any problem

with the radio system or any external interference with your

radio signal at your location.

2. Elevate the model so that all four tires are off the ground.

If you are holding the model, grip it ﬁrmly. Make sure your

hands are clear of the moving parts of the model.

3. Plug the battery pack in the model into the speed control.

14 E-Maxx

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Adjusting the Electronic Speed Control

The EVX-2 electronic speed control is factory set and should not require

any adjustments. These instructions are provided for your reference.

6. When the LED blinks RED TWICE. Push the

throttle trigger to the full reverse and hold it

there (C).

EVX-2 Speciﬁcations

Input voltage:

6 to 14-cells

(7.2 to 16.8 volts DC)

Transmitter Adjustments for the EVX-2 ESC

Before attempting to program your EVX-2, it is important to make

sure your TQ transmitter is properly adjusted (set back to the factory

defaults). Otherwise, you may not get the best performance from your

speed control.

7. When the LED turns solid GREEN, programming is

complete. The LED will continuously shine green

indicating the EVX-2 is on and at neutral (D).

Solid Green

Motor limit:

12-turns (550)

Continuous current:

30A

EVX-2 Operation

The transmitter should be adjusted as follows:

To operate the speed control and test the programming, place the

vehicle on a stable block or stand so all of the driven wheels are off the

ground. Reconnect the motor wires. Always make sure that objects and

ﬁngers are clear of the wheels.

1. Set the throttle neutral switch to the 50/50 setting. This adjusts

the transmitter’s throttle trigger throw to 50% for throttle and

50% for braking and reverse.

Peak current :

180A

BEC voltage:

6.0V DC

2. Set the throttle trim control to the middle “0” setting.

1. With the transmitter on, press the EZ-Set button for ½ second,

until the LED shines GREEN, then immediately release the button.

This turns on the EVX-2. If you press and release too quickly, you

may hear the steering servos jump but the LED may not stay

on. (Note: If the throttle is not at neutral or if the throttle trim

has been altered, the LED will turn off after one second and the

wheels may begin to drive.)

Transistor type:

MOSFET

3. Set the Channel 2 servo reversing switch to the left position. Do

not change the position of any of the servo reversing switches

after programming the EVX-2.

Motor/Battery Wiring:

14-gauge

Protection:

Thermal shutdown

4. You are now ready to program your speed control.

Setup Programming (Calibrating your ESC and transmitter)

Read through all of the following programming steps before you

begin. If you get lost during programming or receive unexpected

results, simply unplug the battery, wait a few seconds, plug the battery

back in, and start over.

EVX-2 Wiring Diagram

2. Apply forward throttle. The LED will turn off until full throttle

power is reached. At full throttle, the led will shine GREEN.

3. Move the trigger forward to apply the brakes. Note that braking

control is fully proportional. The LED will turn off until full braking

power is reached. At full brakes, the LED will shine GREEN.

1. Disconnect each of the motor wires between

the EVX-2 and the motors. This is a precaution

to prevent runaway when the speed control is

turned on before it is programmed.

4. Return the throttle trigger to neutral. The LED will shine GREEN.

5. Move the throttle trigger forward again to engage reverse

(Proﬁle #1). The LED will turn off. Once full reverse power is

reached, the LED will shine GREEN.

2. Connect two fully charged battery packs to the

Green then Red

EVX-2.

6. To stop, return the throttle trigger to neutral. Note that there is

no programmed delay when changing from reverse to forward.

Use caution to avoid slamming the speed control from reverse

to forward. On high-traction surfaces, this could result in

transmission or driveline damage.

3. Turn on the transmitter (with

the throttle at neutral).

4. Press and hold the EZ-Set

button (A). The LED will ﬁrst

turn green and then red.

Once Red

7. To turn the EVX-2 off, press the EZ-Set button until the green LED

turns off.

Release the EZ-Set button.

5. When the LED blinks RED ONCE.

Pull the throttle trigger to the

full throttle position and hold it

there (B).

Twice Red

E-Maxx 15

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Adjusting the Electronic Speed Control

Thermal Shutdown Protection

Selecting Race Mode (Proﬁle #2)

1. Connect two fully charged battery

packs to the EVX-2 and turn on your

transmitter.

The EVX-2 is equipped with thermal shutdown protection to guard

against overheating caused by excessive current ﬂow. If the operating

temperature exceeds safe limits, the EVX-2 will automatically shut

down and the EVX-2 LED will ﬂash red. The LED on the face of the EVX-

2 will continuously ﬂash red, even if the throttle trigger is moved back

and forth. After the speed control cools down to a safe level,

the LED will continuously shine green. The EVX-2 will once again

function normally.

Patent Pending Training

Mode (Proﬁle #3) reduces

forward and reverse throttle

by 50%. Training Mode

2. With the EVX-2 off, press and hold

the EZ-Set button until the light

turns solid green, then solid red and

then begins blinking red (indicating

the Proﬁle numbers).

is provided to reduce the

power output allowing

Green to Red to Off

Two blinks Red

beginning drivers to better

control the model. As driving

skills improve, simply change

to Sport or Race Mode for

full-power operation.

3. When the light blinks red twice,

release the EZ-Set button.

EVX-2 Proﬁle Selection

Release

Solid Green

The speed control is factory set to Proﬁle #1. To change the proﬁle,

follow the steps on described below. The speed control should be

connected to the receiver and battery, and the transmitter should be

adjusted as described previously. The proﬁles are selected by entering

the programming mode.

