®
BUSH HOG
2426, 2446, 2846 & 3226QT
Front End Loaders
Operator’s Manual
l
l
ASSEMBLY OPERATION MAINTENANCE
707
$4.00
25H49393
2426, 2446, 2846 & 3226 QT
TABLE OF CONTENTS
SECTION/PARA
PAGE
SECTION/PARA
PAGE
Warranty .....................................................3
Dealer Preparation Check List....................4
Safety Precautions......................................5
Federal Laws & Regulations.......................7
IV MAINTENANCE ......................................20
4-1 Maintenance Check List.....................20
4-2 Lubrication..........................................20
4-3 Hydraulic System
Pressure Requirements......................21
4-4 Troubleshooting .................................21
I
INTRODUCTION & DESCRIPTION ...........8
1-1 Introduction...........................................8
1-2 Description............................................8
V ASSEMBLY..............................................23
5-1 Mainframe Assembly..........................23
5-2 Hydraulic Valve Stand Assembly .......25
5-3 Hydraulic Valve Plumbing ..................26
5-4 Power Beyond Plumbing....................27
5-5 Fork Lift Option...................................28
5-6 Bale Spear .........................................28
5-7 Bucket Items ......................................29
Safety Decals ...........................................30
Torque Specifications...............................31
OPTIONAL EQUIPMENT INSTRUCTIONS
Hydraulic Self Leveling
II LOADER MOUNTING & DISMOUNTING.10
2-1 Preparing Tractors..............................10
2-2 Mounting Loader.................................10
2-3 Dismounting Loader ...........................12
III OPERATING INSTRUCTIONS.................13
3-1 General Safety....................................13
3-2 Operation............................................13
3-3 Bale Spear Operation .........................18
3-4 Fork Lift Operation..............................19
3-5 Quick Hitch Operation.........................19
3-6 Transporting........................................19
Cable Control
Selector Valve
Grapple Fork
RETAIL CUSTOMER’S RESPONSIBILITY
UNDER THE BUSH HOG WARRANTY
It is the Retail Customer and/or Operator’s responsibility to read the Operator’s Manual, to
operate, lubricate, maintain and store the product in accordance with all instructions and
safety procedures. Failure of the operator to read the Operator’s Manual is a misuse of this
equipment.
It is the Retail Customer and/or Operator’s responsibility to inspect the product and to have
any part(s) repaired or replaced when continued operation would cause damage or exces-
sive wear to other parts or cause a safety hazard.
It is the Retail Customer’s responsibility to deliver the product to the authorized Bush Hog
Dealer, from whom he purchased it, for service or replacement of defective parts which are
covered by warranty. Repairs to be submitted for warranty consideration must be made
within forty-five (45) days of failure.
It is the Retail Customer’s responsibility for any cost incurred by the Dealer for traveling to or
hauling of the product for the purpose of performing a warranty obligation or inspection.
UNDERSTAND SIGNAL WORDS
DANGER: Indicates an imminently
hazardous situation which, if not avoid-
ed, will result in death or serious injury.
This signal word is to be limited to the
mostextremesituations.
CAUTION: Indicates a potentially haz-
ardous situation which, if not avoided,
may result in minor or moderate injury. It
may also be used to alert against
unsafepractices.
WARNING: Indicates a potentially
hazardous situation which, if not
avoided, could result in death or
serious injury.
2
LIMITED WARRANTY
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
Bush Hog warrants to the original purchaser of any new Bush Hog equipment, purchased from an
authorized Bush Hog dealer, that the equipment be free from defects in material and workmanship for a period
of one (1) year for non-commercial, state, and municipalities’ use and ninety (90) days for commercial use from
date of retail sale. The obligation of Bush Hog to the purchaser under this warranty is limited to the repair or
replacement of defective parts.
Replacement or repair parts installed in the equipment covered by this limited warranty are warranted
for ninety (90) days from the date of purchase of such part or to the expiration of the applicable new equip-
ment warranty period, whichever occurs later. Warranted parts shall be provided at no cost to the user at an
authorized Bush Hog dealer during regular working hours. Bush Hog reserves the right to inspect any equip-
ment or parts which are claimed to have been defective in material or workmanship.
DISCLAIMER OF IMPLIED WARRANTIES & CONSEQUENTIAL DAMAGES
Bush Hog’s obligation under this limited warranty, to the extent allowed by law, is in lieu of all war-
ranties, implied or expressed, INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE and any liability for incidental and consequential damages with respect to
the sale or use of the items warranted. Such incidental and consequential damages shall include but not be
limited to: transportation charges other than normal freight charges; cost of installation other than cost
approved by Bush Hog; duty; taxes; charges for normal service or adjustment; loss of crops or any other loss of
income; rental of substitute equipment, expenses due to loss, damage, detention or delay in the delivery of
equipment or parts resulting from acts beyond the control of Bush Hog.
THIS LIMITED WARRANTY SHALL NOT APPLY:
1. To vendor items which carry their own warranties, such as engines, tires, and tubes.
2. If the unit has been subjected to misapplication, abuse, misuse, negligence, fire or other accident.
3. If parts not made or supplied by Bush Hog have been used in connection with the unit, if, in the sole judge-
ment of Bush Hog such use affects its performance, stability or reliability.
4. If the unit has been altered or repaired outside of an authorized Bush Hog dealership in a manner
which, in the sole judgement of Bush Hog, affects its performance, stability or reliability.
5. To normal maintenance service and normal replacement items such as gearbox lubricant, hydraulic fluid,
worn blades, or to normal deterioration of such things as belts and exterior finish due to use or
exposure.
6. To expendable or wear items such as teeth, chains, sprockets, belts, springs and any other items that in the
company’s sole judgement is a wear item.
NO EMPLOYEE OR REPRESENTATIVE OF BUSH HOG IS AUTHORIZED TO CHANGE THIS LIM-
ITED WARRANTY IN ANY WAY OR GRANT ANY OTHER WARRANTY UNLESS SUCH CHANGE IS MADE
IN WRITING AND SIGNED BY BUSH HOG’S SERVICE MANAGER, POST OFFICE BOX 1039, SELMA,
ALABAMA 36702-1039.
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
purchased. This information will be helpful to your
Record the model number, serial number and date
MODEL NUMBER
dealer if parts or service are required.
SERIAL NUMBER
MAKE CERTAIN THE WARRANTY REGISTRATION
CARD HAS BEEN FILED WITH BUSH HOG/
DATE OF RETAIL SALE
SELMA, ALABAMA
3
DEALER PREPARATION CHECK LIST
2426, 2446, 2846 & 3226 QT LOADERS
BEFORE DELIVERING MACHINE - The following check list should be completed.
Use the Operator’s Manual as a guide.
o Machine properly assembled.
o All safety decals readable. (See decal page)
o All bolts tightened to torque specifications given in torque chart.
o Machine operates properly.
o Customer has appropriate mounting kit for his tractor and loader.
o Customer has appropriate attachments for loader operations. ( Buckets for lifting loose
materials; bale spear for lifting round bales; fork lift for lifting palletized material)
CAUTION
IT IS RECOMMENDED THAT TRACTOR BE
EQUIPPED WITH ROLLOVER PROTECTIVE SYS-
TEM (ROPS) AND SEAT BELT BE USED FOR ALL
LOADER OPERATIONS.
o Operators manual has been delivered to owner and he has been instructed on the safe
and proper use of the front end loader.
