Land Pride Lawn Mower DM3705 Series User Manual

Disc Mowers  
DM3705, DM3706, and DM3707 Series  
21019  
327-083M  
Operator’s Manual  
Read the Operator’s manual entirely. When  
you see this symbol, the subsequent  
instructions and warnings are serious - follow  
without exception. Your life and the lives of  
others depend on it!  
!
© Copyright 2006 Printed  
9/15/06  
Cover photo may show optional equipment  
not supplied with standard unit.  
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Important Safety Information  
Important Safety Information  
These are common practices that may or may not be applicable to the products described in  
this manual.  
Safety at All Times  
Look For The Safety Alert Symbol  
Thoroughly read and understand  
the instructions given in this  
manual before operation. Refer to  
the “Safety Label” section, read  
all instructions noted on them.  
The SAFETY ALERT SYMBOL indicates there is a  
potential hazard to personal safety involved and extra  
safety precaution must be taken. When you see this  
symbol, be alert and carefully read the message that  
follows it. In addition to design and configuration of  
equipment, hazard control and accident prevention  
are dependent upon the awareness, concern,  
prudence and proper training of personnel involved in  
the operation, transport, maintenance and storage of  
equipment.  
Do not allow anyone to operate  
this equipment who has not fully  
read and comprehended this  
manual and who has not been  
properly trained in the safe  
operation of the equipment.  
!
Operator should be familiar with  
!
Be Aware of  
Signal Words  
WARNING  
all functions of the unit.  
Indicates a potentially hazardous  
situation which, if not avoided, could  
result in death or serious injury, and  
includes hazards that are exposed  
when guards are removed. It may also  
be used to alert against unsafe  
practices.  
Operate implement from the  
driver’s seat only.  
A Signal word designates a degree or  
level of hazard seriousness. The  
signal words are:  
Make sure all guards and shields  
are in place and secured before  
operating the implement.  
!
DANGER  
Do not leave tractor or implement  
unattended with engine running.  
Indicates an imminently hazardous  
situation which, if not avoided, will  
result in death or serious injury. This  
signal word is limited to the most  
extreme situations, typically for  
machine components that, for  
functional purposes, cannot be  
!
CAUTION  
Dismounting from a moving  
tractor could cause serious injury  
or death.  
Indicates a potentially hazardous  
situation which, if not avoided, may  
result in minor or moderate injury. It  
may also be used to alert against  
unsafe practices.  
Do not stand between the tractor  
and implement during hitching.  
Keep hands, feet, and clothing  
away from power-driven parts.  
Wear snug fitting clothing to avoid  
entanglement with moving parts.  
Turning tractor too tight may  
cause implement to ride up on  
wheels. This could result in injury  
or equipment damage.  
For Your Protection  
Shutdown and Storage  
Thoroughly read and understand  
the “Safety Label” section, read all  
instructions noted on them.  
Lower machine to ground, put  
tractor in park, turn off engine, and  
remove the key.  
Detach and store implements in a  
area where children normally do  
not play. Secure implement by  
using blocks and supports.  
OFF  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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9/15/06  
1
 
Important Safety Information  
These are common practices that may or may not be applicable to the products described in  
this manual.  
Use Safety  
Lights and Devices  
Use the following maximum  
speed - tow load weight ratios as  
a guideline:  
Transport  
Machinery Safely  
Slow moving tractors,  
Comply with state and local laws.  
20 mph when weight is less than  
self-propelled equipment, and  
towed implements can create a  
hazard when driven on public  
roads. They are difficult to see,  
especially at night.  
or equal to the weight of tractor.  
Maximum transport speed for  
implement is 20 mph. DO NOT  
EXCEED. Never travel at a speed  
which does not allow adequate  
control of steering and stopping.  
Some rough terrain require a  
slower speed.  
10 mph when weight is double  
the weight of tractor.  
IMPORTANT: Do not tow a load  
that is more than double the  
weight of tractor.  
Flashing warning lights and turn  
signals are recommended  
whenever driving on public roads.  
Sudden braking can cause a  
towed load to swerve and upset.  
Reduce speed if towed load is not  
equipped with brakes.  
Allow implement to cool  
Practice Safe Maintenance  
Tractors With Cabs or  
ROPS  
completely.  
Understand procedure before  
doing work. Use proper tools and  
equipment, refer to Operator’s  
Manual for additional information.  
Do not grease or oil implement  
There should be sufficient  
clearance for the operator when  
mounted to a tractor with a cab or  
that is equipped with ROPS.  
while it is in operation.  
Inspect all parts. Make sure parts  
are in good condition & installed  
properly.  
Work in a clean dry area.  
Lower the implement to the  
ground, put tractor in park, turn off  
engine, and remove key before  
performing maintenance.  
The ROPS may need to be  
extended or flipped around to  
obtain sufficient clearance.  
Remove buildup of grease, oil or  
debris.  
Remove all tools and unused  
parts from implement before  
operation.  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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2
9/15/06  
Important Safety Information  
These are common practices that may or may not be applicable to the products described in  
this manual.  
Wear  
Prepare for Emergencies  
Protective Equipment  
Be prepared if a fire starts.  
Protective clothing and equipment  
Keep a first aid kit and fire  
should be worn.  
extinguisher handy.  
Wear clothing and equipment  
Keep emergency numbers for  
appropriate for the job. Avoid  
doctor, ambulance, hospital and  
loose fitting clothing.  
fire department near phone.  
Prolonged exposure to loud noise  
can cause hearing impairment or  
hearing loss. Wear suitable  
hearing protection such as  
earmuffs or earplugs.  
Operating equipment safely  
requires the full attention of the  
operator. Avoid wearing radio  
headphones while operating  
machinery.  
911  
Tire Safety  
Keep Riders  
Off Machinery  
Tire changing can be dangerous  
and should be performed by  
trained personnel using the  
correct tools and equipment.  
When inflating tires, use a clip-on  
chuck and extension hose long  
enough to allow you to stand to  
one side and NOT in front of or  
over the tire assembly. Use a  
safety cage if available.  
Riders obstruct the operator’s  
view, they could be struck by  
foreign objects or thrown from the  
machine.  
Never allow children to operate  
equipment.  
When removing and installing  
wheels, use wheel handling  
equipment adequate for the  
weight involved.  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
9/15/06  
3
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Important Safety Information  
the correct safety labels are included in the request. To  
Safety Labels  
Your Mower comes equipped with all safety labels in place.  
They were designed to help you safely operate your implement.  
order new labels go to your Land Pride dealer.  
5. Refer to this section for proper label placement.  
To install new labels:  
1. Read and follow label directions.  
a. Clean area the label is to be placed.  
2. Keep all safety labels clean and legible.  
3. Replace all damaged or missing labels.  
4. Some new equipment installed during repair require safety  
labels to be affixed to the replaced component as specified  
by Land Pride. When ordering new components make sure  
b. Spray soapy water on the surface where label is to be  
placed.  
c. Peel backing from label. Press firmly onto the surface.  
d. Squeeze out air bubbles with edge of a credit card.  
818-540C  
13102  
Danger Guard Missing  
ROTATING DRIVELINE  
KEEP AWAY!  
818-552C  
13102  
Danger PTO Driveline  
818-626C  
Danger Crushing Hazard  
21020  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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4
9/15/06  
 