4. The light will then turn green and the model is ready to drive.

Tip For Fast Mode Changes

The EVX-2 is set to Proﬁle 1

(Sport Mode) as the default.

To quickly change to Proﬁle 3

(Training Mode), with the

transmitter on, press and hold

the SET button until the light

blinks red three times and then

release. For full power, quickly

change back to Proﬁle 1 (Sport

Mode) by pressing and

Selecting Training Mode* (Proﬁle #3)

1. Connect two fully charged battery

packs to the EVX-2 and turn on your

transmitter.

EVX-2 Proﬁle Description

Proﬁle #1 (Sport Mode): 100% Forward, 100% Brakes, 100% Reverse

Proﬁle #2 (Race Mode): 100% Forward, 100% Brakes, No Reverse

Proﬁle #3 (Training Mode): 50% Forward, 100% Brakes, 50% Reverse

2. With the EVX-2 off, press and hold

the EZ-Set button until the light

turns solid green, then solid red and

then begins blinking red (indicating

the Proﬁle numbers).

Green to Red to Off

Three blinks Red

Selecting Sport Mode (Proﬁle #1)

1. Connect two fully charged battery

packs to the EVX-2 and turn on your

transmitter.

holding the SET button until

the light blinks red one time

and then releasing.

3. When the light blinks red three

times, release the EZ-Set button.

Release

Solid Green

2. With the EVX-2 off, press and hold

the EZ-Set button until the light

turns solid green, then solid red and

then begins blinking red (indicating

the Proﬁle numbers).

4. The light will then turn green and the model is ready to drive.

Green to Red to Off

One blink Red

Note: If you missed the mode you wanted, keep the EZ-Set button

pressed down and the blink cycle will repeat until a Mode is selected.

3. When the light blinks red once,

release the EZ-Set button.

Release

Solid Green

4. The light will then turn green and the model is ready to drive.

16 E-Maxx

•

*Patent-pending

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Driving your Model

Now it’s time to have some fun! This section contains instructions on

driving and making adjustments to your model. Before you go on, here

are some important precautions to keep in mind.

Another major factor which affects run time is how the model is driven.

Run times may decrease when the model is driven repetitively from a

stop to top-speed and with repetitive hard acceleration.

Allow the model to cool for a few minutes between runs. This is

particularly important when using high capacity battery packs that

allow extended periods of running. Monitoring temperatures will

extend the lives of the batteries and motors..

Tips for Increasing Run Time

Use batteries with the highest mAh rating you can purchase.

Use a high-quality peak-detecting charger.

Read and follow all maintenance and care instructions provided by

the manufacturer of your batteries and charger.

Do not continue to operate the model with low batteries or you

could lose control of it. Indications of low battery power include

slow operation and sluggish servos (slow to return to center). Stop

immediately at the ﬁrst sign of weak batteries. When the batteries in

the transmitter become weak, the red power light will begin to ﬂash.

Stop immediately and install new batteries.

Keep the EVX-2 cool. Get plenty of airﬂow across the ESC heat sinks.

Lower your gear ratio. Installing smaller pinion gears will lower your

gear ratio and cause less power draw from the motors and batteries,

and reduce overall operating temperatures. Always replace both

pinion gears together.

Do not drive the model at night, on public streets, or in large crowds

of people.

Vary your speed. Continuous high-speed, high-gear running shortens

the run time on the E-Maxx.

If the model becomes stuck against an object, do not continue to run

the motors. Remove the obstruction before continuing. Do not push

or pull objects with the model.

Maintain your model. Do not allow dirt or damaged parts to cause

binding in the drivetrain. Keep the motors clean.

Because the model is controlled by radio, it is subject to radio

interference from many sources beyond your control. Since radio

interference can cause momentary losses of control, allow a safety

margin of space in all directions around the model in order to

prevent collisions.

mAh Ratings and Power Output

The mAh rating of the battery can effect your top speed performance.

The higher capacity battery packs experience less voltage drop under

heavy load than low mAh rated packs. The higher voltage potential allows

increased speed until the battery begins to become discharged.

Use good, common sense whenever you are driving your model.

Intentionally driving in an abusive and rough manner will only result

in poor performance and broken parts. Take care of your model so

that you can enjoy it for a long time to come.

Running in Wet Conditions

Your new Traxxas E-Maxx is designed with water-resistant features to

protect the electronics in the model (receiver, servos, electronic speed

control). This gives you the freedom to have fun driving your E-Maxx

through puddles, wet grass, snow, and through other wet conditions.

Though highly water resistant, the E-Maxx should not be treated as

though it is submersible or totally, 100% waterproof. Water resistance

applies only to the installed electronic components. Running in wet

conditions requires additional care and maintenance for the mechanical

and electrical components to prevent corrosion of metal parts and

maintain their proper function.

High performance vehicles produce small vibrations which may

loosen hardware over time. Frequently check wheel nuts and other

screws on your vehicle to ensure that all hardware remains properly

tightened.

About Run Time

A large factor affecting run time is the type and condition of your

batteries. The milliamp hour (mAh) rating of the batteries determines

how large their “fuel tank” is. A 3000 mAh battery pack will theoretically

run twice as long as a 1500 mAh sport pack. Because of the wide variation

in the types of batteries that are available and the methods with which

they can be charged, it’s impossible to give exact run times for the model.