Dealer’s Signature
THIS CHECK LIST TO REMAIN IN OPERATOR’S MANUAL
It is the responsibility of the dealer to complete the procedures listed
above before delivery of this implement to the customer.
4
IMPORTANT SAFETY PRECAUTIONS
This symbol is used to call attention to safe-
ty precautions that should be followed by
the operator to avoid accidents. When you
see this symbol, carefully read the message
that follows and heed its advice. Failure to
comply with safety precautions could result
in serious bodily injury.
In addition to the design and configuration of equipment, hazard control and accident prevention are dependent upon the
awareness, concern, prudence and proper training of personnel in the operation, transport, maintenance and storage of
equipment. Lack of attention to safety can result in accident, personal injury, reduction of efficiency and worst of all—loss
of life. Watch for safety hazards and correct deficiencies promptly. Use the following safety precautions as a general
guide to safe operations when using this machine. Additional safety precautions are used throughout this manual for
specific operating and maintenance procedures. Read this manual and review the safety precautions often until you know
the limitations.
THE TRACTOR
1. Read the tractor operator’s manual to learn how to operate your tractor safely. Failure to do so could result in seri-
ous injury or death and equipment damage.
2. It is recommended that tractor be equipped with Rollover Protective System (ROPS) and a seat belt be used for all
loader operations.
3. Add wheel ballast or rear weight for stability.
4. Move wheels to the tractor manufacturer’s widest recommended settings to increase stability.
5. For better stability, use tractor with wide front axle rather than tricycle front wheels.
6. Move and turn the tractor at low speeds.
7. Stop tractor engine, place transmission in park (or neutral), engage parking brake, lower loader arms to ground,
cycle all hydraulic controls to relieve pressure, allow machine moving parts to stop, remove ignition key to prevent
unauthorized person from starting engine before dismounting tractor or servicing, repairing, or making adjustments
to the equipment.
8. Wear personal protective equipment (PPE), such as, but not limited to, protection for eyes, ears, lungs, head, hands
and feet when operating, servicing, or repairing equipment. Avoid wearing loose clothing or jewelry that may catch
and entangle on equipment moving parts.
THE LOADER
1. Read the loader operator’s manual to learn how to operate your loader safely. Failure to do so could result in seri-
ous injury or death and equipment damage.
2. Become familiar with all the machine’s controls and all the caution, warning and danger decals affixed to the
machine before attempting to start or operate.
3. Improper use of a loader can cause serious injury or death.
4. Do not lift or carry anybody on the loader or in the bucket or attachment.
5. Never allow anyone to get under the loader bucket or reach through the booms when the bucket is raised.
6. Do not walk or work under a raised loader bucket or attachment unless it is is securely blocked or held in position
7. Avoid overhead wires and obstacles when loader is raised. Contacting electrical lines can cause electrocution.
8. Make sure all parked loaders on stands are on a hard, level surface.
9. Use a piece of cardboard or wood rather than hands and wear eye protection when searching for hydraulic leaks.
Escaping hydraulic oil under pressure can penetrate skin. If oil is injected into skin, it must be surgically removed
within a few hours by a doctor or gangrene may result.
5
SAFETY PRECAUTIONS CONTINUED
10. Before disconnecting hydraulic lines, relieve all hydraulic pressure.
11. Do not tamper with the relief valve setting. The relief valve is pre-set at the factory. Changing the setting can
cause overloading the loader and tractor and serious operator injury may result.
12. Always wear safety goggles when repairing or servicing machine.
13. When servicing or replacing pins in cylinder ends, buckets, etc., always use a brass drift and hammer. Failure to
do so could result in injury from flying fragments.
14. Replace damaged or illegible safety decals. See decal page for required decals.
15. Do not modify or alter or permit anyone else to modify or alter the loader, any of its components or any loader
function without first consulting your local dealer.
OPERATING THE LOADER
1. It is the loader owner’s responsibility to instruct and have a person read operator’s manual, safety decals and
become familiar with machine controls before allowing them to operate loader.
2. Do not allow children to operate the loader.
3. Before starting or operating the equipment, make a walk around inspection and check for loose or damaged
components. Correct any deficiency before starting.
4. Keep the area of operation clear of all persons, particularly small children. The operator should cease operation
whenever anyone comes within the operating area.
5. Operate the loader from the “Operator’s Seat Only.”
6. Exercise caution when operating the loader with a raised loaded bucket, fork, or large round hay bale handling
attachments.
7. Avoid loose fill, rocks and holes. They can be dangerous for loader operation or movement.
8. Be extra careful when working on inclines.
9. Allow for the loader length when making turns.
10. Stop the loader arms gradually when lowering or lifting.
11. Use caution when handling loose or shiftable loads.
12. Carry loader arms at a low position during transport.
13. Lower loader arms, stop engine, and lock brakes before leaving the tractor seat.
14. Operate the loader controls only when properly seated at the controls.
15. Do not use loader for handling large, heavy objects such as logs, oil drums, etc.
16. Handling large, heavy objects is dangerous due to:
*Possibility of rolling the tractor over.
*Possibility of upending the tractor.
*Possibility of the object rolling or sliding down the loader arms onto the operator.
17. Use large round hay bale handler attachment with bale retaining devices (grapples, bale spears, clamps, etc.) to
handle large round hay bales. Failure to use retaining devices could allow round hay bales to roll or fall down
loader boom arms onto the operator causing serious injury or death and equipment damage.
6
IMPORTANT FEDERAL LAWS AND REGULATIONS* CONCERNING
EMPLOYERS, EMPLOYEES AND OPERATIONS.
*(This section is intended to explain in broad terms the concept and effect of the following federal laws and
regulations. It is not intended as a legal interpretation of the laws and should not be considered as such).
U.S. Public Law 91-596 (The Williams-Steiger Occupational and Health Act of 1970) OSHA
This Act Seeks:
“...to assure so far as possible every working man and woman in the nation safe and healthful working
conditions and to preserve our human resources...”
DUTIES
Sec. 5 (a) Each employer—
(1) shall furnish to each of his employees employment and a place of employment
which are free from recognized hazards that are causing or are likely to cause
death or serious physical harm to his employees;
(2) shall comply with occupational safety and health standards promulgated under
this Act.
(b) Each employee shall comply with occupational safety and health standards
and all rules, regulations and orders issued pursuant to this Act which are
applicable to his own actions and conduct.
OSHA Regulations
Current OSHA regulations state in part: “At the time of initial assignment and at least annually thereafter, the
employer shall instruct every employee in the safe operation and servicing of all equipment with which the
employee is, or will be involved.” These will include (but are not limited to) instructions to:
Keep all guards in place when the machine is in operation;
Permit no riders on equipment;
Stop engine, disconnect the power source, and wait for all machine movement to stop before
servicing, adjusting, cleaning or unclogging the equipment, except where the machine must be
running to be properly serviced or maintained, in which case the employer shall instruct employees
as to all steps and procedures which are necessary to safely service or maintain the equipment.
Make sure everyone is clear of machinery before starting the engine, engaging power, or operating
the machine.
EMPLOYEE TRACTOR OPERATING INSTRUCTIONS:
1. Securely fasten your seat belt if the tractor has a
ROPS.
5. Watch where you are going, especially at row
ends, on roads, and around trees.
2. Where possible, avoid operating the tractor near
ditches, embankments, and holes.
