®
BUSH HOG
Gasoline Trailed
Rotary Cutter
MODEL
GT 4 8
Operator’s Manual
ASSEMBLY ꢀꢀOPERATION ꢀꢀMAINTENANCE
600
$4.00
50027657
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GT 48
Operator’s Manual
TABLE OF CONTENTS
SECTION/PARA
PAGE
SECTION/PARA
PAGE
III MAINTENANCE . . . . . . . . . . . . . . . . . . . .12
3-1 Maintenance Check List . . . . . . . . . .12
3-2 Belt Adjustment . . . . . . . . . . . . . . . . .12
3-3 Belt Replacement . . . . . . . . . . . . . . .12
3-4 Hub Bearing Replacement . . . . . . . .13
3-5 Blade Replacement . . . . . . . . . . . . . .13
3-6 Troubleshooting . . . . . . . . . . . . . . . . .13
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . .2
Dealer Preparation Check List . . . . . . . . .3
Safety Symbols . . . . . . . . . . . . . . . . . . . . .4
Safety Precautions . . . . . . . . . . . . . . . . . .5
Federal Laws and Regulations . . . . . . . . .7
I
INTRODUCTION AND DESCRIPTION . .8
1-1 Introduction . . . . . . . . . . . . . . . . . . . . .8
1-2 Description . . . . . . . . . . . . . . . . . . . . .8
IV DEALER ASSEMBLY . . . . . . . . . . . . . . .14
4-1 Base Unit Assembly . . . . . . . . . . . . . .15
4-2 Electric Start Connection . . . . . . . . . .16
4-3 Optional Front Roller Installation . . . .17
4-4 Optional Rear Roller Installation . . . .17
4-5 Optional Bumper Guard Installation . .17
4-6 Optional Offset Tongue Installation . .17
II OPERATION . . . . . . . . . . . . . . . . . . . . . . .9
2-1 General Safety . . . . . . . . . . . . . . . . . .9
2-2 Attaching To Towing Vehicle . . . . . . . .9
2-3 Cutting Height Adjustment . . . . . . . . . .9
2-4 Electric Start Control Box Mounting . .10
2-5 Engine Starting . . . . . . . . . . . . . . . . .10
2-6 Cutting . . . . . . . . . . . . . . . . . . . . . . . .11
2-7 Engine Shutdown . . . . . . . . . . . . . . . .11
Safety Decals . . . . . . . . . . . . . . . . . . . . . .18
Torque Specifications . . . . . . . . . . . . . . . .19
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 excessive 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 travel-
ing to or hauling of the product for the purpose of performing a warranty obligation or
inspection.
1
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®
BUSH HOG
LIMITED WARRANTY
✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯
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.
✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯
Record the model number, serial number and date
purchased. This information will be helpful to your
dealer if parts or service are required.
MODEL NUMBER
SERIAL NUMBER
MAKE CERTAIN THE WARRANTY REGISTRATION
CARD HAS BEEN FILED WITH BUSH HOG/
SELMA, ALABAMA
DATE OF RETAIL SALE
2
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DEALER PREPARATION CHECK LIST
GT 48 Rotary Cutter
BEFORE DELIVERING MACHINE — The following check list should be completed.
Use the Operator’s Manual as a guide.
ASSEMBLY
❒ 1. Axle assembly
❒ 2. Tongue assembly
❒ 3. Throttle assembly
ENGINE SERVICE (Refer to Engine Owner’s Manual)
❒ 1. Oil reservoir filled
❒ 2. Gas tank filled
GENERAL
❒ 1. All shields in place
❒ 2. All safety decals legible (If damaged, Bush Hog will
furnish free upon request)
❒ 3. All bolts tight (Including blade bolts)
❒ 4
.
Machine operates properly
❒ 5. Overall condition good
❒ 6. Operator’s Manual and Engine Manual was delivered to owner, and he has
been instructed on the safe and proper use of cutter.
❒ 7. Kill switch cord included
Dealer’s
Signature
Purchaser’s
Signature
THIS CHECKLIST TO REMAIN IN OWNER’S MANUAL
It is the responsibility of the dealer to complete the procedures listed
above before delivery of this implement to the customer.
3
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Safety Alert Symbol
This Safety Alert Symbol means: “ATTENTION! BECOME ALERT!
YOUR SAFETY IS INVOLVED!”