Important Safety Information  
21021  
818-641C  
Danger Rotating Blades  
21020  
818-641C  
Danger Rotating Blades  
818-642C  
21020  
Danger Thrown Object  
818-132C  
21021  
Danger Thrown Object  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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9/15/06  
5
Important Safety Information  
838-094C  
21021  
Warning: High Pressure  
838-824C  
Danger: Pinch Point Hazard  
21021  
818-558C  
21020  
Warning:  
General Mower Safety  
818-543C  
21025  
Warning Guard Missing  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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9/15/06  
Introduction  
Introduction  
Land Pride welcomes you to the growing family of new  
product owners.  
NOTE: A special point of information that the  
operator must be aware of before continuing.  
This Disc Mower has been designed with care and built  
by skilled workers using quality materials. Proper  
assembly, maintenance, and safe operating practices  
will help you get years of satisfactory use from the  
machine.  
Owner Assistance  
The Warranty Registration card should be filled out by  
the dealer at the time of purchase. This information is  
necessary to provide you with quality customer service.  
Application  
If customer service or repair parts are required contact a  
Land Pride dealer. A dealer has trained personnel, repair  
parts and equipment needed to service the mower.  
The Land Pride Disc Mowers are designed and built to  
cut hay, grass, and other cultivated forage crops on  
farms, ranches, set-aside acres, and right-of-ways. They  
are adapted for 540 rpm 3-point hitch Category II offset  
mounting and are Quick-Hitch adaptable. They are  
compatible with 35 HP to 80 HP tractors equipped with  
live or independent PTO’s. The DM3705 has 5 discs and  
an 82" cutting width. The DM3706 has 6 discs and a 96"  
cutting width and the DM3707 has 7 discs and a 112"  
cutting width.  
The parts on your Disc Mower have been specially  
designed and should only be replaced with genuine Land  
Pride parts. Therefore, should your mower require  
replacement parts go to your Land Pride Dealer.  
Serial Number Plate  
For prompt service always use the serial number and  
model number when ordering parts from your Land Pride  
dealer. Be sure to include your serial and model numbers  
in correspondence also. Refer to Figure 1 for the location  
of your serial number plate.  
Land Pride Disc Mowers are designed to deliver good  
cutting performance even in thick, tangled, and wet grass  
conditions. Standard replaceable rock guards provide  
cutter bar protection in stony conditions and will greatly  
extend cutter bar life. A standard break-away latch will  
release, allowing the cutter bar to swing back, if an  
obstacle is hit.  
Land Pride Disc Mowers are well suited for use in  
agricultural regions where humidity and moisture  
conditions are typically higher, where there is a potential  
for crop entanglement, and where tough ground  
conditions are present. See “Features and Benefits”,  
“Section 5” for additional information.  
20775  
Using This Manual  
Serial Number Plate Location  
Figure 1  
This Operator’s Manual is designed to help familiarize  
you with safety, assembly, operation, adjustments,  
troubleshooting, and maintenance. Read this manual  
and follow the recommendations to help ensure safe  
and efficient operation.  
Further Assistance  
Your dealer wants you to be satisfied with your new Disc  
Mower. If for any reason you do not understand any part  
of this manual or are not satisfied with the service  
received, the following actions are suggested:  
The information contained within this manual was  
current at the time of printing. Some parts may change  
slightly to assure you of the best performance.  
1. Discuss the matter with your dealership service  
manager making sure he is aware of any problems  
you may have and that he has had the opportunity to  
assist you.  
To order a new Operator’s or Parts Manual contact  
your authorized dealer. Manuals can also be  
downloaded, free-of-charge from our website at  
Service & Support Center by your dealer.  
2. If you are still not satisfied, seek out the owner or  
general manager of the dealership, explain the  
problem and request assistance.  
Terminology  
“Right” or “Left” as used in this manual is determined by  
facing the direction the machine will operate while in use  
unless otherwise stated.  
3. For further assistance write to:  
Land Pride Service Department  
1525 East North Street  
P.O. Box 5060  
Definitions  
IMPORTANT: A special point of information related  
to its preceding topic. Land Pride’s intention is that  
this information should be read and noted before  
continuing.  
Salina, Ks. 67402-5060  
E-mail address  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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9/15/06  
7
       
Section 1: Assembly and Set-Up  
Section 1: Assembly and Set-Up  
Tools Required  
Fork lift, crane hoist or block-and-tackle  
Impact wrench or socket and ratchet set (English &  
metric)  
Rubber mallet  
DM3705  
Box-end (english & metric), allen (english & metric)  
and crescent wrenches  
Drift pins  
Screwdriver  
Safety shoes, safety glasses and gloves. A hard hat  
should be worn by anyone working under the crane.  
DM3706  
DM3707  
Assembly Preparation  
Having all parts and equipment readily at hand will speed  
up your assembly task and make the job as safe as  
possible.  
Prepare Disc Mower assembly area by removing other  
equipment and then sweeping it clean of dust and  
contaminants. Un-pack crate and remove all contents.  
Be careful not to break hydraulic seals or pull off  
hydraulic components.  
15144  
Cutter Bar Plate Rotation  
Figure 1-1  
NOTE: Remove heavy components from crate with  
a hoist or block-and-tackle.  
Gearbox and Cutter Bar Lubrication  
The gearbox and cutter bar should arrive filled with SAE  
90 GL4 (EP) gear lube. However, you should check oil  
level in both before using and add oil if necessary.  
Raise 3-point mainframe with a forklift, hoist or block-  
and-tackle and place on pallets or blocks so it is elevated  
about 10” off the floor.  
Your cutter bar is shipped assembled and must be  
checked for correct cutter plate arrangement. Figure 1-1  
indicates correct cutter plate arrangement for different  
on page 22 to make adjustments to cutterplates.  
IMPORTANT: The recommended quantity of cutter  
bar oil should not be exceeded. Results of overfilling  
will be overheating with potential for severe damage  
to the cutterbar.  
Also shown in Figure 1-1 is a rotation arrow on each  
cutter plate indicating direction of cutter plate rotation.  
The cutting edge of the cutter blades should lead in the  
direction of cutter plate rotation. This direction alternates  
from one cutter plate to the next. Make certain all cutting  
blades have been mounted correctly. Remove any  
blades installed incorrectly and reinstall them in the  
correct cutting direction. Refer to “Blade Replacement”  
on page 21 for instructions on how to install blades.  
Additional instructions and specifications for gearbox  
and cutter bar are provided as noted below:  
Gearbox Lubrication . . . . . . . . . . . . . . . . . . . .page 23  
Cutter Bar Lubrication. . . . . . . . . . . . . . . . . . .page 24  
Gearbox Specifications. . . . . . . . . . . . . . . . . .page 25  
Cutter Bar Specifications . . . . . . . . . . . . . . . .page 25  
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9/15/06  
       
Section 1: Assembly and Set-Up  
(A). Secure with 1” SAE flat washer (#10) and 5/32”  
x 1 3/4” cotter pin (#11). Do not reconnect upper  
spring to pin (B) until after mower is attached to  
tractor’s 3-point arms.  
Main Frame to Cutter Bar Assembly  
Refer to Figure 1-2:  
4. The cutter bar gearbox (#1) is shipped with nylon  
bushings (#2) mounted on both sides of gearbox thru  
input shaft. Slide reach arm pivot lug (#3) over nylon  
bushing (#2) as shown.  
PTO Guard Assembly  
Refer to Figure 1-2:  
5. Slide pivot lug arm bracket (#4) over nylon bushing  
(#2) as shown. Attach pivot lug arm bracket (#4) to  
reach arm weldment (#3) with 3/4” x 1 1/4” grade 5  
hex head bolts (#5), and Lockwashers (#6). Apply  
LocTite to bolt threads and tighten to proper torque.  
1. Attach bell shaped guard (#15) to main frame  
housing with spacer (#14), 5/16” x 1 1/4” hex bolt  
(#16), lockwasher (#17), and flat washer (#18).  
Tighten to correct torque.  
Support Stand Assembly  
6. Remove linch pin (#13) and 1” USS flat washer (#12)  
to disconnect upper spring (#9) from pin (B).  
Refer to Figure 1-2:  
Reattach linch pin (#13) and flat washer (#12) to pin  
(B) for safe keeping. Attach upper spring (#9) to pin  
1. Remove linch pin (#7) to adjust support stand (#8).  
Raise or lower stand in guide tube to a suitable  
height and replace linch pin.  
21022  
Figure 1-2  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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9
     
