Bush Hog MID MOUNT ZERO TURN SERIES Operator's Manual

BUSH HOG

®

ASSEMBLY ● OPERATION ● MAINTENANCE

203 $4.00

50027862

MID MOUNT

ZERO TU RN MOWER

Operator’s Manual

CONGRATULATIONS!

You have invested in the best implement of its type on the market today.
The care you give your Bush Hog implement will greatly determine your satisfaction

with its performance and its service life. We urge a careful study of this manual to provide
you with a thorough understanding of your new implement before operating, as well as
suggestions for operation and maintenance.

If your manual should become lost or destroyed, Bush Hog will be glad to provide you with
a new copy. Order from Bush Hog, P. O. Box 1039, Selma, Alabama 36702-1039.

As an authorized Bush Hog dealer, we stock genuine Bush Hog parts which are
manufactured with the same precision and skill as our original equipment. Our trained
service personnel are well informed on methods required to service Bush Hog equipment,
and are ready and able to help you.

Should you require additional information or assistance, please contact us.

YOUR AUTHORIZED

BUSH HOG DEALER

BECAUSE BUSH HOG MAINTAINS AN ONGOING
PROGRAM OF PRODUCT IMPROVEMENT, WE
RESERVE THE RIGHT TO MAKE IMPROVEMENTS IN
DESIGN OR CHANGES IN SPECIFICATIONS WITH­OUT INCURRING ANY OBLIGATION TO INSTALL
THEM ON UNITS PREVIOUSLY SOLD.

BECAUSE OF THE POSSIBILITY THAT SOME
PHOTOGRAPHS IN THIS MANUAL WERE TAKEN OF
PROTOTYPE MODELS, PRODUCTION MODELS MAY
VARY IN SOME DETAIL. IN ADDITION, SOME
PHOTOGRAPHS MAY SHOW SHIELDS REMOVED
FOR PURPOSES OF CLARITY. NEVER OPERATE
THIS IMPLEMENT WITHOUT ALL SHIELDS IN PLACE.

MID MOUNT ZERO TURN SERIES

TABLE OF CONTENTS

SECTION PAGE

Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . 2

Dealer Preparation Check List . . . . . . . . . 3

Safety Precautions. . . . . . . . . . . . . . . . . . 4

Federal Laws and Regulations. . . . . . . . . 7

I INTRODUCTION AND DESCRIPTION . . 8

Introduction. . . . . . . . . . . . . . . . . . . . . . . . 8

Description . . . . . . . . . . . . . . . . . . . . . . . . 8

Specifications. . . . . . . . . . . . . . . . . . . . . . 9

II OPERATION . . . . . . . . . . . . . . . . . . . . . 10

General Safety . . . . . . . . . . . . . . . . . . . . 10

Pre-Operation Checklist. . . . . . . . . . . . . 10

Operation . . . . . . . . . . . . . . . . . . . . . . . . 10

Mowing Recommendations . . . . . . . . . . 12

III MAINTENANCE. . . . . . . . . . . . . . . . . . . 13

Maintenance Schedule. . . . . . . . . . . . . . 13

Engine . . . . . . . . . . . . . . . . . . . . . . . . . . 14

SECTION PAGE

Battery . . . . . . . . . . . . . . . . . . . . . . . . . .14

Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Mower Blades . . . . . . . . . . . . . . . . . . . . .14

Neutral Adjustment . . . . . . . . . . . . . . . . .15

Motion Control Adjustment . . . . . . . . . . .15

Drive Adjustments . . . . . . . . . . . . . . . . .15

Test Drive Operations . . . . . . . . . . . . . . .15

Leveling The Deck . . . . . . . . . . . . . . . . .16

Counterbalance Springs . . . . . . . . . . . . .16

Deck Belt Adjustment . . . . . . . . . . . . . .16

Deck Belt Replacement . . . . . . . . . . . . .16

Start Up Maintenance . . . . . . . . . . . . . . .17

Troubleshooting . . . . . . . . . . . . . . . . . . .18

IV ASSEMBLY . . . . . . . . . . . . . . . . . . . . . .19

Wiring Schematics . . . . . . . . . . . . . . . . .20

Safety Decals . . . . . . . . . . . . . . . . . . . . .21

Torque Specifications . . . . . . . . . . . . . . .23

1

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 traveling to or

BUSH HOG

®

ZERO TURN MOWER 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 two (2) years 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 equip­ment 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 equip­ment 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 war­ranties, 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 transportation to and from dealership or service calls made by dealers, ie, driving time, towing,

pickup and delivery.