This symbol is used to call attention to safety
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 safe-
ty precautions could result in death or serious
bodily injury.
Safety Signs Signal Words
The signal words DANGER, WARNING, AND CAUTION are used on the equipment safety signs. These words
are intended to alert the viewer to the existence and the degree of hazard seriousness.
This signal word indicates a potentially hazardous situation
which, if not avoided, will result in death or serious injury.
DANGER
White letters on RED
This signal word indicates a potentially hazardous situation
which, if not avoided, could result in death or serious injury
WARNING
It may also be used to alert against unsafe practices.
Black letters on ORANGE
This signal word indicates a potentially hazardous situation exist
which, if not avoided, may result in minor or moderate injury.
CAUTION
It may also be used to alert against unsafe practices.
Black letters on YELLOW
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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 death or serious bodily injury.
In addition to the design and configuration of equipment, hazard control and accident prevention are depen-
dent 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 prompt-
ly. 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 proce-
dures. Read this manual and review the safety precaution information often until you know the limitations.
1. Read the Operator’s Manual. (Persons who cannot read must have the information explained) Failure
to read the Operator’s Manual is considered a misuse of this equipment.
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. Before starting or operating the machine, make a walk around inspection and check for obvious
defects such as loose mounting bolts and damaged components. Correct any deficiency before
starting.
4. Do not allow children to operate the cutter. Do not allow adults to operate it without proper instruction.
5. Do not carry passengers.
6. Keep the area of operation clear of all persons, particularly small children and pets. The operator
should cease mowing whenever anyone comes within the operating area.
7. Clear the work area of objects which might be picked up and thrown.
8. Stop the cutter engine, towing vehicle engine, and set towing vehicle parking brake before leaving
operator’s position.
9. Stop the cutter engine, towing vehicle engine, disconnect spark plug wire, set towing vehicle brake,
and listen to make certain cutter blade has stopped rotating before making any repairs or adjustments.
10. Stop cutter engine when transporting or not in use.
11. Take all possible precautions when leaving the vehicle unattended, such as shifting into neutral, setting
the parking brake, stopping both engines and removing the key.
12. Do not stop, start or turn suddenly when going uphill or downhill. Mow up and down the face of
slopes, never across the face.
13. Reduce speed and exercise extreme caution on slopes and in sharp turns to prevent tipping or loss of
control. Be especially cautious when changing direction on slopes.
14. Stay alert for holes, rocks, stumps and roots in the terrain and other hidden hazards.
15. Use only approved drawbar hitch points.
16. Do not turn sharply. Use care when backing.
17. Use counterweight(s) or wheel weights when suggested in the towing vehicle owner’s manual.
18. Handle gasoline with care - it is highly flammable.
A. Use approved gasoline container.
B. Never remove the fuel cap of, or add gasoline to, a running or hot engine, or fill the fuel tank indoors.
Wipe up spilled gasoline.
C. Open doors if the engine is running in the garage - exhaust fumes are dangerous. Do not run the
engine indoors.
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19. Keep the towing vehicle and cutter in good operating condition and keep safety devices in place.
20. Keep all nuts, bolts and screws tight to be sure the equipment is in safe working condition.
21. Never store the equipment with gasoline in the tank inside a building where fumes may reach an open
flame or spark. Allow the engine to cool before storing in any enclosure.
22. To reduce fire hazard, keep the engine free of grass, leaves or excessive grease.
23. Do not change the engine governor settings or overspeed the engine.
24. Mow only in daylight or in good artificial light.
25. Never adjust height or leveling linkage while the engine is running.
26. Check the blade mounting bolts for proper tightness at frequent intervals.
27. Stop cutter engine before backing up. Do not cut in reverse unless absolutely necessary and then only
after careful observation of the entire area behind the mower.
28. Do not operate the equipment when barefoot or wearing open sandals. Always wear substantial
footwear.
29. Stop the cutter engine and watch out for traffic when crossing gravel drives, walks or roads.
30. After striking a foreign object, stop the cutter engine, remove the wire from the spark plug, thoroughly
inspect the cutter for any damage and repair the damage before restarting and operating.
31. If the cutter should start to vibrate abnormally, stop the engine and check immediately for the cause.
Vibration is generally a warning of trouble.