Section 1: Assembly and Set-Up  
(#10) and tighten to a loose fit. Insert three 3/8” x  
2 1/8” clevis pins (#14) through the support arms as  
shown and secure with 1/8” cotter hair pin (#13).  
Cutter Bar Assembly  
Refer to Figure 1-3:  
2. Attach outside material guide (#3) to cutter assembly  
with 1/2” x 3 1/2” grade 5 hex head bolt (#8), 1” dia.  
x 2” compression spring (#15), flat washer (#12), and  
nylock nut (#11) as shown. Tighten locknut to  
compress spring (#15) only enough to retard guide  
movement.  
4. Assembly rear curtain support frame (#2) to curtain  
support beam (#6) with six 3/8” x 2 1/2” grade 5 hex  
bolts (#9). Secure with hex nylock nuts (#10) and  
tighten to correct torque.  
5. Do not attach end bumpers (#7) to curtain support  
frames until instructions for “Canvas Curtain  
Assembly” on page 12 are completed.  
3. Assembly front curtain support frame (#1) to curtain  
support beam (#6) with three 3/8” x 2 1/2 grade 5 hex  
bolts (#9) as shown. Secure with hex nylock nuts  
21023  
Figure 1-3  
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9/15/06  
 
Section 1: Assembly and Set-Up  
7. Install smaller driven pulley (#14) with 5/16” x 2” key  
(#4) to cutter gearbox input shaft. Align pulley (#14)  
with pulley (#13) and tighten either taperlock bolts or  
set screws to correct torque.  
Main Frame Assembly (Back Side)  
Refer to Figure 1-4 and Figure 1-5:  
1. Remove plastic cap from lower port in hydraulic  
cylinder (#15) and extend cylinder (#15) to connect  
cylinder rod eye (A) to pin (B). Secure with 1” Flat  
washer (#11) and cotter pin (#12).  
Loosen pivot bolt and pulley tensioning bolt. Install  
drive belt (#16) over pulleys (#13, & #14) and tension  
per instructions for ““Belt Tension Adjustment” on  
2. Attach O-ring fitting (#18) to cylinder port opening  
and tighten. Attach hydraulic hose (#19) to O-ring  
fitting (#18) and tighten.  
9. Reinstall outer belt guard housing (#20) to inner belt  
guard mounting plate with seven 1/4” hex bolts (#5),  
lock washers (#9), and flat washers (#10).  
3. Attach coupler (coupler supplied by owner, not by  
Land Pride) to opposite end of cylinder hose (#19).  
4. Install inner belt guard with four 3/8” x 1” hex bolts  
(#6), flat washers (#9), and lockwashers (#10).  
5. Check hub type in both pulleys. Pulleys with  
standard bore hubs are provided with set crews.  
Pulleys with an oversized bore are provided with  
taper lock busings that must be inserted into the  
pulleys. Do not tighten taper lock bushings until after  
they have been assembled to the shaft.  
Port Opening located  
under the cylinder  
6. Install larger drive pulley (#13) with 5/16” x 2” key  
(#4) to main jack shaft allowing 3/8” clearance  
between pulley and inner shield. Tighten either  
taperlock bolts or set screws to correct torque.  
21052  
Figure 1-5  
21024  
Figure 1-4  
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11  
 
Section 1: Assembly and Set-Up  
4. Attach canvas curtain to center curtain support  
Canvas Curtain Assembly  
Refer to Figure 1-6:  
beam (#9) using cable ties (#2).  
5. Attach canvas curtain to support frames (#6 & #7)  
using cable ties (#3).  
1. Place canvas curtain (#1) over curtain support  
frames (#6 & #7) with sewn cut-out end located over  
cutter gearbox.  
2. Slip curtain canvas eyelets (A) over curtain support  
frame end posts (B).  
!
DANGER  
Do not operate cutting unit without tarp in place!  
3. Reattach end bumpers (#4) to curtain support  
frames (#6, & #7) with cotter pins (#5).  
21031  
Figure 1-6  
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9/15/06  
 
Section 2: Operating  
Section 2: Operating  
3-point Pin Set-up  
Refer to Figure 2-1:  
Tractor Hook-up  
The 3-point pins in the mower may be arranged four  
different ways to accommodate different tractor sizes.  
The first 3-point offset arrangement shown below  
positions the first cutter blade closest to the tractor. Each  
arrangement thereafter is further away. Select a pin  
arrangement that will allow the first cutter blade to extend  
beyond the tractor’s back right wheel far enough to cut a  
full mower swath without the tractor’s wheel running over  
material being cut.  
!
DANGER  
Refer to Figure 1-2 on page 9. Do not connect or disconnect  
mower to tractor with upper spring (#9) connected to pin (B).  
The upper spring pulls on the 3-point main frame and will  
quickly turn the main frame upon removing one of the tractor’s  
3-point arms.  
6. Back tractor up to the disc mower so that the lower  
3-point arms are aligned with lower lift pins of the  
disc mower. Connect to lower 3-point arms with  
proper attaching hardware. Connect 3-point upper  
link.  
7. Raise mower cutter bar off the ground slightly by  
actuating the hydraulic cylinder.  
8. Adjust length of tractor’s two sway link arms to  
prevent swaying from side to side.  
9. The check chain is used when tractor’s 3-point hitch  
is unable to hold the mower in the working position.  
Attach check chain to top 3-point center link of tractor  
making sure that hitch stop pin is aligned with run  
indicator decal #838-524C as shown in Figure 2-2  
below. This is known as the working position.  
.
21021  
Figure 2-2  
IMPORTANT: Mower must be leveled at the 3-point  
arms for mower and hitch level stop pin to work  
properly.  
10. With mower attached, park tractor on a flat level  
surface and adjust lower 3-point draft arms to level  
mower. Verify levelness by measuring distance from  
center of connecting pins to floor. This distance  
should be the same for both connecting pins.  
20774  
Figure 2-1  
11. Raise support leg and position it in the high position.  
IMPORTANT: The tractor must have enough  
counter weight on the front to transport over rough  
terrain without front wheels lifting off the ground.  
!
WARNING  
Be sure driveline is properly connected. A loose yoke could slip  
and cause personal injury or damage to the mower.  
12. Add ballast weights to front of tractor as needed to  
counter balance mower weight.  
!
CAUTION  
By their nature rotary disc throws debris and although curtain  
stops most of it, some debris is still thrown towards the operator.  
Select a tractor with a cab or shield to protect operator from  
thrown debris.  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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13  
     