Precautions

Without proper care, some parts of your model can be seriously

damaged due to contact with water. Know that additional

maintenance procedures will be required after running in wet

E-Maxx 17

•

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Driving Your Model

conditions in order to maintain the performance of your model.

Do not run your model in wet conditions if you are not willing to

accept the additional care and maintenance responsibilities.

Motor Precautions

Titan motor life can be greatly reduced in mud and water. If the

motors get excessively wet or submerged, use very light throttle (run

the motors slowly) until the excess water can run out. Applying full

throttle to a motor full of water can cause rapid motor failure. Your

driving habits will determine motor life with wet motors. Do not

submerge the motors under water.

Not all batteries can be used in wet environments. Consult your

battery manufacturer to see if their batteries can be used in wet

conditions. Do not use LiPo batteries in wet conditions (note: the

EVX-2 is not LiPo compatible).

Do not gear the motors by temperature when running in wet

conditions. The motors will be cooled by water contact and will not

give an accurate indication of appropriate gearing.

The Traxxas TQ transmitter is not water resistant. Do not subject it to

wet conditions such as rain.

Do not operate your model during a rain storm or other inclement

weather where lightning may be present.

After Running Your Vehicle in Wet Conditions

1. Drain the tires by spinning the tires at full throttle to “sling” the water

out. An easy way to do this is to remove the body and set the truck

upside down on a ﬂat surface. Apply full throttle so the tires spin and

throw the excess water out of the holes you cut into the tires.

Do NOT allow your model to come in contact with salt water (ocean

water), brackish water (between fresh water and ocean water), or

other contaminated water. Salt water is highly conductive and highly

corrosive. Use caution if you plan to run your model on or near a beach.

2. Remove the batteries.

Even casual water contact can reduce the life of your motors. Special

care must be taken to modify your gearing and/or your driving style

in wet conditions to extend the life of the motors (details below).

3. Rinse excess dirt and mud off the truck with low-pressure water, such

as from a garden hose. Do NOT use pressure washer or other high-

pressure water. Avoid directing water into the bearings, transmission,

differentials, etc.

Before Running Your Vehicle in Wet Conditions

1. Consult the section “After Running Your Vehicle in Wet Conditions”

before proceeding. Make sure you understand the additional

maintenance required with wet running.

4. Blow off the truck with compressed air (optional, but recommended).

Wear safety glasses when using compressed air.

5. Remove the wheels from the truck

2. The wheels have small holes molded in to allow air to enter and exit

the tire during normal running. Water will enter these holes and get

trapped inside the tires if holes are not cut in the tires. Cut two small

holes (4mm or 3/16” diameter) in each tire. Each hole should be near

the tire centerline, 180 degrees apart.

6. Spray all the bearings, drivetrain, and fasteners with WD-40® or

similar water displacing light oil

7. Let the truck stand or you may blow off with compressed air. Placing

the truck in a warm sunny spot will aid drying. Trapped water and oil

will continue to drip from the truck for a few hours. Place it on a towel

or piece of cardboard to protect the surface underneath.

3. Conﬁrm that the RX box O-ring and cover are installed correctly and

secure. Make sure the screws are tight and the blue O-ring is not

visible protruding from the edge of the cover.

8. As a precautionary step, remove the sealed receiver box cover. While

unlikely, humidity or tiny amounts of moisture or condensation may

enter the receiver box during wet running. This can cause long-term

problems with the sensitive electronics in the receiver. Removing

the receiver box cover during storage allows the air inside to dry. This

step can improve the long-term reliability of the receiver. It is not

necessary to remove the receiver or unplug any of the wires.

4. Conﬁrm that your batteries can be used in wet conditions.

5. Use lower gearing (smaller pinion gears, as low as 12T) when running

in mud, deep puddles, snow, or other similar situations that will

restrict the tires and put much higher loads on the motors.

18 E-Maxx

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Driving Your Model

9. Additional Maintenance: Increase your frequency of disassembly,

inspection and lubrication of the following items: This is necessary

after extended wet use or if the vehicle will not be used for an

extended period of time (such as a week or longer). This additional

maintenance is needed to prevent any trapped moisture from

corroding internal steel components.

Receiver Installation

1. Always install the wires into the RX box before installing the receiver.

2. Install the antenna wire and

the servo cables into the

receiver box.

3. Arrange the wires neatly using

the wire guides in the receiver

• Stub axle housing bearings: Remove, clean, and re-oil the bearings.

• Front and rear differential: Remove,

box. The excess wire will be

disassemble, clean, and re-grease

bundled inside the receiver

the differentials. Refer to your

box. Label which wire is for

exploded view diagrams for help with

which channel.

disassembly and reassembly.

• Transmission: Remove, disassemble,

clean, and re-grease the transmission

components. Use a light coating of

4. Apply small bead of silicone grease

(Traxxas part #1647) to the wire clamp.

5. Install the wire clamp and tighten the two

2.8x8mm cap screws securely.

wheel bearing grease (from an auto

parts store) on the metal gear teeth.

6. Install the receiver into the box and plug the

wires into receiver. Refer to page 9 for the wiring diagram.

7. Make sure the O-ring is

properly seated into the

groove in the receiver box so

No grease is required for the nylon gears. Refer to your exploded

view diagrams for help with disassembly and reassembly.