32. Never operate the cutter without proper guards, plates or other safety protective devices in place.
33. Wear personal protective equipment such as, but not limited to, protection for eyes, ears, feet, hands
and head when operating or repairing the equipment. Do not wear loose clothing or jewelry that may
catch on equipment moving parts.
6
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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.)
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SECTION I
INTRODUCTION AND DESCRIPTION
attaches to the towing vehicle drawbar using a ball
1-1 INTRODUCTION
hitch and pin. The 48”, uplift blade bar assembly will
cut pasture grass and weeds up to 3/4” diameter.
This model rotary cutter is not meant for precision
yard mowing or heavy brush cutting.
We are pleased to have you as a Bush Hog cus-
tomer. Your Model GT 48 Rotary Cutter 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 rotary cutter in top
operating condition. Please read this manual thor-
oughly. 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. The information must
be explained to those users or operators who cannot
read. If any assistance or additional information is
needed, contact your authorized Bush Hog dealer.
The cutter is powered by a vertical shaft, gasoline
engine. Belt drive transfers power from the engine
through a centrifugal clutch to the blade. Optional
front and/or rear rollers may be installed to help pre-
vent scalping on uneven terrain.
Table 1-1 Technical Specifications
Cutting Width . . . . . . . . . . . . . . . . . . . . . . . . . . . .48”
Transport Width . . . . . . . . . . . . . . . . . . . . . . . . . .64”
Cutting Height . . . . . . . . . . . . . . . . . . . . . . . . .1” - 6”
Cutting Capacity . . . . . . . . . . . . . . . . . .3/4” Diameter
Type Hitch . . . . . . . . . . . . . . . . . .Swivel Ball and Pin
Deck Thickness . . . . . . . . . . . . . . . . . . . . . 11 Gauge
Wheels . . . .13” x 5” Rib Solid Tire or 13.5” x 6” High
Flotation Pneumatic
NOTE
All references made to right, left, top, bot-
tom, front or rear are as viewed facing the
direction of travel with implement properly
attached to towing vehicle.
Drive . . . . . . . . . . . . . . . V-Belt, Kevlar Construction
Weight . . . . . . . . . . . . . . . . . . .425 lbs. With Wheels
Engine . . . . . . . . . . . . . . . . . . . . . . . .13 H.P. Honda
Blade Tip Speed . . . . . . . . . . . . . . . . . . .16,450 fpm
1-2 DESCRIPTION
The GT 48 Rotary Cutter is equipped with a 13 H.P.
Honda engine with electric start and spark arrestor.
It is designed primarily for use with 4 wheeled, all
terrain vehicles (ATVs) and garden tractors. It
NOTE: Electric start runs off ATV electrical system.
Figure 1-1
13 H.P. Engine
Cutting Height Adjustment
Leveling Rod
Belt Adjustment Bolt
Swivel Ball Hitch
Tongue
Deck Enclosed Side
Axle Assembly with
Pneumatic Tires
8
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SECTION II
OPERATION
2-1 GENERAL SAFETY
Figure 2-1
Only qualified people familiar with this operator’s
manual information should operate this machine.
Operator should wear hard hat, safety glasses and
safety shoes. Before beginning operation, clear work
area of any objects that may be picked up and
thrown. Check for ditches, stumps, holes or other
obstacles that could upset tractor or damage cutter.
Always stop cutter engine before crossing driveways,
walkways, roads or gravel areas. Before leaving
operator’s seat turn off cutter engine and towing
vehicle, set parking brake and wait for blade to come
to a complete stop.
Linch Pin
Swivel Ball Hitch
Rubber Washer
Hitch Pin
WARNING
TO AVOID SERIOUS INJURY OR DEATH
ALWAYS STOP CUTTER ENGINE BEFORE
ATTACHING, DETACHING, OR MAKING
ANY ADJUSTMENT.
2-2 ATTACHING TO TOWING VEHICLE
A. Turn off engine and set parking brake of towing
vehicle.
B. Attaach hitch pin to towing vehicle drawbar as
shown in Figure 2-1.
C. Slide rubber washer and mower swivel ball
hitch onto hitch pin and secure with lynch pin.
2-3 CUTTING HEIGHT ADJUSTMENT
The cutter should be operated at the highest position
which will give desired cutting results. This will help
prevent blade from striking the ground, reducing
blade wear and undue strain on the machine. For
best results under heavier cutting conditions, always
tilt the cutter so front is approximately 2 inches lower
than rear. This tilt decreases horsepower require-
ments and increases potential ground speed. When
fine shredding is desired, adjust cutter deck level.