6. Do not permit others to ride.
7. Operate the tractor smoothly - no jerky turns,
starts, or stops.
3. Reduce speed when turning, crossing slopes, and
on rough, slick, or muddy surfaces.
8. Hitch only to the drawbar and hitch points recom-
mended by tractor manufacturers.
4. Stay off slopes too steep for safe operation.
9. When tractor is stopped, set brakes securely and
use park lock if available.
Child Labor Under 16 Years Old
Some regulations specify that no one under the age of 16 may operate power machinery. It is your
responsibility to know what these regulations are in your own area or situation. (Refer to U.S. Dept. of
Labor, Employment Standard Administration, Wage & Home Division, Child Labor Bulletin #102.)
7
SECTION I
INTRODUCTION AND DESCRIPTION
Figure 1-1 Major Components
Hydraulic Hoses
Mainframe Boom
Level Indicator
Bucket Cylinder
Cross Tube
Subframe
Boom Cylinder
1-1 INTRODUCTION
Parking Stands
Bucket
1-2 DESCRIPTION
We are pleased to have you as a Bush Hog cus-
tomer. Your Front End Loader has been carefully
designed to give maximum service with minimum
down time. This manual is provided to give you the
necessary operating and maintenance instructions
for keeping your front end loader in top operating
condition. Please read this manual thoroughly.
Understand what each control is for and how to use
it. Observe all safety precautions decaled on the
machine and noted throughout the manual for safe
operation of implement. If any assistance or addi-
tional information is needed, contact your authorized
Bush Hog dealer.
The Models 2426 and 3226 Front End Loaders are
designed for two wheel drive tractors. The Models
2446 and 2846 Front End Loaders are designed for
two wheel and four wheel drive tractors. They come
equipped with parking stands to support the loader
so the tractor can be “driven in” for quick attachment
and a bucket level indicator that allows operator to
gauge bucket position when the bucket cannot be
seen. Available attachments include buckets for lift-
ing loose materials; a bale spear for lifting round hay
bales; and a fork lift for palletized material. All opera-
tions should be conducted within the loader limits
specified in Table 1-1.
IMPORTANT
This manual covers four different models of front end loaders. There will be minor differences in
configuration and appearance of some components. However, the basic assembly and operation of
the different models will be the same. All references made to right, left, front, rear, top or bottom is as
viewed facing the direction of travel with implement properly attached to tractor.
8
Table 1-1 TECHNICAL SPECIFICATIONS
VV
V
U
D
E
XX
X
A
B
C
J
W
G
ZZ
Z
F
Y
H
SERIES LOADER
2426QT
2446QT
2846QT
3226QT
A. Maximum Lift Height - Measured at Pivot Pin
B. Maximum Lift Height - Under Level Bucket
C. Clearance with Attachment Dumped 45°
D. Reach at Maximum Height
117 in.
108 in.
89 in.
26 in.
50°
117 in.
108 in.
89 in.
31 in.
50°
137 in.
128 in.
109 in.
28 in.
143 in.
134 in.
115 in.
28 in.
E. Maximum Dump Angle
50°
50°
F. Reach with Bucket on Ground
G. Maximum Rollback Angle
62 in.
25°
65 in.
25°
76 in.
73 in.
25°
25°
H. Digging Depth
4.5 in.
59 in.
2990 lbs.
1920 lbs.
4.5 in.
66 in.
2870 lbs.
1985 lbs.
5.5 in.
74 in.
4.5 in.
69 in.
J. Overall Height in Carry Position
U. Lift Capacity to Maximum Height - At Pivot Pin
3560 lbs.
2475 lbs.
4110 lbs.
2800 lbs.
V. Lift Capacity to Maximum Height - 31.5”
Forward of Pivot Pin
W. Lift Capacity to 59” Height - At Pivot Pin
4130 lbs.
3020 lbs.
3220 lbs.
2390 lbs.
4090 lbs.
3105 lbs.
4410 lbs.
3360 lbs.
X. Lift Capacity to 59” Height - 31.5”
Forward of Pivot Pin
Y. Breakout Force - At Pivot Pin
4985 lbs.
3500 lbs.
2400 lbs.
3955 lbs.
2940 lbs.
3155 lbs.
5030 lbs.
3630 lbs.
4420 lbs.
5160 lbs.
3730 lbs.
4940 lbs.
Z. Breakout Force - 31.5” Forward of Pivot Pin
VV. Rollback Force at Maximum Height -
31.5” Forward of Pivot Pin
XX. Rollback Force at 59” Height -
31.5” Forward of Pivot Pin
3340 lbs.
2710 lbs.
3880 lbs.
3015 lbs.
5505 lbs.
4020 lbs.
6865 lbs.
5305 lbs.
ZZ. Rollback Force at Ground Level -
31.5” Forward of Pivot Pin
Raising Time - Ground Level to Full Height
Lowering Time - Full Height to Ground
6 sec.
3 sec.
4 sec.
3 sec.
4 sec.
7 sec.
4 sec.
5 sec.
5 sec.
3 sec.
5 sec.
Bucket Dumping Time - Full Rollback
to Full Dump
3.5 sec.
Bucket Rollback Time - Full Dump
to Full Rollback
2 sec.
2.5 sec.
3 sec.
3 sec.
Tractor HP Range
35 - 75
2 WD
35 - 75
2 & 4 WD
60 - 90
2 & 4 WD
70 - 120
2 WD
Based On Tractor Hydraulic System:
Pressure
Flow
2450 psi
11 gpm
2450 psi
11 gpm
2450 psi
11 gpm
2450 psi
16 gpm
9
SECTION II
LOADER MOUNTING AND DISMOUNTING
2-1 PREPARING TRACTOR
Figure 2-1
CAUTION
TRACTORS THAT HAVE MOVABLE AXLES
MUST BE SET FORWARD IN THE LONG WHEEL-
BASE POSITION AS SHOWN IN FIGURE 2-1 TO
PREVENT EXCESSIVE LEVERAGE BEING
EXERTED ON THE TRACTOR FRAME. FAILURE
TO DO SO CAN RESULT IN PERSONAL INJURY
AND EQUIPMENT DAMAGE. REFER TO TRAC-
TOR OPERATOR’S MANUAL FOR ABOVE PRO-
CEDURES AND SPECIFICATIONS FOR YOUR
TRACTOR.
Short Wheelbase
A. Check air pressure in tractor tires to be sure it
is adequate for heavy loads.
Long Wheelbase
B. Add rear wheel weights, fluid in tires, or equiv-
alent to provide sufficient tractor stability.
C. It is recommended that tractor wheels be
moved to the widest settings.
D. Check tractor hydraulic oil reservoir to be sure
it is full.
B. Connect hydraulic hoses to appropriate tractor
auxiliary outlets. Verify proper connection of hoses
by noting loader and bucket movement per decal on
valve cover. Also control having “float” position
should allow boom to “float” when pushed forward to
detent.
C. Remove pin from front mounting bracket.
Remove cuffs from loader subframe by loosening
nut and removing pin. (Figure 2-2)
E. Refer to your tractor operator’s manual for
above procedures and specifications for your tractor.
2-2 MOUNTING LOADER
A. Slowly drive tractor into loader. (Figure 2-2).
WARNING
LOADER HOSES MUST BE CONNECTED
TO APPROPRIATE TRACTOR AUXIL-
IARY OUTLET. FAILURE TO DO SO CAN
RESULT IN PERSONAL INJURY.