• Titan motors: Remove the motors, clean with aerosol motor

cleaner, and re-oil the bushings with lightweight motor oil. Be sure

to wear eye protection when using spray aerosol cleaners.

that the cover will not pinch it

or damage it any way.

8. Install the cover and tighten

the two 3x10mm button-head

cap screws securely.

9. Inspect the cover to make sure that the O-ring seal is not visible.

Receiver Box: Maintaining a Watertight Seal

Removing and Installing Radio Gear

The unique design of the receiver box allows the removal and

installation of the receiver without losing the ability to maintain a

watertight seal in the box. The patent-pending wire clamp feature

gives you the ability to also install aftermarket radio systems and

maintain the watertight features of the receiver box.

Removing the Receiver

1. To remove the cover, remove the two 3x10mm button-head

cap screws.

2. To remove the receiver from the box simply lift it out and set to the

side. The antenna wire is still inside the clamp area and cannot be

removed yet.

3. Remove the wire clamp by removing the two 2.8x8mm cap screws.

4. Unplug the servo cables from the receiver and remove the receiver.

E-Maxx 19

•

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Tuning Adjustments

We recommend using two-hole pistons with

a range of oil viscosities from 30W to 50W

(available from your hobby shop). The thinner

viscosity oils (30W or less) flow with less

resistance and provide less damping, while

thicker oils provide more damping. Use only

100% pure silicone shock oil to prolong seal life.

From the factory, the E-Maxx uses 30W oil.

Suspension Tuning

Adjusting the Pivot Ball Caps

The pivot ball caps should be adjusted

so that the pivot balls operate freely in

the axle carriers with no excess play.

Use the provided four-way suspension

multi-tool to tighten or loosen the

pivot ball cap.

For easier access to the

rear-most shock mounting

screw, remove the one end

of the rear turnbuckle. In the

front, remove the suspension

pin from the lower front

suspension arm to gain easier

access to the lower shock

mounting screws.

The ride height for the E-Maxx can be adjusted

by adding or removing the clip-on spring pre-

load spacers. Note that changes in ride height

will occur when changes in shock angle or spring

rates are made. You can compensate for ride

height changes by changing the pre-load spacers

on the shocks

Caster Adjustment

The E-Maxx offers the ability to adjust the caster angle of the front

suspension. Caster adjustment may be used to influence the understeer/

oversteer handling characteristics of the E-Maxx. Increasing the caster

angle will increase the tendency of the truck to oversteer (less traction

on the rear tires, more traction on the front tires), while decreasing the

caster angle will cause the truck to have a tendency to understeer (push

in the turns). This effect becomes more pronounced at higher steering

angles and higher spring rates. Caster is adjusted by repositioning the

shims on the pivot point of the upper suspension arms.

Shock Mounting Positions

Big bumps and rough terrain require a softer suspension with the

maximum possible suspension travel and ride height. Racing on a

prepared track or on-road use requires a lower ride height and firmer,

more progressive suspension settings. The more progressive suspension

settings help reduce body roll (increased roll stiffness), dive during

braking, and squat during acceleration.

Caster adjustment shims (2 Rear)

Caster adjustment shims (2 Front)

Caster adjustment shims (1 Front, 1 Rear)

Upper shock mounting position

(A) should generally be used

with lower shock mounting

positions 1 and 2. Upper shock

mounting position (B) should

be generally be used with lower

shock mounting positions 3 and

4. The innermost upper shock

mounting position (0) can be

used for tuning with the inner

pair of lower shock mounting

positions on the arm (1,2). It

is not compatible with lower

shock mounting positions 3 and

4. Other combinations may be

used to achieve individualized

suspension settings.

Vertical

Ground plane

The stock caster setting is 7-degrees with one shim at each end of the

arm. Reduce the caster angle to 4-degrees by removing the rear shim

and inserting it next to the front shim. The caster angle can be increased

to 10-degrees by removing the front shim and inserting it next to the

rear shim.

Fine Tuning the Shocks

The eight shocks (oil dampers) on your E-Maxx have tremendous

influence on its handling. Whenever you rebuild your shocks, or make

any changes to the pistons, springs or oil, always do it carefully and in

sets (front or rear). Piston head selection depends on the range of oil

viscosities that you have available. For example, using a two-hole piston

with lightweight oil will give you the same damping as a three-hole

piston with heavier oil.

20 E-Maxx

•

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Tuning Adjustments

Lower Shock Mounting Positions

moved from position (1) to position (4). Each pair of lower shock

mounting holes (1,2 and 3,4) has equal ride height. Use lower ride

height for high-speed cornering and flat terrain, and when racing on

relatively smooth tracks. Increase the ride height for rougher terrain

and tracks.

In the out-of-the-box configuration, the shocks are installed in

position (A) on the shock tower and position (2) on the lower

suspension arm. This setting allows for firm suspension and low

ride height, increasing the spring force (at the wheel). This setting

improves high-speed cornering on smoother terrain by lowering the

center of gravity. Body roll, brake dive, and squat are also reduced.

Upper Shock Mounting Positions

The upper shock mounting positions will have suspension effects

opposite from the lower shock mounting positions.

The inner pair of holes on the lower suspension arm should

be used to increase the ride height of the E-Maxx. The more vertical

position of the shocks will allow for lower shock progression and the

soft, plush feel that’s characteristic of a Traxxas Maxx Truck.