2. To vendor items which carry their own warranties, such as engines, batteries, tires, and tubes.

3. If the unit has been subjected to misapplication, abuse, misuse, negligence, fire or other accident.

4. 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.

5. 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.

6. 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.

7. 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 LIM­ITED 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.

MAKE CERTAIN THE WARRANTY REGISTRATION
CARD HAS BEEN FILED WITH BUSH HOG/
SELMA, ALABAMA

MODEL NUMBER
SERIAL NUMBER
DATE OF RETAIL SALE

2

DEALER PREPARATION CHECK LIST

MID MOUNT ZERO TURN MOWER

BEFORE DELIVERING MACHINE — The following check list should be completed.

Use the Operator’s Manual as a guide.

❒ 1. Engine has been serviced.
❒ 2. Battery fluid level is checked.
❒ 3. Low oil pressure warning buzzer checked for operation.
❒ 4. Kill switches checked for operation.
❒ 5. Assembly completed.
❒ 6. All fittings lubricated.
❒ 7. Hydraulic Reservoir filled with oil.
❒ 8. All shields in place and in good condition.
❒ 9. All fasteners torqued to specifications given in Torque Chart.

❒ 10. All decals in place and readable. (See decal page.)
❒ 11. Overall condition good (i.e. paint, welds)

❒ 12. Parking brake checked and adjusted, if necessary.
❒ 13. Steering checked and adjusted, if necessary.

❒ 14. Check tire pressure.
❒ 15. Operators manual has been delivered to owner and he has been instructed

on the safe and proper use of the cutter.

Dealer’s Signature

Purchaser’s Signature

THIS CHECKLIST T

O 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

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 safe­ty 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.

White letters on RED

This signal word indicates a potentially hazardous situation
which, if not avoided, could result in death or serious injury

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.

It may also be used to alert against unsafe practices.

Black letters on YELLOW

4

IMPORTANT SAFETY PRECAUTIONS

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 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.

ACCIDENT PATTERNS TO AVOID

1. CONTACT WITH THE ROTATING BLADE - This accident usually happens when the operator is clear­ing the discharge chute of grass, (especially when the grass is wet), or when the operator adjusts the
machine without turning it off and waiting for the blades to completely stop.

2. PROPELLED OBJECTS - Sticks, rocks, wires, and other objects can be propelled out through the dis­charge chute or from under the mower housing. Bystanders are particularly vulnerable.

3. GRASS DISCHARGE CHUTE - The mower shall not be operated without the grass discharge chute

in its lowered position.

4. OVERTURNING - This happens when riding mowers are used on steep slopes, embankments or hills.
The operator in these cases can come in contact with blades or sustain injuries during a fall.

5. MOWER RUNNING OVER THE VICTIM - This usually happens when a riding mower is driven in reverse.
The accident victims are most often young children whom, unseen by the operator of the mower, were in
the area being mowed.

WE SHARE YOUR DESIRE TO PROTECT YOURSELF, YOUR FAMILY, YOUR FRIENDS AND YOUR
NEIGHBORS FROM ACCIDENTAL INJURY. OBSERVING AND ENFORCING THE FOLLOWING GUIDE
LINES WILL HELP TO INSURE THE SAFETY OF EVERYONE.

SAFETY INSTRUCTIONS AND RECOMMENDATIONS

1. PEOPLE WHO OPERATE, SERVICE, OR ARE OTHERWISE ASSOCIATED with the Zero Turning
Radius Mower should be trained in its proper use and warned of its dangers. Before operating, adjusting,
or servicing the Zero Turning Radius Mower they should read and understand this entire manual and the
engine manual.