Section 2: Operating  
a. Raise or lower 3-point lower arms until Disc  
Driveline Installation  
Mower and tractor PTO shafts are approximately  
level with each other. Securely block Disc Mower  
frame in this position.  
Refer to Figure 2-3 on page 14:  
An additional driveline may be required if Disc Mower is  
to be used on more than one tractor especially if a quick  
hitch is used.  
b. Set tractor in park, shut tractor engine off, set park  
brake and remove switch key.  
c. Pull driveline apart into two sections as shown in  
Figure 2-3. Attach outer driveline universal joint to  
tractor PTO shaft. Attach inner driveline universal  
joint to gearbox shaft. Pull on each driveline  
section to be sure universal joints are secured to  
the shafts.  
!
WARNING  
Damaged drivelines can cause serious injury or death.  
!
CAUTION  
d. Hold driveline sections parallel to each other to  
determine if they are too long. The inner and outer  
shields on each section should end approximately  
1" short of reaching the universal joint shield on  
the adjacent section (see “B” dimension). If they  
are too long, measure 1" (“B” dimension) back  
from universal joint shield and make a mark at this  
location on inner and outer driveline shields.  
Tractor PTO shield and all Disc Mower guards must be in  
place at all times during operation!  
!
WARNING  
Damaged drivelines can cause serious injury or death.  
e. Cut off inner shield at mark (“X” dimension). Cut  
same amount off inner shaft (“X1” dimension).  
Repeat cut off procedure (“Y” & “Y1” dimensions)  
to cut outer driveline half.  
!
CAUTION  
Always engage parking brake, shut off tractor and remove key  
before dismounting from tractor.  
f. Remove all burrs and cuttings.  
IMPORTANT: Some tractors are equipped with  
multi-speed PTO ranges. Be certain your tractor ‘s  
PTO is set for 540 rpm.  
IMPORTANT: Always check driveline minimum length  
during initial setup, when connecting to a different  
tractor and when alternating between using a quick  
hitch and a standard 3-point hitch. More than one  
driveline may be required to fit all applications.  
IMPORTANT: It is necessary to aligning tractor’s  
PTO shaft level with Disc Mower’s gearbox shaft  
when checking driveline minimum length. Too long a  
driveline can damage tractor, gearbox and driveline.  
Checking Driveline Minimum Length  
22227  
Refer to Figure 2-3:  
1. Start tractor and slowly engage 3-point to move  
lower arms until Disc Mower’s gearbox shaft is  
approximately level with tractor's PTO shaft.  
Figure 2-3  
5. Apply multi-purpose grease to the inside of outer  
driveline shaft and reassemble the two shafts.  
2. Slide inner yoke of driveline over gearbox shaft and  
secure in place.  
6. Attach inner driveline yoke to mower gearbox input  
shaft.  
3. Slide outer yoke of driveline over tractor PTO shaft  
and secure with locking collar. Skip to step 5 on page  
14 if driveline fits between tractor and Disc Mower.  
7. Attach outer driveline yoke to tractor's PTO shaft.  
8. The driveline should now be moved back and forth to  
insure that both ends are secured to the tractor and  
Disc Mower PTO shafts. Reattach any end that is  
loose.  
4. The driveline will require shortening if it is too long to  
fit between tractor and Disc Mower. Shorten driveline  
as follows:  
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Section 2: Operating  
IMPORTANT: Two small chains are supplied with  
the driveline. These chains must be attached to  
outer and inner driveline yoke shields and to the  
cutter deck and tractor to restrict driveline shields  
from rotating.  
9. Hook one of the driveline safety chains in a hole on  
the outer driveline yoke shield and the opposite end  
to the tractor to restrict outer shield rotation.  
10. Hook second driveline safety chain in a hole on the  
inner driveline yoke shield and the opposite end to  
the Disc Mower to restrict inner shield rotation.  
11. Start tractor and raise Disc Mower just enough to  
remove blocks used to support Disc Mower frame in  
step 4a on page 14.  
12. Slowly engage tractor’s hydraulic 3-point to lower  
Disc Mower. Check for sufficient drawbar clearance.  
Move drawbar ahead, aside or remove if required.  
Rope Hook-up  
Refer to Figure 2-4:  
Two ropes are provided so that the operator does not  
need to get off the tractor to unlock cutter bar in the up  
position after transporting. Thread both ropes through  
the guide loop (#1) located on top of the main frame and  
tie free ends to tractor within reach of operator.  
21033  
Figure 2-5  
Upper Spring Connection  
Refer to Figure 1-2 on page 9:  
!
DANGER  
21020  
Do not connect or disconnect mower to tractor with upper  
spring (#9) connected to pin (B). The upper spring pulls on  
3-point main frame and will quickly turn main frame upon  
removing one of the tractor’s 3-point arms.  
The upper spring (#9) should be connected to pin (B)  
after mower has been hooked-up to a tractor and  
disconnected from pin (B) before unhooking mower from  
a tractor.  
Figure 2-4  
After Hooking-up Mower to Tractor  
Transport Latch Operation  
Attach upper spring (#9) by retracting hydraulic cylinder  
until spring’s slotted bar is inserted over pin (B). Secure  
upper spring to pin (B) with flat washer (#12) and linch  
pin (#13).  
Refer to Figure 2-5:  
Change mower from field position to transport position by  
pulling on field run latch rope and retracting hydraulic  
cylinder until transport latch (#2) engages.  
Before Unhooking Mower From Tractor  
Change mower from transport position to field position by  
retracting hydraulic cylinder, pulling on transport latch  
rope (#2), and then extending hydraulic cylinder until  
cutter bar reaches field running position.  
Disconnect upper spring (#9) by retracting hydraulic  
cylinder until upper spring slotted bar can be removed  
from pin (B). Remove flat washer (#12), linch pin (#13),  
and slotted bar from pin (B). Return washer and linch pin  
to pin (B) for storage.  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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15  
         