Figure 2-2 Drive In Close Enough To Allow Connecting
Hydraulic Hoses To Tractor Outlets
Front Bracket
Cuff Removed
10
Figure 2-4 Cuff Arrangement
WARNING
LOADER MODELS:
2426 QT, 3226 QT
USE CAUTION WHEN MOUNTING
LOADERS EQUIPPED WITH OPTIONAL
CONTROL VALVE ON TRACTORS
EQUIPPED WITH CANOPY. RAISING
LOADER SUBFRAME TOO HIGH CAN
PINCH HAND BETWEEN CONTROL
HANDLE AND CANOPY CAUSING
INJURY.
Tighten Nut To 100 ft./lbs.
Cuff With Welded-On Bolt
D. With tractor at idle speed, carefully activate
boom cylinders to raise/lower cross tube until it
aligns with front bracket channel.
FIXED
PIVOT PIN
E. Drive tractor forward until cross tube fully
engages front bracket channel and install front
bracket pin. (Figure 2-3)
LOADER MODELS
Figure 2-3
Front Bracket Pin
2446 QT, 2846 QT
Square Head Bolt
Removable
Pin
Tighten Nut To 100 ft./lbs.
Cuff
Figure 2-5
Parking Stand Storage
F. Extend bucket cylinder (dump) until subframe
rest on rear bracket.
G. Install cuff per Figure 2-4 as shown for model
loader being mounted.
H. Tighten nut retaining cuff to 100 ft./lbs.
I. Raise boom, remove parking stands and slide
into loader frame for storage. Retain parking stands
with pins during storage. (Figure 2-5)
WARNING
DO NOT STAND UNDER LOADER WHILE
REMOVING/INSTALLING PARKING STANDS.
Fully Insert Stands And Pin Into Place
11
Cylinder Mounting Bushing
Figure 2-6
J. Secure hydraulic hoses to tractor to prevent
interference. It is recommended that hoses be rout-
ed under tractor operator’s platform.
K. Extend and retract both sets of cylinders
beginning with short strokes. Gradually increase the
length of stroke until cylinders “bottom out” in each
direction. Hold valve open with cylinders “bottomed
out” for 3-5 seconds. This will purge air from
hydraulic components.
2-3 DISMOUNTING LOADER
Dismount loader on firm, level ground to facilitate
the next mounting. It is recommended that loader be
stored in a dry place to prevent rusting.
A. Observe the position of boom cylinder mount-
ing bushing in relation to the subframe. (Figure 2-6)
Remember this position to aid in aligning cross tube
with front bracket when loader is being mounted to
tractor.
B. Remove parking stands from storage. Raise
boom and install as shown in Figure 2-7.
NOTE
When valve control is held open, a squealing noise
will be heard when cylinders ”bottom out” and
hydraulic oil passes through relief valve. This may
cause overheating if valve control is held open
longer than 5 seconds.
Figure 2-7 Parking Stands Installed
Make certain optional control valve operates as
shown on decal . If valve operation is incorrect, see
plumbing diagrams for correct connections.
CAUTION
AIR IN HYDRAULIC COMPONENTS WILL
CAUSE ERRATIC LOADER OPERATION.
PURGE AIR FROM SYSTEM AS
DESCRIBED ABOVE BEFORE WORKING
WITH LOADER. FAIULURE TO DO SO
CAN RESULT IN PERSONAL INJURY
AND EQUIPMENT DAMAGE.
12
C. Lower boom until parking stands contact
ground.
G. With tractor at idle speed, roll bucket back
until subframe raises up off rear bracket.
D. Extend bucket cylinders until cutting edge of
bucket is frimly on the ground.
H. With tractor at idle speed, carefully activate
boom cylinder until cross tube is free of pressure
within front bracket channel. It may be necessary to
roll bucket back further to maintain sufficient clear-
ance between subframe and rear cross tube.
I. Disconnect hydraulic hoses from tractor quick
disconnect couplers.
E. Remove pin from mounting bracket.
Pin
Figure 2-8 Mounting Bracket
J. Carefully back tractor out of loader.
NOTE
When dismounting the 2426 QT from certain tractor
models, additional subframe height is required to
clear the front axle. This may be done by rotating the
subframe back by extending the boom cylinders
once the cross tube is free of the front channel.
K. Reinstall cuffs to loader subframe and place
pin in front mounting bracket for storage.
L. Clean all dirt and debris from loader. Dirt will
hold moisture and cause rust.
M. If loader is to be stored for an extended period
of time, perform lubrication per paragraph 4-2. Also
apply coat of heavy grease to exposed cylinder rods
to prevent rusting.
F. Loosen nut securing cuffs to loader subframe.
Remove pin securing cuff. Remove cuff. (Figure 2-4)
WARNING
USE CAUTION WHEN DISMOUNTING
LOADERS EQUIPPED WITH OPTIONAL
CONTROL VALVE ON TRACTORS
EQUIPPED WITH CANOPY. RAISING
LOADER SUBFRAME TOO HIGH CAN
PINCH HAND BETWEEN CONTROL HAN-
DLE AND CANOPY CAUSING INJURY.
SECTION III
OPERATING INSTRUCTIONS
A bucket level, indicator rod (Figure 3-1) located on
3-1 GENERAL SAFETY
the loader frame can be used to determine bucket
angle. Before beginning work, observe the position
of indicator rod with bucket flat on ground. Raise
boom to several different positions. At each position
level bucket, then observe the indicator rod. Once
familiar with the indicator rod positions, operation of
loader will be easier and more efficient.
Only qualified people familiar with this operator’s
manual should operate this machine. Operator
should wear hard hat, safety glasses, and safety
shoes. The operator should read, understand and
practice all safety messages shown on the caution,
warning and danger decals affixed to the loader to
avoid serious injury or death. It is recommended that
tractor be equipped with Rollover Protective System
(ROPS) and a seat belt be used. Check for ditches,
stumps, holes or other obstacles that could upset
tractor or damage loader. Always turn off tractor
engine, set parking brake, and lower loader to
ground before leaving tractor operator’s seat.
The following text and illustrations offer suggested
loader and tractor operating techniques.
Figure 3-1
Level
Indicator Rod
3-2 OPERATION
The loader should be operated with the tractor
engine running at 1200-1700 rpm. Excessive
speeds are dangerous and may cause bucket
spillage and unnecessary strain on both the trac-
tor and loader.
When operating in temperatures below 30°F (-1°C.),
run the tractor engine below 1200 rpm until the oil
temperature exceeds 30°F.
13
FILLING THE BUCKET
Approach and enter the pile with a level bucket.
...a level bucket throughout the lifting cycle resists
bucket lift and increases breakaway effort.
NOTE; Do not be concerned if the bucket is not com-
pletely filled during each pass. Maximum productivity
is determined by the amount of material loaded in a
given period of time. Time is lost if two or more
attempts are made to fill the bucket on each pass.
Loaders with 1-lever control, ease lever back and
toward you to lift and rollback the bucket.
LIFTING THE LOAD
WARNING
DO NOT LIFT OR CARRY ANYONE IN THE
BUCKET OR ON ANY OTHER PORTION OF
THE LOADER OR LOADER ATTACHMENT.