Spring rate (at the wheel), increases as the upper shock mounting

position is moved from position (A) to position (B).

Ride height is not affected by changes in the upper shock mounting

position.

Spring rate (at the wheel) increases as the lower shock mounting

position is moved from position (1) to position (4). This is equivalent

to using stiffer springs. Use higher spring rate settings for flatter

terrain with smaller and fewer bumps, and lower spring rate settings

for bigger bumps.

Use the chart below to see the effect of the various shock mounting

positions. The horizontal length of the lines indicates the amount of

suspension travel. The angle or slope of the lines indicates the spring

rate (at the wheel).

Ride height decreases as the lower shock mounting position is

Wheel Force vs. Wheel Travel

2.5

Lower Mount 1, Upper Mount 0

Lower Mount 2, Upper Mount 0

Lower Mount 1, Upper Mount A

Lower Mount 2, Upper Mount A

Lower Mount 3, Upper Mount A

Lower Mount 4, Upper Mount A

Lower Mount 1, Upper Mount B

Lower Mount 2, Upper Mount B

Lower Mount 3, Upper Mount B

Lower Mount 4, Upper Mount B

Lower Mount 4

Lower Mount 3

Lower Mount 2

Lower Mount 1

More Firm

1.5

Less Firm

0.5

Wheel Travel (mm)

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100

E-Maxx 21

•

Tuning Adjustments

Alignment Settings

Transmission Tuning

Adjusting the Slipper Clutch

The E-Maxx is

equipped with an

adjustable Torque

Control slipper

clutch which is built

into the large spur

gear. The purpose

Adjusting the Toe-in

To achieve a good starting

point for the slipper clutch,

tighten the slipper clutch

adjusting nut clockwise until

the slipper clutch adjusting

spring fully collapses (do not

over tighten), and then turn

the slipper clutch nut counter-

clockwise ¼ to ½ turn.

Your E-Maxx comes from the factory with

zero degrees of toe-in in the front, and

one degree of toe-in in the rear. You can

adjust the toe-in on the front and rear of

the truck. Set the steering trim on your

transmitter to neutral. Next, adjust your

steering turnbuckles so that both front

wheels are pointing straight ahead and

are parallel to each other (0 degrees toe-

in). This will ensure the same amount of

steering in both directions. Adjust the

rear toe control links so that the rear

wheels have 1˚ of toe-in.

Tighten

Loosen

of the slipper clutch

is to regulate the amount of power sent

to the rear wheels to prevent tire spin. When

it slips, the slipper clutch makes a high-pitch,

whining noise.

Right Hand

(Normal) Threads

Increase

Length

Left Hand

Threads

To adjust the slipper clutch, remove the rubber

Decrease

Length

Static Camber Adjustment

slipper clutch plug on the transmission cover. The slipper clutch is

integrated into the main spur gear on the transmission. The slipper

clutch is adjusted using the spring-loaded locknut on the slipper

shaft. Use the supplied universal wrench. To tighten or loosen the

slipper nut, insert the 2.0mm hex wrench into the hole in the end

of the slipper shaft. This locks the shaft for adjustments. Turn the

adjustment nut clockwise to tighten (less slippage) and counter-

clockwise to loosen (more slippage).

The wheels can be set to have either

positive or negative camber (see illustration

below). The camber angle changes as the

wheel moves up and down through its range

of travel. Static camber is the camber angle at

the wheel when the vehicle is set at its normal,

stationary ride height.

All of the toe links are installed

on the truck so that the left

hand thread indicators point

to the same direction. This

makes it easier to remember

which way to turn the wrench

to increase or decrease toe link

length (the direction is same

at all four corners). Note that

the groove in the hex indicates

the side of the toe link with the

left-hand threads.

The suspension pivot balls located in the axle

carriers adjust the static camber. The pivot

balls are protected by blue dust plugs. To

adjust your static camber, insert the supplied

2.5mm hex wrench through the slit in the dust plug and engage the

end of the pivot ball (compressing the suspension until the arms are

parallel to the ground will allow for easier hex wrench engagement).

The upper pivot ball is normally screwed all the way in. Negative

camber is achieved by screwing the pivot ball of the lower control

arm out. Note: When camber is changed, the toe angle of the wheel

has to be reset.

Wheels and Tires

Many types of aftermarket tires and wheels can be adapted for

use on your model. Most will affect the overall width and the

suspension geometry of the model. The offsets and dimensions

designed into the model’s wheels are intentional; therefore,

Traxxas cannot recommend the use of other non-Traxxas wheels

with different speciﬁcations. The diameter of the wheels is an

innovative design, and there is a variety of different tires available

for you to experiment with in addition to the included tires on the

model (listed in your parts list). Experimentation with different

types of tires is recommended to see which ones work the best on

the terrain where the model is run. When selecting tires, consider

the overall diameter and the rubber compound (hard or soft). If

the overall diameter of the tire is signiﬁcantly increased, you will

need to use a smaller pinion gear to compensate for the larger tire.

Soft compound tires with many short spikes generally work better

on hard, dry surfaces. In loose dirt, a tire with large spikes should

perform better. See your parts list for accessory wheels and tires.