Section 2: Operating  
2. Refer to Figure 2-2 on page 13. Position 3-point  
Spring Tension Adjustment  
arms so that hitch level stop pin aligns with run  
indicator arrow (decal 838-524C).  
!
DANGER  
3. Refer to Figure 2-7 below. Retract hydraulic cylinder  
to release upper spring tension and loosen jam nut.  
Adjust spring by turning it until “X” dimension is equal  
to the dimension represented below for your mower.  
This dimension should adjust pick-up weight of  
mower end to approximately 100 lbs when hydraulic  
cylinder is extended to field operating position.  
Retighten jam nut.  
Before making any adjustments to this implement, disengage  
PTO, shut off tractor, remove ignition key and wait for all  
moving parts to stop. Disconnect PTO driveline.  
There are two springs on the mower. The lower spring  
attached to the reach arm adjusts response time  
between when 3-point arms raise and when cutter bar  
starts to raise. The upper spring attached to the curtain  
support arm adjusts ability of cutter bar to float on the  
ground.  
DM3705 . . . . . . . . . . . . . . . . . . .X = Approximately 3”  
Dm3706 . . . . . . . . . . . . . . . . . . .X = Approximately 2”  
DM3707 . . . . . . . . . . . . . . . . . . .X = Approximately 1”  
Adjusting Lower Spring Tension  
IMPORTANT: The mower must be leveled for lower  
spring tension to work properly. See Tractor Hook-  
up paragraph 5 on page 13 for instructions on  
leveling.  
X”  
1. Refer to Figure 2-2 on page 13. Position 3-point  
arms so that hitch level stop pin aligns with run  
indicator arrow (decal 838-524C).  
Jam Nut  
2. Refer to Figure 2-6 below. Adjust accordingly by  
turning handle until “X” dimension is equal to the  
dimension represented below for your mower.  
21040  
Figure 2-7  
DM3705. . . . . . . . . . . . . . . . X = Approximately 2 3/4”  
Dm3706. . . . . . . . . . . . . . . . X = Approximately 2 1/8”  
DM3707. . . . . . . . . . . . . . . . X = Approximately 1 1/2”  
Transporting  
!
CAUTION  
3. The lower spring may need readjusting after several  
hours of running.  
When traveling on public roads at night or during the day, use  
accessory lights and devices for adequate warning to operators  
of other vehicles. Comply with all federal, state and local laws.  
X”  
IMPORTANT: Always disengage tractor’s PTO  
before raising mower to transport position.  
NOTE: When raising mower to transport position be  
sure that PTO shaft does not contact tractor or  
mower.  
Cylinder Spring Mount  
Handle  
1. Raise cutter bar so it is in a vertical position.  
2. Make sure transport lock engages.  
21039  
3. Make sure support leg is secured in the high  
position.  
Figure 2-6  
4. Approach disc mower from rear making sure Slow  
Moving Vehicle emblem on tractor is visible to  
oncoming traffic.  
Adjusting Upper Spring Tension  
IMPORTANT: The mower must be leveled for upper  
spring tension to work properly. See Tractor Hook-up  
paragraph 5 on page 13 for instructions on leveling.  
5. Select a safe ground speed when transporting from  
one area to another. When traveling on roadways,  
transport in such a way that faster moving vehicles  
may pass you safely.  
1. Attach upper spring slotted arm to mower as outlined  
6. When traveling over rough or hilly terrain, shift tractor  
to a lower gear.  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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Section 2: Operating  
1. Lower mower using tractor 3-point lift.  
Operating Check List  
2. Retract hydraulic cylinder and pull rope to disengage  
In addition to design and configuration of equipment,  
hazard control and accident prevention are dependent  
upon awareness, concern, prudence and proper training  
involved in operation, transport, maintenance and  
storage of equipment. Perform inspection checks before  
cutting with the mower.See Operating Checklist on left  
side of this page.  
3. Raise 3-point hitch so inner end of cutter bar is  
approximately 12” off the ground. Lower cutter bar  
hydraulic cylinder to position outside end of cutter  
bar to just touch the ground. Refer to Figure 2-2 on  
page 13 and lower 3-point to working position so that  
hitch level stop pin aligns with run indicator arrow  
(decal 838-524C).  
Operating Checklist  
4
Check Reference  
4. Put tractor hydraulics into float position. The mower  
will not follow ground contours correctly if not in float  
position.  
Safety Rules have been read and Page 1  
Operating Instructions have been read  
and understood.  
This  
section  
NOTE: Before using the mower, check safety  
break-away linkage to make sure all components  
Check oil level in gearbox and cutter  
bar.  
Check to see that all oil plugs in  
gearbox and cutter bar are installed and  
tight.  
Mowing Instructions  
NOTE: Although mower is shielded to prevent  
objects from being thrown by the blades, no one  
shield is 100% effective. Most people are not  
knowledgeable of dangers to being around a disc  
mower while it is in operation. Therefore, the  
operator should always stop mowing when  
someone is near by.  
Check to see that all nuts and bolts are  
tight.  
Check to see that all guards and shields  
are in place.  
Operator’  
s Manual  
Lubricate mower as noted in  
Maintenance and Lubrication  
Section.  
!
WARNING  
Check to see that all implement  
attaching points and hardware are  
secure and in place.  
Operator’  
s Manual  
Prolonged exposure to high sound levels require hearing  
protection. Wear hearing protection when operating this  
machine with open platform tractors.  
Check all Hydraulic lines and fittings for  
leaks.  
Operator’  
s Manual  
Allow a few minutes for oil to spread in cutter bar before  
engaging PTO when changing from transport to  
operating position.  
Working Position  
With cutting bar on the ground, engage PTO at low  
tractor idle and accelerate gradually to 540 rpm PTO  
speed.  
!
DANGER  
The driveline and gearbox shields must be in place and secure  
when operating to avoid injury or death from entanglement in  
rotating drivelines.  
If cutter bar is operated at an angle for long periods of  
time, hold it horizontal for a few minutes every half hour  
or so of work to help lubricate gears at either end of cutter  
bar.  
Adapt forward speed to working conditions. Gear down  
when mowing in dense crops. Do not lower tractor rpm.  
!
DANGER  
Do not operate mower without the curtain completely in place  
around cutter bar. Do no lean against or stand on curtain.  
Adverse Field Conditions  
!
!
WARNING  
WARNING  
Before lowering cutter bar, make sure no one is within 20 feet of  
mower.  
The upper gears will not receive sufficient lubricant if cutterbar  
cutting angle is more than 35°up or down. Also the belt guard  
and drive belt will be damaged if cutter bar cutting angle is  
down more than 35°  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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Section 2: Operating  
The cutting angle is defined as the angle the cutter bar is  
to the tractor axle during operation. For example, cutter  
bar angle would be down if cutting a declined surface  
from a level surface and up if cutting and inclined  
surface. Do not exceed a maximum of 35° up or down.  
Damage to cutter gears, belt guard and drive belt may  
occur.  
The stack of spring washers should be compressed to  
3 3/4” to 3 7/8”. See figure 2-8  
.
3 3/4”  
3 7/8”  
!
DANGER  
Do not use machine in rocky or stony conditions.  
Extra care and precaution should be taken in rough or  
debris-ridden fields. The following adjustments should  
be made to the mower in these conditions to minimize  
possibility of foreign objects being deflected by the  
cutting blades.  
15092  
1. Lengthen top 3-point center linkage to tilt angle of  
cutter bar and raise height of cutter knives.  
Spring Washers  
figure 2-8  
2. Reduce forward speed.  
Spring washers can get flat over time and will need to be  
replaced. To replace weak spring washers, see “Blade &  
3. Check cutting blades to make sure they pivot after  
hitting an obstruction.  
IMPORTANT: If an obstruction is hit, disengage  
PTO, idle engine, shut off tractor, remove ignition  
key and wait for all moving parts to come to a  
complete stop. Inspect entire mower and repair any  
damage before resuming operation.  
Operating Instructions  
By now you should have thoroughly read your Disc  
Mower Operator’s Manual, properly attached your Land  
Pride Disc Mower to your tractor, and reviewed  
Operating Check list. If you have not yet completed all of  
these functions, please do so now.  
!
Now that you’re properly briefed and your Disc Mower is  
ready, it’s time to transport to the field.  
CAUTION  
Do not disengage PTO when engine is at full PTO rpm except  
in emergency situations such as when hitting an obstruction.  
When possible, always idle engine before disengaging PTO.  
For transport purposes, your Disc Mower should be  
securely locked with the cutter bar in the upright or  
vertical position. Make sure the support leg is in the high  
position. A “Slow Moving Vehicle” sign should be in place  
and visible from the rear if you are using a public road or  
right-of-way. Select a safe speed and transport to your  
cutting site in such manner that faster moving vehicles  
can pass you safely.  
IMPORTANT: To avoid personal injury, pick up all  
rocks and other debris before mowing. Never  
assume an area is clear, so enter a new area  
carefully. Cut material higher the first time to allow  
mower to clear unseen objects.  
Once you have safely arrived at your field, position the  
tractor on level ground. Make sure that no one is within  
20 ft of the mower and lower the 3-point hitch to a point  
where the inboard end of the cutter bar is approximately  
12" off of the ground. Retract your lift cylinder and pull on  
the latch cord to release the transport or road-latch  
mechanism. Using your lift cylinder control lever, slowly  
lower the cutter bar until the outer end touches the  
ground. Adjust the 3-point hitch to “working position”  
where the hitch level stop pin aligns with run indicator  
arrow as shown in Figure 2-2 on page 13. Lock the 3-  
point hitch control lever in place. Lock the hydraulic lever  
of tractor in float position. Your Disc Mower is now in  
working position.  
Safety Break-Away  
The break-away latch allows cutter bar to swing back if  
an obstruction is hit. If latch releases, stop tractor  
immediately, idle engine and disengage PTO.  
To reset cutter bar, back mower slowly and carefully until  
break-away latch repositions. The factory setting of latch  
is adapted to most working conditions.  
Check cutter bar for any damage before resuming  
operation.  
If cutter bar continues to break away after resetting,  
spring assembly pressure can be increased. In all cases  
the length must not be less than 3 3/4” to 3 7/8” or safety  
disengagement cannot function.  
Controlling or setting your cutting height is accomplished  
by adjusting the “top link” on your 3-point hitch.  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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Section 2: Operating  
Extending or lengthening the top link will raise your  
cutting height, while shortening the top link will lower the  
cutting height. If you are cutting in an area you are not  
familiar with or believe there might be rocks or debris  
present, you must raise the cutting height accordingly.  
This will reduce the potential of personal injury and/or  
damage to the machine. Shut the mower down  
immediately if someone approaches in a vehicle or on  
foot.  
If you do hit an object when you are mowing, immediately  
disengage the PTO, idle the engine, stop the tractor, wait  
for all moving parts to come to a complete stop, shut off  
the tractor, set the brake, remove the keys, and inspect  
for damage. If damage is present, make the necessary  
repairs. If no damage is present, but you have tripped the  
Break Away Safety Latch, slowly reverse the tractor until  
the latch resets and proceed with mowing operations.  
Prior to actually beginning cutting operations, you will  
want to get the mower up to full 540 rpm PTO speed by  
engaging the PTO with the tractor engine at idle and  
gradually increasing engine rpm to PTO speed. Once  
you reach the full 540 rpm, allow the mower to run for a  
few minutes at level position so the oil in the cutter bar  
can lubricate all internal moving parts. You will also want  
to take this opportunity to make a quick Operational  
Running Check. Listen and visually inspect for any  
component or part that may be loose or out of  
adjustment. Don’t be alarmed by the noise level of the  
free running Disc Mower. It will actually become quieter  
when you begin mowing and have some run in time on it.  
If your Operational Running Check was ok, begin  
mowing operations by opening up lands on your field.  
Make enough lands so you can easily make turns to  
properly line up for each pass down the field. If your  
tractor and Disc Mower are set up right, you should be  
able to straddle the previous swath as you make each  
subsequent pass starting in the center of the field. If you  
do experience cutting problems, refer to the “Trouble  
Shooting” section of the Operator’s Manual for corrective  
action.  
When you are done mowing for the day and need to  
transport the mower to your storage site, simply pull on  
the field run latch rope and retract the hydraulic cylinder  
until the transport latch engages.  
When you are done mowing for the season, clean and  
lubricate your mower, replace warn or missing parts,  
release tension on the belts, install the stroke control to  
the tarp frame cushion spring rod and store the unit with  
the cutter bar in the horizontal working position. You will  
get longer service life out of your mower by storing it  
inside and repainting scratched or rusted components.  
With a little practice and experience you should become  
very good at operating your Land Pride Disc Mower.  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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19  
Section 3: Adjustments  
Section 3: Adjustments  
Belt Tension Adjustment  
Belt must be properly tensioned at all times to avoid  
excessive flopping and slipping. A loose belt will also  
cause poor cutting and premature wear.  
32 lbs at Midpoint  
Check tightness of belt regularly, especially when  
working the first few hours.  
Always retighten or check belt after 4-8 hours of  
operation.  
Refer to Figure 3-1:  
4. Loosen main pivot bolt.  
5. Tighten nut on belt tension bolt until you have a  
3/4” deflection using approximately 32 lbs. of force at  
midpoint between pulleys. Tighten main pivot bolt.  
Refer to Figure 3-2.  
3/4”  
20766  
Belt Deflection  
Figure 3-2  
Pivot  
Bolt  
Tension Bolt  
21032  
Belt Tension Adjustment  
Figure 3-1  
This is done by varying the upper 3-point hitch link length  
until desired cutting height is achieved. Shorten the  
upper 3-point hitch link to lower and lengthen to raise.  
Cutting Height  
Refer to Figure 3-4:  
Cutting height can be adjusted with the upper 3-point  
hitch link.  
To minimize blade and disc wear, improve grass  
regrowth and get maximum nutritive value from the crop,  
minimum cutting height should never be adjusted less  
than 1 1/4“.  
Maximum cutting height of 2 3/8” is achieved when the  
discs are parallel to the ground. Adjustment of cutting  
height is achieved by altering the cutter bar tilt angle.  
20796  
Cutting Height  
Figure 3-4  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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9/15/06  
     