INADVERTENT MOVEMENT OF THE
LOADER OR ATTACHMENT COULD
RESULT IN SERIOUS INJURY OR DEATH
FROM FALLING OR CRUSHING.
CAUTION
Loaders with 2-lever controls, ease both levers back
to lift and rollback the bucket.
MAKE SURE MATERIAL IN BUCKET CAN-
NOT ROLL OUT AND DOWN ON TRACTOR
WHEN BUCKET IS RAISED TO FULL
HEIGHT. KEEP CLEAR OF OVERHEAD
OBSTRUCTIONS SUCH AS TREES, LIMBS
OR POWER LINES WHEN RAISING THE
BUCKET
When lifting the load, keep the bucket positioned to
avoid spillage.
The lift and rollback of the bucket will increase effi-
ciency because...
CAUTION
DO NOT ATTEMPT TO LIFT BUCKET
LOADS IN EXCESS OF CAPACITIES
LISTED IN TABLE 1-1 TECHNICAL SPECI-
FICATIONS.
14
DUMPING THE BUCKET
CARRYING THE LOAD
Position the bucket as low as possible below the
level of the tractor hood for maximum stability and
visibility, whether the bucket is loaded or empty.
Lift the bucket high enough to clear the side of the
vehicle. Move the tractor in as close to the side of
the vehicle as possible, then dump the bucket.
Use extreme caution when operating the loader on a
slope and keep the bucket as low as possible. This
keeps the bucket and tractor center of gravity low
and will provide maximum tractor stability.
LOWERING THE BUCKET
After the bucket is dumped, back away from the
vehicle while lowering and rolling back the bucket.
CAUTION
FLOAT POSITION
OPERATING THE LOADER ON A HILLSIDE
IS DANGEROUS. EXTREME CARE IS
RECOMMENDED.
DUMP
LOWER
1-LEVER
CONTROL
RAISE
ROLLBACK
FLOAT POSITION
DO THIS
NOT THIS
DUMP
LOWER
When transporting the load, keep the bucket as low
as possible to avoid tipping, in case a wheel drops in
a rut.
2-LEVER
CONTROLS
ROLLBACK
RAISE
NOT THIS
DO THIS
15
OPERATING WITH FLOAT CONTROL
During hard surface operation, keep the bucket level
and put the lift control in the float position to permit
the bucket to float on the working surface. If
hydraulic down pressure is exerted on the bucket, it
will wear faster than normal.
FLOAT
Sidecutting is a good technique for cutting down a
big pile.
The float will also prevent the mixing of surface
material with stockpile material. The float position
will reduce the chance of surface gouging when
removing snow or other material.
If the piles are too high and liable to cause cave-in,
use the loader to break down the sides until a slot
can be cut over the top.
FLOAT
SURFACE MATERIAL
LOADING FROM A BANK
Choose a forward gear that provides sufficient
ground speed for loading
Another method for large dirt piles is to build a ramp
approach to the pile.
Exercise caution when undercutting high banks. Dirt
slides can be dangerous. Load from as low as possi-
ble for maximum efficiency. Loader lift and break-
away capacity diminish as loading height is
increased.
It’s important to keep the bucket level when
approaching a bank or pile. this will help prevent
gouging the work area.
16
PEELING AND SCRAPING
BACKFILLING
6”
Backgrade occasionally with a loaded bucket to
keep the working surface free of ruts and holes.
Hold the lift control forward in float position so the
full weight of the bucket is scraping the ground.
Use only the heel of the bucket while backgrading.
Use a slight bucket angle, travel forward, and hold the
lift control forward to start the cut. Make a short, angle
cut approximately 6” deep and break-out cleanly.
IMPORTANT: To prevent damage to cylinders:
(1) Do not backgrade with bucket cylinders extended.
(2) Always backgrade with valve in float position.
DO THIS
With the bucket level, start a cut at the notch approx-
imately 2” deep. Hold the depth by feathering the
bucket control to adjust the cutting lip up or down.
When the front tires enter the notch, adjust the lift
cylinder to maintain proper depth.
3RD CUT , 4TH CUT, ETC.
Approach the pile with a flat bucket.
Make additional passes until the desired depth is
reached. During each pass, only use the bucket con-
trol while at working depth. This will allow you to
concentrate on controlling the bucket angle to main-
tain a precise cut.
LOADING LOW TRUCKS OR SPREADERS FROM
A PILE
NOT THIS
Poor methods actually move no more dirt and make
it more difficult to hold a level grade.
Do not use the bucket in the dumped position for
bulldozing or backgrading. This method, shown
above, will impose severe shock loadings on the
dump linkage, the bucket cylinder, and the tractor.
For faster loading, minimize the angle of turn and
length of run between pile and spreader.
17
HANDLING LARGE HEAVY OBJECTS
WARNING
Do not use front end loaders for handling
large heavy objects such as logs or oil
drums. Handle large round hay bales only
when loader is equipped with Bush Hog
Bale Spear Attachment.
Handling large heavy objects can be
extremely dangerous due to:
Leave dirt in the bucket because dumping on each
pass wastes time.
H
H
Possibility of rolling the tractor over.
Possibility of upending the tractor.
H Possibility of the object rolling or sliding
DITCH
down the loader arms onto the operator.
3-3 BALE SPEAR OPERATION
The bale spear (Figure 3-2) is intended for handling
large round bales. Before operation, set tractor
wheels to tractor manufacturer’s widest recommend-
ed settings and add ballast as necessary to provide
adequate stability for handling round bales. It is rec-
ommended that tractor be equipped with a ROPS
and seat belts. Approach bale from downhill side
with tractor in low gear. Run spears all the way
into bale with long spear as close to center as
possible. Lift bale just high enough for adequate
ground clearance to transport, maintaining good
visibility. Always carry load as low as possible
when transporting, for improved stability. Use
low gear on downhill grades. Unload round bales on
a level surface.
SOIL PILE
Operate at right angles to the ditch. Take as big a
bite as the tractor can handle without lugging down.
Leave dirt which drifts over the side of the bucket for
final clean-up.
Pile dirt on the high side for easier backfilling on a
slope.
Round Bale
Spear
Quick Hitch
18
3-4 FORK LIFT OPERATION
3-5 QUICK HITCH OPERATION
WARNING
The quick hitch (Figure 3-4) is designed to allow
easy mounting and dismounting of attachments from
loader. With attachment on flat, level surface, mount
as follows:
TO AVOID SERIOUS INJURY OR DEATH:
H NEVER LIFT LARGE ROUND HAY
BALES OR OTHER LOADS ON THE
FORK LIFT ATTACHMENT THAT
COULD ROLL BACK ONTO TRAC-
TOR OPERATOR AREA.
Tilt quick hitch slightly forward at top and slowly
drive into attachment.
H NEVER USE FORK LIFT ATTACH-
MENT TO LIFT OR SUPPORT
PEOPLE.
H TRANSPORT LOADS LOW AND
SLOW.
Hook quick hitch under top cuff on attachment and
lift off ground using boom cylinders only.
Tilt quick hitch backward so that bottom of attach-
ment will swing into position. Release spring-loaded
pins into place behind hitch lug for operation.
H AVOID CONTACT WITH POWER
LINES.
To dismount the attachment:
Tilt quick hitch backward and lift latch pins up and
into notches of bracket.