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Static Camber Base

Factory Settings

Front: 1-degree negative

camber each side

Rear: 1-degree negative

camber each side

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Positive Camber

Negative Camber

22 E-Maxx

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Tuning Adjustments

Gearing Compatibility Chart:

The chart below shows a full range

of gear combinations. This does NOT

imply that these gear combinations

should be used. Over-gearing

(bigger pinions, smaller spurs) can

overheat and damage the motor

and/or speed control.

Adjusting Gear Mesh

Motors and Gearing

The Titan^™550 Motors on your E-Maxx have been carefully designed

to match the needs of the E-Maxx. The Titans are made to run

efﬁciently at high voltage to provide more torque and longer run

times. We do not recommend converting the E-Maxx to a typical

low voltage setup using traditional 540 size motors. While these

components will physically ﬁt into the E-Maxx, the system will not run

as efﬁciently, losing power in the form of motor and battery heating.

The result will be shorter run times, high current draw, and extreme

battery and motor temperatures. If you are considering replacement

motors, look for 550 motors capable of 12 or more volts.

Incorrect gear mesh is the most

common cause of stripped spur

gears. Gear mesh should be

checked and adjusted anytime

a gear is replaced. Access the

gears by removing the single

screw on the top gear cover.

Spur Gear

To set the gear mesh, cut a

narrow strip of notebook paper

and run it into the gear mesh.

Loosen the motor screws and

slide a motor and pinion gear

into the spur gear. Retighten

the motor screws and then

remove the strip of paper.

Repeat with the other motor.

You should be able to run a

fresh strip of paper through the

gears without binding them.

29.57

27.29

Motor

Screws

The E-Maxx is equipped from the factory with a 68-tooth spur gear

and 19-tooth pinion gears. E-Maxx has a large range of gearing

making it suitable for many different types of applications and

environments. If you want more acceleration and less top speed, use

a smaller pinion gear (fewer teeth, higher numerical ratio). The overall

reduction is the number of turns the motor makes for one revolution

of the tire. Higher numerical ratios provide more torque, lower

numerical ratios provide more top speed. With the Titan motors,

do not use a pinion gear larger than 20-tooth with the stock 68-

tooth spur gear with 6-cell battery packs or a pinion gear larger

than 19-tooth with the stock 68-tooth spur gear when using 7-cell

battery packs. Use the following formula to calculate the overall ratio

for combinations not listed on the gear chart:

Strip of

Paper

24.23 25.34

22.61 23.65

21.20 22.18

19.03 19.95 20.87

17.97 18.84 19.71

Dual Steering System

Your new E-Maxx uses dual-servo steering and a single heavy-duty

servo saver for powerful, responsive steering. To prevent damage

to the steering servos, it is important to make sure that the servos

are “at rest” when the steering is at neutral. If one servo is out of

adjustment, then both servos will work against each other, ﬁghting

to ﬁnd center.

17.85 18.67

17.74

# Spur Gear Teeth

x 5.22 = Final Gear Ratio

# Pinion Gear Teeth

Going Brushless

Brushless motors provide increased power output and greater

efﬁciency. The E-Maxx is designed with extra transmission and

driveline strength to make it capable of handling extreme brushless

power. One or two brushless motors may be used. A specially

designed motor plate (part # 3997X) and gear cover (part # 3977X)

are available for optimized, single-motor installations. If you plan

to run LiPo battery packs to power a LiPo-compatible brushless

system, optional battery hold downs (part # 3927X) are available to

accommodate larger, high capacity 2S and 3S LiPo battery packs.

Center

Stock factory gearing

Drag Link

Not for 14-cell

battery running

Servo Horn

Not recommended

Toe Link

Servo Horn

Bellcrank

Servo Saver

For the ultimate in extreme brushless speed and acceleration, install

twin Velineon power systems (part number 3350). Two Velineon

brushless motors powered by two Velineon VXL-3s speed controls in

tandem results in amazing power output. Visit www.Traxxas.com for

more details about power upgrades.

Toe Link

E-Maxx 23

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Tuning Adjustments

Adjusting the Steering System

1. Disconnect the short steering link that connects the servo saver

to the servo horn.

2. Remove the drag link that connects the two servo horns.

3. Remove the servo horns

4. Connect a pair of charged batteries to the ESC. Turn on the

transmitter, then the ESC. Note: It is recommended to unplug

the motors or remove the pinion gears during steering setup.

5. Adjust the steering trim on the transmitter to the

neutral “0” position.

6. Install both servo horns. Make sure they are parallel to the

center line of the chassis (pointing to the rear of the truck).

7. Connect the short steering link from the servo saver to the

servo horn. Make sure the servo saver is parallel to the center

line of the chassis (also parallel to the servo horns). If not,

make small adjustments to the length of the link so the

everything is parallel.

10. Connect the center drag link to one of the steering servos.

Check for alignment with the holes in the second steering link.

If these do not line up, make small adjustments to the length of

the link until the holes line up.

11. Connect the center drag link to the second steering

servo horn.

12. If necessary, ﬁne tune the length of the center link to eliminate

any load on the steering system in the neutral position.

If you are using aftermarket servos, it is important to use servo

horns designed for E-Maxx. Optional steering servo horns are sold

separately for use with non-Traxxas servos.

8. The steering should operation correctly with equal travel left

and right. Now connect the second servo.

9. Conﬁrm the length of the center drag link (89.5mm - see

template, below).