Section 4: Maintenance and Lubrication  
Section 4: Maintenance and Lubrication  
General Maintenance  
Proper servicing and adjustment is the key to long life of  
any implement. With careful and systematic inspection,  
you can avoid costly maintenance, time and repair.  
!
CAUTION  
When changing blades, always replace blade bolt & blade nut  
together at the same time. Worn or damaged blade bolts or nuts  
could fail in a hazardous manner that could cause injury.  
!
DANGER  
Blade Replacement  
Before servicing this implement, turn off tractor engine, remove  
ignition key and disconnect PTO driveline.  
NOTE: Always replace blades on cutterplates in  
pairs.  
Each new mower should be checked after the first 10  
hours of work. All screws and bolt torques should be  
routinely checked.  
1. New blades are 1.85” wide. Blades should be  
replaced when they are worn to about 1 5/16” (B)  
wide at a distance of 3/8” from the disc. Length (A) of  
the blade should be greater than 2 1/2”.  
At beginning of season:  
6. Check and/or change oil; lubricate or grease all  
points. See Lubrication in this section.  
2. Replace blades if hole for securing bolt has become  
oval by 3/32” more than diameter of original hole.  
7. Check blade wear and condition of their fasteners,  
see “Servicing Blades”, page 21.  
8. Check wear on guards and curtain.  
9. Inspect belts, see “Belt Tension Adjustment”,  
10. Check all screws and bolts to be sure they are tight.  
Servicing Blades  
Cutting quality as well as safe operation depend on  
regular inspection and care given to the knives.  
15093  
Blade Wear  
Figure 4-1  
!
WARNING  
To avoid personal injury when blades and/or carrier are being  
serviced, always block mower up to prevent it from falling.  
Blade Fastener Replacement  
NOTE: Always replace blade bolts and nuts when  
they have been removed 5 times.  
Check blades for cracks and wear and blade bolts for  
tightness daily. Blades should be replaced when they are  
worn excessively, bent, nicked, deformed, or out of  
balance.  
1. Replace fasteners when a visible deformation is  
found.  
Blades are sharpened on both edges so that they may be  
turned over to extend their cutting life. Always turn over  
both blades on a cutterplate at the same time.  
2. Replace bolts when wear on bolt head reaches  
contact area of blade.  
3. Replace bolts when flat sides at bolt flanges are  
excessively worn or missing altogether.  
NOTE: Blade bolts should be tightened to 55 ft-lb  
torque.  
4. Replace bolts when diameter (D) of bolt shoulder is  
less than 5/8”.  
NOTE: Always replace damaged blades. Never  
straighten a bent blade. Never replace one knife  
only per disc. Always replace both of them to avoid  
creating an out-of-balance force.  
5. Replace nuts when height (H) of nut is less than half  
of original height of 3/8”.  
20798  
!
CAUTION  
Replace with Land Pride blades only. Substitute blades may not  
meet specifications and may fail in a hazardous manner that  
could cause injury.  
Figure 4-2  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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21  
               