The fork lift attachment (Figure 3-3) is intended for
handling palletized material. It is recommended that
tractor be equipped with ROPS and seat belts. Use
the loader dump cylinders to give the forks the desired
tilt. Position the forks on their support rods to the
desired width so that the load will be carried approxi-
mately equal on each fork. Position load as far back
as possible.
Tilt hitch forward and lower boom until hitch disen-
gages from top cuffs of attachment.
3-6 TRANSPORTING
When transporting on road or highway, day or night,
use tractor flashing warning lights unless prohibited
by law. Carry load as low as possible maintaining
adequate ground clearance and good visibility.
Reduce tractor ground speed when carrying a load.
Take extra care when traveling over rough terrain or
on slopes.
Figure 3-3
Fork Lift Attachment
CAUTION
WHEN TRANSPORTING A LOAD, KEEP
THE ATTACHMENT AS LOW AS POSSIBLE
TO RESIST TIPPING IN CASE A WHEEL
DROPS IN A RUT.
Adjustable Forks
Figure 3-4 Quick Hitch Attachment
Top Cuffs
Quick Hitch
Hitch Engaging Cuffs
19
SECTION IV
MAINTENANCE
4-1 MAINTENANCE CHECK LIST
4-2 LUBRICATION (Figure 4-1)
Perform scheduled maintenance as outlined below.
Lower machine to ground, turn off tractor, and set
parking brake before doing maintenance inspections
or work. All bolts should be torqued as recommend-
ed in torque chart unless otherwise indicated.
NOTE
The multi-purpose grease referenced in this section
is an NLGI grade 2 type grease.
BEFORE EACH USE
1. Boom Pivot Pins - Apply multi-purpose grease to
each fitting (1 fitting each side)
WARNING
2. Boom Cylinders - Apply multi-purpose grease to
each fitting (2 fittings each cylinder)
3. Bucket Cylinders - Apply multi-purpose grease to
each fitting (2 fittings each cylinder)
THE LOADER CAN FALL FROM
HYDRAULIC SYSTEM FAILURE. TO
AVOID SERIOUS INJURY OR DEATH,
SECURELY SUPPORT LOADER BEFORE
WORKING UNDERNEATH.
4. Bucket Pivot Pin - Apply multi-purpose grease
to each fitting (1 fitting each side)
BEFORE EACH USE
1. Inspect hydraulic lines and fittings for wear or
leaks. Repair or replace if needed.
5. Hydraulic Oil - Cycle boom and bucket cylinders
2 or 3 times before each use, then check
hydraulic oil level in tractor reservoir.
2. Inspect all pivot pins for wear. Make certain clevis
pins and cotter pins are installed to retain each
pivot pin.
3. Check all bolts for tightness.
4. Perform BEFORE EACH USE lubrication per
paragraph 4-2.
5. During operation, listen for abnormal sounds
which might indicate loose parts or other damage.
AFTER EACH USE
1. Clean all debris from machine, especially cylinder
rods and affixed safety decals. Replace any
missing or illegible decals.
CAUTION
USE A PIECE OF CARDBOARD OR
WOOD RATHER THAN HANDS AND
WEAR EYE PROTECTION WHEN
SEARCHING FOR HYDRAULIC LEAKS.
ESCAPING HYDRAULIC OIL UNDER
PRESSURE CAN PENETRATE SKIN. IF
OIL IS INJECTED INTO SKIN, IT MUST BE
SURGICALLY REMOVED WITHIN A FEW
HOURS BY A DOCTOR OR GANGRENE
MAY RESULT.
2. Inspect loader for worn or damaged components.
Repair or replace before next use. Any replace-
ment components installed during repair shall
include the components current safety decals
specified by the manufacturer to be affixed to the
component.
3. Store loader in a dry place.
20
Figure 4-1 Lubrication Points
À
Â
Á
Ä
Ã
4-3 HYDRAULIC SYSTEM PRESSURE
REQUIREMENTS
4-4 TROUBLESHOOTING
Troubleshooting procedures are listed in Table 4-1.
If the problem cannot be solved or replacement
parts are necessary, contact your authorized Bush
Hog dealer. Please have ready your machine name,
model number, serial number, purchase date and
exact cause or description of problem.
A tractor hydraulic system pressure setting of 2500
psi is recommended for maximum efficiency and ser-
vice. Do not exceed 3000 psi as this will damage
components possibly causing serious injury.
The Bush Hog control valve is pre-set at the factory
and should not be adjusted.
21
TABLE 4-1 TROUBLESHOOTING PROCEDURES
PROBLEM
POSSIBLE CAUSE
REMEDY
Loader slow and/or will not dump.
Hydraulic oil to heavy.
Oil filter plugged.
Change to proper oil.
Clean or replace filter.
Hydraulic pump worn.
Oil line restricted or leaking.
Repair or replace pump.
Check all hoses and tubes for leaks,
damage or restrictions. Replace
damaged or restricted hoses or tube lines.
Quick couplers not properly connected. Check connection - Replace if necessary.
Control valve does not shift properly. Inspect clean, repair or replace valve.
Air in hydraulic system.
Cycle lift cylinders and bucket cylinders
several times to free system of air.
Replace seals.
Cylinder leaks internally.
Faulty valve.
Repair or replace valve.
Loader chatters or vibrates when
raising or lowering.
Air in hydraulic system.
Cycle lift cylinders and bucket cylinders.
Oil level too low.
Add oil as required.
Oil leaks.
Damaged fittings or hoses.
Loose connections.
Replace damaged parts.
Tighten fittings.
Worn or damaged O-ring or
wiper seal in cylinder rod end.
Worn or damaged O-rings in
valve.
Install a seal repair kit.
Install an O-ring repair kit.
Insufficient lift capacity.
Load is greater
Check loader specifications.
Check tractor system.
than boom lift capacity.
Internal boom cylinder leakage.
Replace any worn parts and install a seal
repair kit.
Improper hydraulic valve
operation.
Repair or replace valve.
Slow leakdown.
Worn control valve.
Have authorized Bush Hog dealer replace
seals.
Worn cylinder piston seals.
Have authorized Bush Hog dealer replace
seals.
Excessive wear on bottom of bucket
and wear pads.
Float position not used while
operating loader.
Use float position provided on valve.
Hydraulic cylinders inoperative.
Hose from control valve improperly
connected.
Refer to plumbing diagrams in Section V.
Pump operating continually on closed
center tractor hydraulic system.
Hydraulic control valve relief stuck
open.
See your tractor manual for proper adjust-
ment or Bush Hog dealer for loader valve.
(3000 PSI is maximum pressure relief
setting recommended)
Hydraulic control valve relief set
too low.
Loader lift and bucket tilt controls do not work
according to decal.
Hoses improperly connected.
Refer to plumbing diagrams in Section V
and correct hose connections.
Valve noisy and/or hot.
Open center control valve on
closed center tractor.
Install closed center plug on optional valve.
Tractor loads/pump squeals.
Closed center control valve on open
center tractor.
Install open center plug on optional valve.
22
SECTION V
ASSEMBLY
CAUTION
12. Before operating the machine, thoroughly read
the operation section of this manual.
THE FOLLOWING SAFETY PRECAUTIONS
SHOULD BE THOROUGHLY UNDER-
STOOD BEFORE ATTEMPTING MACHINE
ASSEMBLY.
13. Before operating, read the maintenance section
of this manual to be sure that any parts requiring
lubrication such as gearboxes are full to avoid
any possible damage.