This will keep the foliage under cutter until thorough-
ly shredded. More power is required for shredding.
Figure 2-2
Cutting Height
Adjustment Handle
CAUTION
TILTING CUTTER WILL INCREASE THE
POSSIBILITY OF A THROWN OBJECT.
The cutting height is adjustable from 1 to 6 inches.
Adjustment is made by turning handle shown in
Figure 2-2.
The forward to rear tilt (slope) of the deck is adjusted
with the leveling rod. Remove bolt securing leveling
rod to axle. (Figure 2-3). Position cutter deck as
desired. Adjust end of rod in or out as necessary to
reconnect to axle. Fasten with bolt and nut until nut
is snug, not tight.
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Figure 2-3 Leveling Adjustment Rod
Figure 2-4 Control Box Mounted On ATV Rack
Figure 2-4 A
Control Box Assy.
2-4 ELECTRIC START CONTROL BOX
MOUNTING
A. Attach mounting bracket to ATV rack using U-
bolt. (Figure 2-4, 2-4A and Figure 4-2)
B. Mount control box to mounting bracket by
inserting quarter-turn fasteners into clip-on recepta-
cle and turn 90 degrees.
Quqrter-turn
Fastener
C. Disconnect battery pigtail from wiring harness.
Mounting Bracket
U-Bolt
DANGER
FAILURE TO DISCONNECT BATTERY PIG-
TAIL FROM WIRING HARNESS BEFORE
CONNECTING TO BATTERY IS EXTREME-
LY DANGEROUS. A WIRE TOUCHED TO
THE WRONG TERMINAL COULD CAUSE A
SPARK AND SUBSEQUENT BATTERY
EXPLOSION.
A. Perform BEFORE EACH USE maintenance
listed in paragraph 3-1.
B. Install kill switch plug. (Figure 2-5)
C. Open fuel valve.
D. Push throttle to CHOKE position. If engine is
warm, place throttle in SLOW position.
DANGER
D. Connect white wire from battery pigtail to nega-
tive terminal on battery. (Figure 4-2) Connect red
wire to positive terminal.
E. Plug pigtail into wiring harness, If a spark is
created when connection is made, disconnect imme-
diately. Check to be sure all wires are connected
properly.
KEEP HANDS AND FEET AWAY FROM
UNDERNEATH CUTTER TO AVOID SERIOUS
INJURY. FOR MANUAL CRANKING PLACE
ONE FOOT ON CUTTER DECK AND ONE
FOOT FIRMLY ANCHORED ON GROUND
SAFELY AWAY FROM UNDERNEATH.
F. Use a wire tie to secure battery pigtail to ATV
rack.
E. (Manual Start) Place one foot on cutter deck
and one foot firmly anchored on ground. Make sure
foot on ground does not get underneath cutter. Pull
starter cord briskly returning slowly until engine
starts.
2-5 ENGINE STARTING
DANGER
F. (Electric Start) Turn key to START position to
activate starter. When engine starts, release key.
The best starter life is provided by using short start-
ing cycles of several seconds. Prolonged cranking of
more than 15 seconds per minute can damage
starter motor.
DO NOT START CUTTER ENGINE UNLESS
CUTTER IS SECURELY HITCHED TO
TOWING
VEHICLE.
ACCIDENTAL
UNHITCHING COULD CAUSE SERIOUS
INJURY OR DEATH.
G. When engine is warm, adjust throttle to
desired speed.
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B. Release parking brake.
2-6 CUTTING
C. Select lowest gear and begin cutting at a slow
speed. Adjust speed to match terrain and grass
thickness. When cutting thick grass, it may be nec-
essary to adjust cutter lower in front to help prevent
stalling. Care should be taken when turning sharply
or backing that rear wheels of towing vehicle do not
hit cutter. Cut up or down the face of slopes, not
across the face.
WARNING
ROTARY CUTTERS CAN DISCHARGE
OBJECTS AT HIGH SPEEDS. TO AVOID
SERIOUS INJURIES OE DEATH:
● OPERATE ONLY WITH SIDE BANDS IN
GOOD REPAIR.