Section 4: Maintenance and Lubrication  
Belleville Washer Replacement  
Storage  
It is good practice to clean off any dirt or grease that may  
have accumulated on mower and moving parts at end of  
working season or when mower will not be used for a  
long time.  
The Belleville washers on break-away bar may become  
flat and weak over use and should be replaced when  
cutter bar continues to break-away after resetting. See  
information on the Spring Washers.  
1. Clean Disc Mower as necessary.  
2. Check blades and blade fasteners for wear and  
replace if necessary, see “Servicing Blades”, Page  
Blade & Belleville Washer Pt. No’s.  
Description  
Part No.  
3. Inspect mower for loose, damaged or worn parts and  
adjust or replace as needed.  
Cutter Blade Clockwise . . . . . . . . . . . . . . . .890-769C  
Cutter Blade Counter Clockwise . . . . . . . . .890-770C  
M12 Blade Bolt . . . . . . . . . . . . . . . . . . . . . .802-708C  
M12 Blade Hex Flange Nut . . . . . . . . . . . . .803-311C  
Break-Away Belleville Washers . . . . . . . . . .804-186C  
4. Lubricate as noted in “Section 4: Maintenance and  
5. Release tension on drive belt.  
6. Move stroke control to disconnect position.  
7. Store cutter bar in horizontal (operating) position.  
8. Store Disc Mower inside if possible for longer Disc  
Mower life.  
Cutter Bar Timing Adjustment  
For removal of one or more disc shaft assemblies.  
9. Repaint parts where paint is worn or scratched to  
prevent rust.  
6. The long axis of the two discs adjacent to the  
replaced shaft assembly should be rotated 90  
degrees to the long axis of cutter bar as shown  
7. Line up new gear’s mounting holes with gear  
mounting holes in cutter bar.  
8. Rotate gear so that the axis of the two disc mounting  
holes are 90 degrees to the long axis of cutter bar as  
shown.  
9. Try sliding gear into place. Steps 2 and 3 may need to  
be repeated, using the next pair of holes until the  
gear will slide into place. Apply sealant between gear  
assembly housing and cutter bar and bolt gear  
housing to cutter bar.  
10. The disc will mount to the gear with its long axis  
parallel to the long axis of cutter bar and 90 degrees  
to the axis of adjacent discs when the gear is lined up  
correctly.  
20797  
Disc Assembly  
Figure 4-3  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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9/15/06  
         
Section 4: Maintenance and Lubrication  
Lubrication  
Lubrication  
Legend  
Multi-purpose  
spray lube  
Multi-purpose  
grease lube  
Multi-purpose  
oil lube  
Intervals in hours  
at which lubrication  
is required  
50  
20  
Hours  
Driveline Inner Tube  
Type of Lubrication: Multi-purpose Grease  
Quantity = Clean & coat inner tube of driveline with a light  
film of grease and then reassemble.  
21037  
8
Hours  
Driveline U-Joints  
Type of Lubrication: Multi-purpose Grease  
14293  
As  
Required  
Gearbox  
Check oil level in gearbox by removing oil fill plug and  
checking dipstick. If level is below line on dipstick, add oil.  
NOTE: Do not overfill. Mower should be level when  
checking oil.  
Type of Lubrication: SAE 90 GL4 (EP) gear lube  
Quantity = fill until level with line on dipstick  
21031  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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23  
       
Section 4: Maintenance and Lubrication  
As  
Required  
Cutter Bar  
Check oil level in cutter bar by removing filler level plug with  
cutter bar in transport position. (Fill/Level plug is located  
between first and second discs on DM3705 and between  
second and third discs on DM3706 and DM3707.) Add oil if  
level is low.  
20772  
IMPORTANT: The recommended oil quantity should  
not be exceeded. Results of overfilling will be  
overheating with potential for severe damage to  
cutterbar. Mower should be level and cutter bar vertical  
when checking oil. Be sure to let cutting bar set in  
vertical position for a few minutes before checking to  
allow time for oil to flow to bottom of bar.  
Type of Lubrication: SAE 90 GL4 (EP) gear lube  
Quantity = Fill until level with filler level plug hole. (See  
important note above.)  
20  
Hours  
Frame Pivot Point  
Type of Lubrication: Multi-purpose Grease  
21032  
20  
Hours  
Hitch Pivot Point  
Type of Lubrication: Multi-purpose Grease  
21032  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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9/15/06  
     
Section 5: Specifications & Capacities  
Section 5: Specifications & Capacities  
37 Series Disc Mowers  
DM3705  
DM3706  
6
DM3707  
7
Number of Discs  
5
Cutting Width  
6’ 9”  
8’ 0”  
9’ 4”  
Transport Width  
74”  
74”  
74”  
Cutter Bar Oil capacity  
Weight (approximate)  
Blade Overlap  
5.92 pints  
1210 lbs.  
6.55 pints  
1269 lbs.  
3”  
7.4 pints  
1329 lbs.  
Recommended Tractor PTO HP Range  
PTO speed  
35 - 80 HP  
540 RPM  
15,764 FPM  
2.06  
Disc tip speed  
Gearbox Ratio  
Gearbox Oil capacity  
1.48 pints  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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9/15/06  
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Section 6: Features & Benefits  
Section 6: Features & Benefits  
DM37 Series Disc Mowers  
Features  
Benefits  
Cutter bar 81”, 96” and 112” widths 5, 6 and 7 Disc models available to meet a wide range of customer needs.  
Common oil chamber Gears splash oil from gear to gear.  
Warranty 2 Years Parts & Labor on cutter bar and gearbox. One year Parts & Labor on hydraulic  
cylinder, hydraulic hoses, and seals are considered wear items.  
Cutting blades and belts are considered wear items.  
Maximum cutting angle 35 Degrees down, and 35 degrees up for cutting along embankments.  
(Angle cutter bar is to tractor axle)  
Narrow transport 74” - usually not much wider than tire distance, safer in transport.  
Hook-ups Three types of hook-ups. Cat. 2, Cat. 2 Quick-Hitch, and Cat. 3.  
Rock guards Replaceable.  
Hydraulic cutterbar lift Quickly raise for obstructions.  
Cutterbar drive Gear drive for high efficiency and long life.  
1 1/4” Minimum cutting height Run skid shoes on ground to mow very short.  
Power drive belt Stronger than multiple belt system.  
2 hardened blades per disc, Reversible blades give double life, hardened for longevity against debris.  
reversible  
3” Blade overlap Eliminates skipping for a cleaner cut.  
High blade tip speed 15,764 fpm, offers a nice clean cut.  
Storage stand Aids in storage and hooking to tractor.  
Skid shoes Easily replaceable when worn out.  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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26  
9/15/06  
 
Section 7: Troubleshooting  
Section 7: Troubleshooting  
Problem  
Cause  
Solution  
Dull Blades.  
Mower not level.  
Replace blades.  
Not cutting clean  
Adjust machine.  
Ground speed too fast.  
Reduce ground speed.  
Free blades.  
Blades locked back.  
Blade on wrong for rotation of disc  
Conditions too wet for cutting.  
Change blade pairs for correct rotation blades  
Allow grass to dry before cutting. Slow ground  
speed of tractor but keep engine running at full  
PTO rpm.  
Streaking conditions in  
swath  
Dull blades.  
Sharpen or replace blades.  
Clean area between skids. Raise cutting height.  
Change blade pairs for correct rotation blades  
Run in or gear failure.  
Wet mud build-up between skid shoes.  
Blade on wrong for rotation of disc  
Rough gears.  
Gearbox noisy  
Worn bearing.  
Replace bearing.  
Damaged oil seal.  
Replace seal.  
Gearbox leaking  
Bent shaft.  
Replace oil seal and shaft.  
Replace seal or use a sealant on OD of seal.  
Drain oil to proper level.  
Oil seal not sealing in housing.  
Oil level too high.  
Gasket damaged.  
Replace gasket.  
Bolts loose.  
Tighten bolts.  
Too much tilt on cutter bar.  
Low PTO speed.  
Reduce tilt.  
Uneven stubble  
Increase engine speed to run PTO at 540 rpm.  
Blades not installed correctly.  
Make sure that arrow on knife upper face is  
pointing in the direction of rotation of the disc.  
Low disc speed.  
Check belt for correct tension.  
Replace blades.  
Dull or broken blades.  
3-point arms not level causing float mechanism to Level three point arms  
not function properly  
Incorrect angle on cutter bar.  
Change cutter bar angle using tractor top link.  
Adjust compensating spring tension.  
Stubble too long  
Insufficient cutter bar down pressure.  
3-point arms not level causing float mechanism to Level three point arms  
not function properly  
Very wet conditions  
Adjust main frame height by shortening safety  
chain as necessary.  
Soil built up in front of  
cutter bar  
Too much cutter bar down pressure  
Adjust compensating spring tension.  
3-point arms not level causing float mechanism to Level three point arms  
not function properly  
Insufficient tension on break-away spring washers. Tighten break-away spring.  
Machine breaking back  
too easily  
3-point arms not level causing float mechanism to Level three point arms  
not function properly  
Belleville washers flattened  
Replace with new Belleville washer part no.  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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9/15/06  
27  
 