Center Drag Link

89.5mm

24 E-Maxx

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Maintaining your Model

Your model requires timely maintenance in order to stay in top

running condition. The following procedures should be taken

very seriously.

Motors: Every 10-15 runs, remove, clean, and lubricate the

motors. Use a product such as electric motor cleaning spray to

ﬂush dirt out of the motors. After cleaning, lubricate the bushings

at each end of the motors with a drop of light-weight electric

motor oil.

Always wear eye protection

when using compressed

air or spray cleaners and

lubricants.

Inspect the vehicle for obvious damage or wear. Look for:

1. Cracked, bent, or damaged parts

2. Check the wheels and steering for binding.

3. Check the operation of the shock absorbers.

4. Check the wiring for any frayed wires or loose connections.

5. Check the mounting of the receiver and servo(s) and

speed control.

6. Check the tightness of the wheel nuts with a wrench.

7. Check the operation of the radio system, especially the

condition of the batteries.

Shocks: Keep the oil level in the shocks full. Use only 100%

pure silicone shock oil to prolong the life of the seals. If you are

experiencing leakage around the top of the shock, inspect the

bladder in the top cap for signs of damage or distortion from

overtightening. If the bottom of the shock is leaking, then it

is time for a rebuild. The Traxxas rebuild kit for two shocks is

part #2362.

8. Check for any loose screws in the chassis structure

or suspension.

9. Inspect the gears for wear, broken teeth, or debris lodged

between the teeth.

10. Check the tightness of the slipper clutch.

11. Check the tightness of the front pivot balls.

Suspension: Periodically inspect the model for signs of damage

such as bent or dirty suspension pins, bent turnbuckles, loose

screws, and any signs of stress or bending. Replace components

as needed.

Driveline: Inspect the driveline for signs of wear such as worn

drive yokes, dirty axle half shafts, and any unusual noise or

binding. Remove the gear cover and Inspect the spur gear for

wear and check the tightness of set screws in the pinion gears.

Tighten, clean, or replace components as needed.

Other periodic maintenance:

Slipper clutch pads (friction material):

Under normal use, the friction material in the slipper clutch

should wear very slowly. If the thickness of any one of the slipper

clutch pads is 1.8mm

Storage

or less, the friction disc

When you are through running the model for the day, blow it off

with compressed air or use a soft bristled paint brush to dust-off

the vehicle. Always disconnect and remove the batteries from the

model whenever the model is stored. If the model will be stored for

a long time, then also remove the batteries from the transmitter.

should be replaced.

Measure the pad

thickness using calipers

or measuring against

the diameter of the 1.5 and

2.0mm hex wrenches provided

with the model.

Chassis: Keep the chassis clean of accumulated

dirt and grime. Periodically inspect the chassis for

damage.

E-Maxx 25

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Troubleshooting

The following section addresses some very basic ESC and radio questions

you may have about your model. Most questions arise from simple user

errors or minor adjustments that are easy to correct. If you can’t ﬁnd a

solution for your model here, then visit our website at www.Traxxas.

com/support. There you will ﬁnd a much more extensive and detailed online

troubleshooting area. In addition, you may call Traxxas Customer Service at

1-888-TRAXXAS (outside the US call 972-265-8000).

Steering servos do not work:

Check the wires, radio system, crystals, battery and motor connectors,

and the battery packs.

Possible internal damage. Contact Traxxas for service.

Motor(s) run backwards:

Motor(s) wired backwards: check the wiring and correct.

Backwards motor timing: reverse the motor end bells.

Radio system does not work properly:

Receiver glitches/throttle stutters during acceleration:

Motor capacitors broken or missing: check and replace the capacitors.

The receiver or antenna is too close to power wires or batteries.

Bad connections: check the wiring and connectors.

If the power light on the transmitter does not come on, check for proper

battery installation and that the batteries are new and/or fully charged.

If the power light is blinking, then the transmitter batteries are weak and

should be replaced. See page 11 for more details.

If the transmitter light is on but the radio is still not responding, check for

proper installation of batteries in the model and that the batteries are

new and/or fully charged. Check to make sure the on/off switch on the

model is in the on position. Check for damaged wires, a loose crystal, or

loose connections. See page 11 for more details.

Motor worn: replace the motor.

Excessive current to the motor: use a milder motor or a smaller pinion gear.

Model runs slowly / slow acceleration:

Check the motor and battery connectors.

Check to see if EVX-2 is in Proﬁle #3 (50% throttle)

Bad battery or motor: check the operation with known good batteries

(freshly charged) and motor.

Incorrect transmitter or speed control adjustment. Reprogram the EVX-2.

Motor is improperly geared: use a milder motor or a smaller pinion gear.

Check the drive train for binding or restrictions.

Short radio range:

If the radio range appears short, then ﬁrst check to make sure the

transmitter antenna is fully extended and that the antenna in the model

is in place and has not been cut or damaged. Next, make sure the

batteries are all fully charged. Finally, if you are still experiencing short

range, try a different location. Sometimes there can be interference from

various sources that can cause your radio to malfunction.

Gear mesh too tight or binding, refer to “Adjusting Gear Mesh” on page 23.

EVX-2 overheats and shuts down:

Overloading the motor (running through tall grass, binding in the

drivetrain).

Insufﬁcient ventilation for the heat sinks. Cut ventilation holes in the body

or relocate the EVX-2.