NOTE
● KEEP CHILDREN, PETS, AND
BYSTANDERS AWAY FROM THE
WORK AREA.
Optional front and rear rollers are available to help
prevent scalping on unlevel terrain.
2-7 ENGINE SHUTDOWN
● DO NOT OPERATE CUTTER IN
VICINITY OF OTHER PERSONS.
A. Apply parking brake.
B. Pull out kill switch plug.
C. Close fuel valve.
A. Connect kill switch tether cord from switch
through operator’s belt loop (or equivalent) to towing
vehicle forward of operator’s seat. (Figure 2-5)
DANGER
NEVER OPERATE THIS MACHINE
WITHOUT KILL SWITCH PROPERLY
ATTACHED. FAILURE TO DO SO COULD
RESULT IN SERIOUS INJURY OR
DEATH.
Figure 2-5 Kill Switch
Proper Use Of Safety Switch And Cord
Connect To Towing Vehicle
Cord Through Belt Loop
Throttle
Kill Switch Plug
Kill switch plug must be installed to start
cutter engine. Remove to stop engine.
11
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SECTION III
MAINTENANCE
10. During operation, listen for abnormal sounds
WARNING
which might indicate loose parts, damaged bear-
ings, or other damage. Repair or replace as nec-
essary.
BEFORE PERFORMING MAINTRENANCE
INSPECTIONS OR WORK ON CUTTER,
SHUT CUTTER ENGINE OFF AND DIS-
CONNECT SPARK PLUG WIRE. FAILURE
TO DO SO COULD RESULT IN ACCIDEN-
TAL STARTING OF ENGINE CAUSING
POSSIBLE INJURY OR DEATH.
40 HOURS
1. Grease blade hub assembly using grease gun
and multi-purpose grease until grease purges out
top seal. Wipe away excess grease to prevent
contact with belt.
3-1 MAINTENANCE CHECK LIST
3-2 BELT ADJUSTMENT
Perform scheduled maintenance as outlined below.
Shut down engine, disconnect spark plug wire, and
disconnect battery pigtail harness before doing main-
tenance inspections and work. For engine mainte-
nance see Engine Owner’s Manual. All bolts should
be torqued as recommended in Torque Chart unless
otherwise specified.
A. Remove belt shield.
B. Check belt tension as shown in Figure 3-1. If
belt needs adjusting, proceed to step “C”. If not,
reinstall belt shield.
C. Loosen four bolts securing engine stand to
deck weldment. (Figure 3-2)
D. Turn adjusting bolt located at front of engine
stand clockwise to tighten belt, counterclockwise to
loosen belt. Place enough tension on belt to allow
not more than 1/2” and not less than 1/4” deflection.
(Figure 3-1) If a belt tension gauge is available, set
to 120 lbs. of tension.
BEFORE EACH USE
1. Check engine oil level. Add oil as necessary per
engine owner’s manual.
2. Check engine fuel level, add as necessary. Allow
engine to cool before filling. Use only approved
funnel and container to handle gasoline. Do not
fuel tank indoors. Wipe up spilled gasoline.
E. Tighten four engine stand bolts.
F. Reinstall Shield.
3-3 REPLACING BELT
3. Inspect blade belt for tightness and wear. Tighten
if necessary per paragraph 3-2.
A. Remove belt shield. (Figure 3-2)
B. Loosen four bolts securing engine stand to
deck weldment.
4. Check blade for sharpness and damage. If dull,
sharpen at a 45 degree angle on a bench grinder.
Make certain blade is balanced before rein-
stalling. If blade is bent, broken, or worn out,
replace with a genuine Bush Hog replacement
blade.
Figure 3-1
Approximately 1/4”
Belt Deflection
5. Check blade bolts for tightness. Tighten 3/4 x
2-1/4” bolts to 297 ft./lbs. and the 1/2 x 2” bolts to
76 ft./lbs.
Ruler
Straight Edge
6. Check blade bar nut for tightness. Tighten to 750
ft./lbs.
4 lbs. of Force
7. Make certain the cutter deck enclosed sides are
not damaged, bent or missing. Make necessary
repairs before operating cutter.
Figure 3-2
Belt Shield
8. Make certain belt shield is in place and in good
condition.
9. Clean any debris from the safety decals and
check decals for legibility. Replace any missing or
illegible decals. Read and heed the safety decal
messages.