1. Do not lift heavy parts or assemblies. Use crane,
jack, tackle, fork trucks, or other mechanical
devices.
14. Wear personal protective equipment such as,but
not limited to, protection for eyes, ears, feet,
hands, lungs and head when assembling the
equipment. Do not wear loose clothing or jewelry
that may catch on equipment moving parts.
2
Select an area for assembly that is clean and
free of any debris which might cause persons
working on the assembly to trip.
BEFORE OPERATING THE EQUIPMENT, IF YOU
HAVE ANY QUESTIONS REGARDING THE PROP-
ER ASSEMBLY OR OPERATION, CONTACT
YOUR AUTHORIZED BUSH HOG DEALER OR
REPRESENTATIVE.
3. Arrange parts to be assembled neatly in the work
area and have tools or other mechanical assist
ing devices in easy reach.
4. Inspect all parts and assemblies thoroughly and
remove any sharp edges, grease, oil, or dirt
which might cause pieces to slip when handling.
5-1 MAINFRAME ASSEMBLY
BE SURE ALL STEPS ARE COMPLETED IN SUP-
PLEMENTAL BRACKET INSTRUCTIONS
BEFORE BEGINNING FINAL ASSEMBLY.
5. Preview the assembly instructions in your opera
tor’s manual before proceeding further.
A. Bolt the front mount, side mounts and cross
tube (some models do not require cross tubes) to
the tractor according to the supplemental instruc-
tions furnished with the mounting kit.
B. Attach level indicator rod guide to right hand
side of boom using 1/4” bolt and flat washers as
shown in Figure 3-1. Do not tighten so as to prevent
indicator rod from pivoting.
C. Slide indicator rod through guide and secure
other end to outside of quick hitch with 1/2” locknut
and washers. Check to ensure that indicator rod will
pivot freely.
D.Install elbow fitting (supplied in bag of hard-
ware) to the rod end of each bucket cylinder and
attach corresponding hoses.
6. If the assembly instructions call for parts or
assemblies to be blocked up, use only blocking
material that is in good condition and is capable
of handling the weight of the assembly to be
blocked. Also insure that the blocking material is
on a clean, dry surface.
7. Never put hands on any other part of body under
blocked up assemblies if at all possible.
8. Always wear goggles or safety glasses when
hammering, grinding or drilling metal parts.
9. If the assembly calls for welding or cutting, be
sure that there are no flammable materials close
at hand and that bystanders have taken neces-
sary precautions.
E. Raise rear of loader to install parking stands
as shown.(Figure 5-1)
AFTER COMPLETING ANY ASSEMBLY
STEP,THOROUGHLY READ THE NEXT STEP IN
THE ASSEMBLY INSTRUCTIONS BEFORE PRO-
CEEDING WITH THAT STEP.
CAUTION
INSURE THAT METHOD OF RAISING
THE FRAME ASSEMBLY PROVIDES
SECURE SUPPORT AT ALL TIMES TO
PREVENT IT FALLING ONTO FEET,
HANDS, ETC.
10. After completing assembly, thoroughly inspect
the machine to be sure that all nuts, bolts,
hydraulic fittings or any other fastened assem-
blies have been thoroughly tightened.
11. After completing assembly, be sure that all safety
locking devices or guards are in place.
23
Figure 5-3 Cuff Arrangements
Figure 5-1 Parking Stands Installed
LOADER MODELS
2426 QT, 3226 QT
Subframe
Cuff With Welded-On Bolt
Fixed
Pivot Pin
Subframe
LOADER MODELS
2446 QT, 2846 QT
F. Connect hydraulic hoses to loader as shown in
Figure 5-2. If optional hydraulic valve is used, refer
to paragraphs 5-2 and 5-3 for valve and stand
assembly instructions.
G. Install cuffs, pins, washers, bolts, and nuts as
shown depending on your particular model loader.
(Figure 5-3)
Removable
Pin
Square Head Bolt
Cuff
Figure 5-2 Tractor Hydraulic Kit
(4) Hoses
NOTE:
HOSES COMING FROM MAINFRAME ARE
Straight Adaptor
COLOR CODED FOR IDENTIFICATION.
Red - Rod End of Lift Cylinder
Blue - Head End of Lift Cylinder
Green - Head End of Bucket Cylinder
Yellow - Rod End of Bucket Cylinder
3/4”- 16 JIC Threads
Mainframe
1/2” NPT to 3/4” JIC
To Tractor Outlets Through Quick Couplers
(Not Supplied)
24
Figure 5-4 Valve Stand Assembly
Optional
Mounting Bracket
Operational
Decal
Shield
1/2 x 1-1/2”
3/8 x 1-1/4”
5/8 x 6-1/2”
(2)
5/16 X 2-1/2”
5/16 X 3”
5/16 x 3”
Mounting Bracket
1/2 X 3”
Valve
Plate
1/2 X 1-1/2”
5/16 X 1”
Tube
5/8 X 6-1/2”
Mounting Plate
Optional Brace
C. Attach mounting tube to bracket using 1/2 x 3”
bolts, lockwashers and nuts. The slotted hole also
requires a flatwasher, as shown.
5-2 OPTIONAL HYDRAULIC VALVE
STAND ASSEMBLY (Figure 5-4)
D. Attach valve plate to tube using U-bolts, lock-
washers and nuts. Note: Mounting tube may be
too long for tractor being mounted and should be
cut to desired length.
A. Attach mounting plate to loader frame using
two 5/8 x 5-1/2” bolts, flatwashers, lockwashers and
nuts. Note that this plate may be rotated 180° to
allow three different mounting tube heights.
B. Attach mounting bracket to plate using two 1/2
x 1-1/2” bolts, lockwashers and nuts.
25
D. Remove open center plug.
5-3 OPTIONAL HYDRAULIC VALVE
PLUMBING INSTRUCTIONS
E. Install the closed center plug furnished with
valve. Note: When converting to closed center con-
figuration open center plug is removed from valve
and installed in sleeve of closed center plug assem-
bly.
A. Mount valve assembly to valve plate using fas-
ten ers provided.
B. Plumb valve as shown in Figure 5-5.
C. This valve is set for an open center tractor
hydraulic system. If tractor has a closed center
hydraulic system, a closed center plug must be
installed.
F. Install valve operational decal on valve shield.
HOSE COLOR CODES
Figure 5-5 Walvoil Hydraulic Control Valve
Red - Rod End of Lift Cylinder
Green - Head End of Bucket
Blue - Head End of Lift Cylinder
7/8” ORB to 3/4” JIC
Yellow - Rod End of Bucket
NOTE:
When converting to closed
center configuration open
center plug is removed
from valve and installed in
sleeve of closed center
plug assembly.
Note: Single handle control shown.
Dual handle control plumbs the same
as shown.
Open Center Plug
Closed Center/Power Beyond Plug
To Presure Outlet
NOTES:
1. When attaching a loader valve to the
rear remotes of the tractor, a power beyond
kit is not required. (Figure 5-6) A power
beyond kit MUST be used when attaching a
loader valve to a hydraulic source other
than to the rear remotes of a tractor having
an OPEN center hydraulic system.
To Return Inlet
2. A power beyond kit is NOT required on
tractors with a CLOSED center hydraulic
system. The loader valve may be attached
to the tractor at the rear remotes or, at
another hydraulic source recommended by
the tractor manufacturer.
90° Elbow 1/2” NPT to 3/4” JIC
Attach Quick Couplers to these fittings.