Motor may exceed maximum speciﬁcation. The EVX-2 is limited to motors

with no fewer 12-turns (550 size) with Traxxas High-Current Connectors.

Motor is improperly geared. Use a milder motor or a smaller pinion gear.

Check the drivetrain for restrictions.

Steering channel works, but the motor(s) will not run:

The motor(s) could be bad or have a damaged brush. Check the motor(s)

and motor connections by supplying power directly to the motor(s).

Note: Disconnect the motor(s) from the ESC before testing. Remove the

pinion gear from the motor(s) or elevate the driving wheels to avoid a

runaway and damage to the vehicle.

The speed control has thermally shut down (look for a solid green LED).

Allow the speed control to cool down. See the overheating section.

Make sure the EVX-2’s power cable is plugged into the throttle channel

of the receiver (Channel 2). Check the operation of the radio system’s

throttle channel with a servo.

Model will not go in reverse:

Make sure the throttle trim is in the correct position (green light on EVX-2

should be solid)

Check for correct EVX-2 proﬁle (Proﬁle #2 does not have reverse).

Possible internal damage. Contact Traxxas for service.

Motor runs as soon as the batteries are plugged in:

Before turning on EVX-2: Internal damage, Contact Traxxas

for service.

EVX-2 will not go into programming mode:

Make sure the EVX-2 is plugged into Channel 2 (the throttle channel) on

the receiver. If it is plugged into Channel 3 or the battery terminal, it will

not go into programming mode.

Keep stripping spur gears:

Be sure the EVX-2 is turned off before trying to program or select a proﬁle.

Improper gear mesh, refer to “Adjusting Gear Mesh” on page 23.

Loose motor. Readjust mesh and tighten the motor screws.

Unplug batteries, reconnect, and repeat programming instructions

26 E-Maxx

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Index

Alignment Settings, 22

Antenna

operation, 15

Receiver, 9, 10, 19

box, 19

proﬁle selection, 16

Race mode, 16

mount, 6

Ride Height, 21

receiver, 9, 11

setup programming, 15

speciﬁcations, 15

Sport mode, 16

Run Time, 17

antenna crimp nut, 11

antenna nut wrench, 5, 11

transmitter, 13

Safety, 4

Servos, 6, 10

Training mode, 16

transmitter adjustments, 15

ESC; see Electronic Speed Control (EVX-2)

Gears (Gearing), 23

gear mesh, 23

servo horn, 23

Axle carrier, 6, 20, 22

Batteries

servo saver, 23

Set Button, 9

AA alkaline batteries, 5, 10

AA rechargeable batteries, 5, 10

charging, 4, 12

Shocks (Oil Damper)

ﬁne tuning, 20

gear ratio, 23

mounting positions, 20–21

ride height, 21

compartment, 6

installing, 12

Half Shaft, 6

Hex hub, 6

shock tower, 6

LiPo, 5, 12, 23

High-Current Connector, 9, 12, 13

mAh, 10, 17

spring rate, 21

NiCad, 10

Skid plate, 6

NiMH, 10

Maintenance, 25

Molex Connector, 12, 13

Motor (Titan), 6, 9, 23

maintenance, 25

Pinion Gear, 23

Slipper Clutch, 6, 22, 25

Speed control; see Electronic Speed Control (EVX-2)

Spring Rate, 21

safety, 4

side-by-side packs, 12

stick packs, 12

Spur Gear, 23

Battery Hold-Down, 6, 12

BEC (Battery Eliminator Circuit), 10

Bellcrank, 23

Steering System, 23

adjusting, 24

Pivot ball, 6, 25

adjusting caps, 20

camber adjustment, 22

Quick Start, 7

drag link, 23, 24

Body Mount, 6

Storage, 25

Brushless, 23

Suspension Arm, 6

Suspension Maintenance, 25

Suspension Tuning, 20

Thermal Shutdown Protection, 10

Tires, 22

Bulkhead, 6

Radio System (TQ), 9–14

adjustment, 13

Bumper, 6

Camber, 22

channel, 9, 10

Caster, 20

controls, 13

Charger, 12

frequency

tire gluing, 8

Charging; see Batteries: charging

Chassis, 6

band, 10

Toe-in, 22

clearing your, 10, 14

range-testing, 14

rules, 14

Toe link, 6, 20, 22, 23, 25

Tools, 5

maintenance, 25

Crystal (X-tal), 9, 10

Decals, 8

Training Mode, 16

Transmission, 6

setup, 14

Differential (Diff), 6

Driveline, 25

terminology, 10

tuning, 22

transmitter, 9, 10

batteries, 10, 11

Transmitter; see Radio System (TQ): transmitter

Troubleshooting, 26

Tuning Adjustments, 20–24

Turnbuckle; see Toe link

Turning on the model, 14

Wheels, 22

Driving, 17, 18, 19

wet conditions, 17, 18, 19

Electronic Speed Control (EVX-2), 6, 9, 10, 15, 16

fast mode changes, 16

heat sinks, 4, 9

light ﬂashes, 11

servo reversing switch, 13

throttle neutral adjustment, 13

trim, 9, 10, 13

E-Maxx 27

LED, 9, 14, 15, 16, 26

wiring, 9

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owners manual

MODEL 3905

1100 Klein Road, Plano Texas 75074

1-888-TRAXXAS

071121 KC0547

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