Engine Stand
Adjusting Bolt
12
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C. Turn adjusting nut counterclockwise and slide
engine rearward. Remove old belt.
D. Install new belt onto pulleys. Do not pry belt
onto pulley.
Figure 3-3
Hub And Blade
Assembly
Hex Nuts
Bushing
E. Turn adjusting nut clockwise to tighten belt.
Place enough tension on belt to allow not more than
1/2” and not less than 1/4” deflection.
F. Tighten four engine stand bolts.
Oil Seal
Bearing Cone
Outer Bearing Cup
G. Reinstall belt shield.
3-4 HUB BEARING REPLACEMENT
Hub Assembly
A. Remove belt shield. (Figure 3-2)
B. Loosen engine mount and remove belt.
C. Loosen set screws and remove 7/16” bolt.
Remove pulley from spindle. Do not lose key.
D. Remove the six nuts securing hub assembly to
deck.
Inner Bearing Cup
Bearing Cone
Seal, Triple Lip
E. Remove upper nut to free spindle retaining nut.
(Figure 3-3)
Hex Nut
F. Lift out bushing.
G. Tap spindle out of hub.
Lockwasher
Shaft, Spindle
H. Remove grease seals and bearings.
I. Check bearing cups inside hub for damage. If
damaged, tap out cup(s), perform step “J” below,
then insert new cup(s).
Key
Blade Bar
Slotted Nut
J. Clean inside of hub with suitable solvent.
NOTE
Check to see if blade needs sharpening or replacing.
K. Insert lower bearing and seal into hub.
L. Install spindle into hub taking care not to dam-
age grease seal.
1/2 x 2” Capscrew
Lockwasher
Uplift
Blade
Hex Jam Nut
M. Insert upper bearing, seal and bushing into hub.
Seal should be installed with metal face against bear-
ing to allow grease to purge outward from bearing.
N. Place nut onto spindle. Tighten nut until it takes
7-12 in.lbs. (.79 - 1.35Nm) to turn blade. To measure,
place torque wrench on nut and turn blade while
reading gauge. If nut is too tight, loosen nut two full
turns; tap lightly on top of spindle, then retighten.
After nut is tightened, install jam nut as shown.
NOTE
Cotter Pin
3/4 x 2-1/4” Blade Bolt
3-6 TROUBLESHOOTING
Troubleshooting procedures are listed in Table 3-1
below. If the problem cannot be solved or replace-
ment 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.
If a torque wrench is not available, tighten nut until
there is no vertical movement in spindle. Make cer-
tain blade will spin freely.
WARNING
O. Using a grease gun, fill inside of hub with
multi-purpose grease. Pump in through grease fitting
until grease expels out of upper seal.
P. Install hub assembly to deck and pulley to
spindle.
BEFORE PERFORMING MAINTENANCE
INSPECTIONS OR WORK ON CUTTER, SHUT
CUTTER ENGINE OFF AND DISCONNECT
SPARK PLUG WIRE. FAILURE TO DO SO
COULD RESULT IN ACCIDENTAL STARTING
OF ENGINE CAUSING POSSIBLE INJURY OR
DEATH.
Q. Install belt and adjust per paragraph 3-2.
R. Install belt shield.
3-5 BLADE REPLACEMENT
NOTE
Remove old blades. Install new blades with uplift
positioned as shown in Figure 3-3. Torque 3/4 x 2-
1/4” bolts to 297 ft./lbs. and 1/2 x 2” bolts to 76
ft./lbs. Wear heavy gloves to protect hands.
Engine warranty, service and parts must be
obtained through an authorized service center
for Honda engines.
13
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Table 3-1 General Troubleshooting
TROUBLE
PROBABLE CAUSE
REMEDY
Cutter engine stalls
continuously
Cuttings not discharging
Tilt cutter forward
Increase cutter height
Decrease speed
Towing cutter fast
Cutting height too low
Cutter engine speed too slow
Engine malfunctioning
Loose or broken belt
Clutch malfunctioning
Blade is dull
Increase cutting height
Increase speed
Refer to engine owner’s manual
Tighten /Replace
Contact your Bush Hog dealer
Sharpen blade
Not cutting grass
Blade is upside down
Pulleys misaligned
Incorrect belt tension
Excessive debris on deck
Blades contacting ground
Cutter not level
Reverse blade
Excessive belt wear
Align pulleys
Adjust tension
Keep clippings cleaned from top of deck
Increase cutter height
Level cutter
Rapid blade wear
Uneven cut
Dull blade
Sharpen blade
Engine not at full rpm
Blade upside down
Belt slippage
Increase rpm
Reverse blade
Tighten/Replace belt
Increase cut height
Install roller option
Scalping
Cutter set too low
Uneven terrain
SECTION IV
DEALER ASSEMBLY
CAUTION
THE FOLLOWING SAFETY PRECAUTIONS SHOULD BE
THOROUGHLY UNDERSTOOD BEFORE ATTEMPTING
MACHINE ASSEMBLY.