Section 8: Appendix  
Section 8: Appendix  
Torque Values Chart for Common Bolt Sizes  
Bolt Head Identification  
Bolt Head Identification  
5.8  
8.8  
10.9  
Bolt Size  
(Inches)  
Bolt Size  
(Metric)  
Grade 2  
Grade 5  
Class 5.8  
Class 8.8  
Class  
Grade 8  
1
3
in-tip  
1/4” - 20  
N · ft-lb N · m ft-lb N · m ft-lb  
mm x N · m ft-lb N · m ft-lb N · m ft-lb  
7.4  
8.5  
15  
5.6  
11  
8
16  
12  
M 5 X 0.8  
4
3
6
5
9
7
1/4” - 28  
5/16” - 18  
5/16” - 24  
3/8” - 16  
3/8” - 24  
7/16” - 14  
7/16” - 20  
1/2” - 13  
1/2” - 20  
9/16” - 12  
9/16” - 18  
5/8” - 11  
5/8” - 18  
3/4” - 10  
3/4” - 16  
7/8” - 9  
6
13  
10  
18  
14  
M 6 X 1  
7
5
11  
8
15  
11  
11  
24  
17  
33  
25  
M 8 X 1.25  
M 8 X 1  
17  
12  
26  
19  
36  
27  
17  
13  
26  
19  
37  
27  
18  
13  
28  
21  
39  
29  
27  
20  
42  
31  
59  
44  
M10 X 1.5  
M10 X 0.75  
M12 X 1.75  
M12 X 1.5  
M12 X 1  
33  
24  
52  
39  
72  
53  
31  
22  
47  
35  
67  
49  
39  
29  
61  
45  
85  
62  
43  
32  
67  
49  
95  
70  
58  
42  
91  
67  
125  
130  
145  
200  
215  
315  
335  
405  
485  
610  
900  
93  
49  
36  
75  
55  
105  
145  
165  
210  
235  
285  
325  
510  
570  
820  
905  
78  
60  
44  
95  
70  
97  
66  
49  
105  
115  
150  
165  
205  
230  
360  
405  
585  
640  
875  
955  
76  
105  
120  
155  
170  
210  
240  
375  
420  
605  
670  
90  
66  
105  
145  
155  
225  
240  
310  
350  
440  
650  
760  
830  
77  
105  
150  
160  
230  
245  
300  
355  
450  
665  
75  
55  
85  
M14 X 2  
92  
68  
105  
115  
165  
180  
230  
260  
325  
480  
560  
610  
95  
70  
110  
120  
150  
170  
265  
295  
430  
475  
645  
705  
M14 X 1.5  
M16 X 2  
99  
73  
105  
130  
150  
235  
260  
225  
250  
340  
370  
480  
540  
680  
750  
890  
79  
145  
155  
195  
220  
280  
310  
480  
525  
960  
105  
115  
145  
165  
205  
230  
355  
390  
705  
97  
M16 X 1.5  
M18 X 2.5  
M18 X 1.5  
M20 X 2.5  
M20 X 1.5  
M24 X 3  
110  
170  
190  
165  
185  
250  
275  
355  
395  
500  
555  
655  
7/8” - 14  
1" - 8  
1050 780  
1150 845  
1230 910  
1350 995  
1750 1290  
1960 1440  
M24 X 2  
1" - 12  
M30 X 3.5  
M30 X 2  
1510 1120 2100 1550  
1680 1240 2320 1710  
1-1/8” - 7  
1 1/8” - 12  
1 1/4” - 7  
1 1/4” - 12  
1 3/8” - 6  
1 3/8” - 12  
1 1/2” - 6  
1 1/2” - 12  
1080 795  
1210 890  
1060 785  
M36 X 3.5  
M36 X 2  
1730 1270 2650 1950 3660 2700  
1880 1380 2960 2190 4100 3220  
1520 1120 2460 1820  
1680 1240 2730 2010  
1990 1470 3230 2380  
2270 1670 3680 2710  
2640 1950 4290 3160  
2970 2190 4820 3560  
1
in-tpi = nominal thread dia. in inches-threads per inch  
N· m = newton-meters  
2
3
4
1010 745  
1180 870  
1330 980  
ft-lb= foot pounds  
mm x pitch = nominal thread dia. in millimeters x thread pitch  
Torque tolerance + 0%, -15% of torquing values. Unless otherwise specified use torque values listed above.  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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28  
9/15/06  
   
Section 8: Appendix  
Warranty  
Land Pride warrants to the original purchaser that this Land Pride product will  
be free from defects in material and workmanship beginning on the date of  
purchase by the end user according to the following schedule when used as  
intended and under normal service and conditions for personal use.  
Overall Unit: 2 Year Parts and Labor  
Driveline: 1 Year Parts and Labor  
Blades and belt: Considered wear items  
This Warranty is limited to the replacement of any defective part by Land Pride  
and the installation by the dealer of any such replacement part, and does not cover  
common wear items such as blades, belts, tines, etc. Land Pride reserves the right  
to inspect any equipment or parts which are claimed to have been defective in  
material or workmanship.  
This Warranty does not apply to any part or product which in Land Pride’s  
judgment shall have been misused or damaged by accident or lack of normal  
maintenance or care, or which has been repaired or altered in a way which  
adversely affects its performance or reliability, or which has been used for a  
purpose for which the product is not designed. Misuse also specifically includes  
failure to properly maintain oil levels, grease points, and driveline shafts.  
Claims under this Warranty should be made to the dealer which originally sold  
the product and all warranty adjustments must be made through an authorized  
Land Pride dealer. Land Pride reserves the right to make changes in materials  
or design of the product at any time without notice.  
This Warranty shall not be interpreted to render Land Pride liable for damages  
of any kind, direct, consequential, or contingent to property. Furthermore, Land  
Pride shall not be liable for damages resulting from any cause beyond its  
reasonable control. This Warranty does not extend to loss of crops, any expense  
or loss for labor, supplies, rental machinery or for any other reason.  
No other warranty of any kind whatsoever, express or implied, is made  
with respect to this sale; and all implied warranties of merchantability and  
fitness for a particular purpose which exceed the obligations set forth in  
this written warranty are hereby disclaimed and excluded from this sale.  
This Warranty is not valid unless registered with Land Pride within 30 days  
from the date of purchase by the end user.  
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M  
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9/15/06  
29  
 
Corporate Office: P.O. Box 5060  
Salina, Kansas 67402-5060 USA  
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