(Quick couplers not supplied in kit.)
3. If Power Beyond System is used, refer to
basic Power Beyond plumbing instructions
on the following page. (Figure 5-6)
4. If the tractor has a Pressure Flow
Compensated System (PFC) - the loader
valve MUST be connected to the TRACTOR
REMOTES.
26
5-4 BASIC POWER BEYOND PLUMBING
INSTRUCTIONS
IMPORTANT
When loader hydraulics are disconnected
from tractor hydraulics, hoses A & B must
be connected to complete tractor hydraulic
circuit. FAILURE TO DO THIS WILL CAUSE
SERIOUS DAMAGE TO TRACTOR
HYDRAULIC SYSTEM.
Open Center
Plug
Figure 5-6
Power Beyond
Plug
NOTE
More detailed assembly instructions are furnished
with individual Power Beyond Kits.
B
C
These hoses to
be furnished by
dealer.
A
27
5-5 FORK LIFT OPTION
Insert fork support rods through main frame and fork
tubes. Secure in place with nuts and bolts provided.
Fork
Support Rod
Bolt & Nut
Mainframe
5-6 BALE SPEAR OPTION
Insert spears into frame and fasten with roll pins and
eccentric nut as shown. Torque nut to 470 - 505
ft./lbs. Tapered side of nut must be assembled against
frame.
Eccentric Nut
Frame Assembly
Long Spear
Roll Pins
Short Spears
28
5-7 OPTIONAL BUCKET ITEMS ASSEMBLY
SPILL GUARD ATTACHMENT
SPILL GUARD
1. Place spill guard on bucket & center.
2. Mark hole centers for attaching fasteners. Allow
clearance for side cutting edges on bolts in side
plates if necessary.
3. Remove spill guard and drill 9/16” holes. Install spill
1/2 x 1-1/2” Bolt,
Lockwasher & Nut
9/16” Holes (7Places)
SIDE CUTTING EDGES
1/2 x 1” Bolt & Locknut
DIGGING TEETH
Bushings
3/8 X 2-1/2” Bolt,
Lockwasher & Nut
1/2 X 1-1/2” BOLT
3/8” U-BOLT
TINE TEETH
Lockwashers & Nuts
29
SAFETY DECALS
To promote safe operation, Bush Hog supplies safety decals on all products manufactured. Because damages
can occur to safety decals either through shipment, use or reconditioning, Bush Hog will, upon request, provide
safety decals for any of our products in the field at no charge. Contact your authorized Bush Hog dealer for
more information.
REAR VIEW OF
SUBFRAME
Decals 25H46070, 25H46071, 25H46010
Ô Ô Ô
and 25H46012 are located on the left side of
the subframe. Other decals are located on
attachments (Bucket, Fork Lift, Bale Spear).
25H46071
79104
79103
62779
25H46010
25H46070
25H46012
30
TORQUE SPECIFICATIONS
Proper toque for American fasteners used on Bush Hog equipment.
Recommended Torque in Foot Pounds (Newton Meters).*
AMERICAN
Bolt Head Markings
B O LT D IA M ETER
(IN .) “B ” A N D
TH R EA D SIZE
W R EN C H
SIZE (IN .) “A ”
SA E
G R A D E 2
SA E
G R A D E 5
SA E
G R A D E 8
7/16
7/16
1/4 - 2O UNC
1/4 - 28 UNF
5/16 - 18 UNC
5/16 - 24 UNF
3/8 - 16 UNC
3/8 - 24 UNF
7/16 - 14 UNC
7/16 - 20 UNF
1/2 - 13 UNC
1/2 - 20 UNF
9/16 - 12 UNC
9/16 - 18 UNF
5/8 - 11 UNC
5/8 - 18 UNF
3/4 - 10 UNC
3/4 - 16 UNF
7/8 - 9 UNC
6 (7)
8 (11)
10 (13)
12 (16)
14 (18)
6 (8)
1/2
11 (15)
17 (23)
25 (33)
SAE Grade 2
(No Dashes)
1/2
13 (17)
19 (26)
27 (37)
9/16
20 (27)
31 (42)
44 (60)
9/16
23 (31)
35 (47)
49 (66)
5/8
32 (43)
49 (66)
70 (95)
5/8
36 (49)
55 (75)
78 (106)
3/4
49 (66)
76 (103)
106 (144)
120 (163)
153 (207)
172 (233)
212 (287)
240 (325)
376 (509)
420 (569)
606 (821)
668 (905)
909 (1232)
995 (1348)
1019 (1381)
1288(1745)
1444 (1957)
1817 (2462)
2013 (2728)
2382 (3228)
2712 (3675)
3161 (4283)
3557 (4820)
3/4
55 (75)
85 (115)
7/8
70 (95)
109 (148)
122 (165)
150 (203)
170 (230)
266 (360)
297 (402)
430 (583)
474 (642)
644 (873)
705 (955)
721 (977)
795 (1077)
890 (1206)
1120 (1518)
1241 (1682)
1470 (1992)
1672 (2266)
1950 (2642)
2194 (2973)
7/8
79 (107)
97 (131)
110 (149)
144 (195)
192 (260)
166 (225)
184 (249)
250 (339)
274 (371)
280 (379)
354 (480)
397 (538)
500 (678)
553 (749)
655 (887)
746 (1011)
870 (1179)
979 (1327)
SAE Grade 5
(3 Dashes)
15/16
15/16
1-1/8
1-1/8
1-5/16
1-5/16
1-1/2
1-1/2
1-1/2
1-11/16
1-11/16
1-7/8
1-7/8
2-1/16
2-1/16
2-1/4
2-1/4
7/8 - 14 UNF
1 - 8 UNC
1 - 12 UNF
Wrench
Size “A”
1 - 14 UNF
SAE Grade 8
(6 Dashes)
1-1/8 - 7 UNC
1-1/8 - 12 UNF
1-1/4 - 7 UNC
1-1/4 - 12 UNF
1-3/8 - 6 UNC
1-3/8 - 12 UNF
1-1/2 - 6 UNC
1-1/2 - 12 UNF
Proper torque for metric fasteners used on Bush Hog equipment.
Recommended torque in foot pounds (newton Meters).*
METRIC
—WRENCH
SIZE
BOLT
DIA.
ASTM
4.6
ASTM
8.8
ASTM
9.8
ASTM
10.9
(mm) “A”
(mm) “B”
8
5
1.8 (2.4)
3 (4)
5.1 (6.9)
8.7 (12)
21.1 (29)
42 (57)
6.5 (8.8)
11.1 (15)
27 (37)
10
13
16
18
21
24
30
33
36
41
46
6
8
7.3 (10)
14.5 (20)
25 (34)
40 (54)
62 (84)
122 (165)
Wrench
Size “A”
10
12
14
16
20
22
24
27
30
53 (72)
8.8
74 (100)
118 (160)
167 (226)
325 (440)
443 (600)
563 (763)
821 (1112)
1119 (1516)
73 (99)
93 (126)
116 (157)
181 (245)
148 (201)
230 (312)
449 (608)
611 (828)
778 (1054)
1138 (1542)
1547 (2096)
Numbers appearing on bolt heads
indicate ASTM class.
211 (286)
418 (566)
*U se 75% of the specified torque value for
plated fasteners. U se 85% of the speci-
fied torque values for lubricated fasteners.
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