1. Wear 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. Do not lift heavy parts or assemblies. Use crane, jack, tackle, fork trucks, or other mechanical devices.
3. Select an area for assembly that is clean and free of any debris which might cause persons working on the
assembly to trip.
4. Arrange parts to be assembled neatly in the work area and have tools or other mechanical assisting
devices in easy reach.
5. Inspect all parts and assemblies thoroughly and remove any sharp edges, grease, oil, or dirt which might
cause pieces to slip when handling.
6. Preview the assembly instructions in your operator’s manual berfore proceeding further.
7. 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.
8. Never put hands or any other part of body under blocked up assemblies if at all possible.
9. Always wear goggles or safety glasses when hammering, grinding or drilliing metal parts.
10. If the assembly calls for welding or cutting, be sure that there are no flammable materials close at hand and
the bystanders have taken necessary precautions.
14
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AFTER COMPLETING ANY ASSEMBLY STEP, THOROUGHLY READ THE NEXT STEP IN THE ASSEMBLY
INSTRUCTIONS BEFORE PROCEEDING WITH THAT STEP.
11. After completing assembly, thoroughly inspect the machine to be sure that all nuts, bolts, hydraulic fittings
or any other fastened assemblies have been thogoughtly tightened.
12. After completing assembly, be sure that all safety locking devices or guards are in place.
13. Before operating the machine, thoroughly read the operation section of this manual.
14. Before operating, read the maintenance section of this manual to be sure that any parts requiring
lubrication such as engines are full to avoid any possible damage.
BEFORE OPERATING THE EQUIPMENT, IF YOU HAVE ANY QUESTIONS REGARDING THE PROPER
ASSEMBLY OR OPERATION, CONTACT YOUR AUTHORIZED BUSH HOG DEALER OR REPRESENTATIVE.
ers on clevis rod. Thread handle onto rod.
4-1 BASE UNIT ASSEMBLY
E. Fasten height adjustment assembly to axle and
deck using two 1/2 x 2-1/2” bolts, bushings, flatwash-
ers, lockwashers and nuts.
A. Mount spindle weldment to axle weldment
using four 1/2 x 1-1/2” bolts and lock nuts. (Figure 4-
F. Mount tongue to front of deck using two 1/2 x 1-
1)
1/4” bolts and locknuts. Nuts should be snug, not
B. Mount axle assembly to frame using two 1/2 x
tight, to allow tongue to pivot.
1-1/4” bolts and locknuts (Figure 4-1). Nuts should be
snug, not tight, to allow axle to pivot.
G. Attach leveling rod to tongue and axle using two
1/2 x 1-1/4” bolts and locknuts. Nuts should be snug,
C. Assemble wheels onto axles in the following
not tight, to allow axle and tongue to pivot. If vehicle
order: Two 3/4” flatwashers, wheel, one 3/4” flat-
to be used for towing cutter is present, adjust the lev-
washer, and cotter pin.
eling bar during installation per paragraph 2-2.
D. Insert thread end of clevis rod into end of cuff
weldment opposite bushing. Place two 1/2” flatwash-
Figure 4-1 Base Unit
Cuff Weldment
Height Adjustment Handle
Bushing
1/2 x 2-1/2” Bolt
1/2 x 1-1/2” Bolts
1/2 x 1-1/4” Bolts
1/2 x 2-1/2” Bolt
Axle Weldment
Clevis Rod
Bushing
Spindle
Weldment
1/2 x 1-1/4” Bolt
1/2 x 1-1/2”
Bolts
1/2 x 1-1/4” Bolt
Tongue
Leveling Rod
1/2 x 1-1/4” Bolt
Wheel
15
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Red (To Starter)
White
Green
To Battery
Figure 4-2 Wiring Diagram
White
-
+
Red
Red
White
Battery Pigtail
Red
Green
To Key Switch
Orange
4-2 ELECTRIC START CONNECTION
TO ENGINE
To Safety
Kill Switch
NOTE
To mount control on ATV, see paragraph 2-4.
E. Attach female terminals on end of jumper
wires to key switch mounted in control box. Attach
female terminal ends on green and orange wires to
kill switch mounted in control box. (Figure 4-2)
F. Push engine throttle down to limit of travel.
Push remote throttle control to stop position. Insert
cable into throttle. Place cable housing under cable
clamp and tighten. (Figure 4-3)
A. Cut ring connector from engine end of green
wire in cutter wiring harness. (Figure 4-2) Strip 1/4”
of insulation from end of green wire.
B. Using butt splice, connect green wire from
wiring harness to green wire lead next to engine
throttle, crimping with pliers. (Figure 4-3)
C. Attach white wire with loop connector as
shown in Figure 4-3.
D. Attach red wire with loop connector and short
red jumper wire to post on engine starter solenoid.
Attach opposite end of jumper wire to male prong on
solenoid.
G. Plug battery pigtail into harness.
H. Using wire ties, strap throttle control cable
and wiring harness together.
Figure 4-3 Honda Engine
White Wire
Butt Splice
Green Wire
Red Jumper Wire
Red Wire
16
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4-3 OPTIONAL FRONT ROLLER
INSTALLATION (Figure 4-4 )
Figure 4-5
Bumper Guard
Bolt rollers to deck front lip placing back plate on
opposite side of deck lip. Bolts should be installed
with head to underside of cutter.
4-4 OPTIONAL REAR ROLLER
INSTALLATION (Figure 4-4)
Bolt roller to rear deck band placing back plate to
underside of deck. Bolts should be installed with
head to underside of cutter.
Figure 4-6 Offset Tongue
4-5 OPTIONAL BUMPER GUARD
INSTALLATION (Figure 4-5)
Outer Lug For
Offset Tongue
Using bumper as a template, mark and drill 7/16”
holes through side of deck. Bolt bumper to deck as
shown with heads of bolts to the underside of deck.
4-6 OPTIONAL OFFSET TONGUE
INSTALLATION (Figure 4-6)
Leveling Rod
Position mounting bracket along front edge of
deck as shown and mark hole locations. Drill 7/16”
holes through top and side of deck. Attach bracket to
deck with bolts provided. Attach tongue to bracket
and deck lug. The leveling rod must be moved from
the center pull location to the outer lug on the exle
assembly. Connect leveling rod between tongue lug
and axle lug with threaded end to the rear. Nuts on
tongue and leveling rod should be snug, not tight, to
allow tongue and leveling rod to pivot.
3/8 x 1”
Bolts
1/2 x 1-1/4”
Bolt
Offset
Tongue
Mounting
Bracket
1/2 x 1-1/4”
Bolt
3/8” Locknuts
1/2” Locknut
Rear Roller Assembly
Figure 4-4
Front and Rear Roller Installation
Front Roller Assemblies
17
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SAFETY DECALS
To promote safe operation, Bush Hog supplies safety decals on all products manufactured. Because damage
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.
❷❷❷❷❷
❷
Part No. 96103
❷
❷
❷
Part No. 81752
❷
Part No. 81754
Part No. 81753
18
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TORQUE SPECIFICATIONS
Proper toque for American fasteners used on Bush Hog equipment.
Recommended Torque in Foot Pounds (Newton Meters).*
AMERICAN
BOLT DIAMETER
Bolt Head Markings
WRENCH
SIZE (IN.) “A”
(IN.) “B” AND
THREAD SIZE
SAE
GRADE 2
SAE
GRADE 5
SAE
GRADE 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”
SAE Grade 8
(6 Dashes)
1 - 14 UNF
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.
*Use 75% of the specified torque value for plated
fasteners. Use 85% of the specified torque
values for lubricated fasteners.
211 (286)
418 (566)
19
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WARNING
THE ENGINE EXHAUST FROM THIS PRODUCT CONTAINS
CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE
CANCER, BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM.
®
BUSH HOG, L.L.C.
P.O. Box 1039
●
Selma, AL 36702-1039
Telephone (334) 874-2700
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