2. AVOID CONTACT WITH MOVING PARTS. Keep hands and feet from under mowing deck and away
from blades at all times. Turn engine (motor) off if you must unclog the chute.

3. AVOID HILLS AND SLOPES. Use EXTREME caution when mowing and/or turning on slopes as loss of traction
and/or tip-over could occur. Drive slower on slopes. DO NOT mow slopes greater than 15 degrees. Watch for ditches,
holes, rocks, dips and rises, which change the operating angle. Keep away from drop-offs and steep banks. Avoid
sudden starts when mowing uphill - mower may tip backwards. Loss of traction may occur going downhill - weight
transfer to the front wheels may cause drive wheels to slip and cause loss of braking. DO NOT mow slopes when
grass is wet - slippery conditions affect steering and reduce traction and braking. The operator is responsible for safe
operation on slopes.

4. DISENGAGE POWER TO MOWER BEFORE BACKING UP. Do not mow in reverse unless absolutely
necessary and then only after turning around and observing the entire area behind the mower. Go slowly.
Most “running over victim” accidents occur in reverse.

5. BEGINNING OPERATORS SHOULD LEARN HOW TO STEER the Zero Turning Radius Mower before
attempting to mow. Start with slow engine speed and drive without the blades engaged in open area until

comfortable with the machine.

6. KNOW HOW TO STOP QUICKLY. Know the location and operation of every control, especially how to brake and
how to disengage the mower blades.

5

SAFETY CONTINUED

7. DO NOT MOVE THE CONTROL LEVERS from forward position to reverse position rapidly. The speed
and/or direction of travel is affected instantly by movement of the Control Levers.

8. DO NOT ALLOW CHILDREN TO OPERATE MOWER. Do not allow others who have not had instruc­tions to operate mower.

9. ALWAYS TURN ENGINE OFF AND REMOVE KEY before leaving mower to prevent children and
inexperienced operators from starting the engine. Never leave the mower unattended with engine run
ning. Always wait for all moving parts and all sounds to stop before leaving operator’s seat. Always set
the parking brake on an unattended mower.

10. WEAR STURDY, ROUGH-SOLED WORK SHOES AND CLOSE-FITTING SLACKS AND SHIRTS.
Never operate mower in bare feet, sandals or sneakers.

11. WEAR PERSONAL PROTECTIVE EQUIPMENT such as, but not limitied to, protection for eyes, ears, feet, hands
and head when operating or repairing equipment. Do not wear loose clothing or jewelry that may catch on equip­ment moving parts.

12. NEVER CARRY PASSENGERS.

13. KNOW THE AREA YOU ARE TO MOW. Watch for hidden dangers such as rocks, roots, sticks, holes,
bumps, and drop-offs, etc. Before mowing, pick up all debris in area to be mowed. Sharp and hard
objects can be propelled at a high speed and can act like shrapnel. Walk through tall grass BEFORE
MOWING to make sure there are no hidden dangers. Mow higher than desired in tall grass to expose
any hidden objects and/or obstacles, clean the area, and then mow to the desired height.

14. BE SURE THE AREA IS CLEAR of other people before mowing. Stop machine if anyone enters the area.

15. NEVER REFUEL A MOWER INDOORS. Allow the engine time to cool before refueling. Unseen vapors may be
ignited by a spark. Always clean up spilled gasoline. Never run the engine indoors in a garage
or any other closed building. Allow engine to cool before storing in any enclosure. The engine exhaust
and gasoline fumes are dangerous.

16. NEVER REMOVE THE FUEL CAP or add gasoline to a running or hot engine or an
engine that has not been allowed to cool for several minutes after running. Always make sure the gas
cap is in place.

17. DO NOT SMOKE AROUND THE MOWER or the gasoline storage container. Gasoline fumes can easi­ly ignite.

18. KEEP GASOLINE IN A WELL-VENTILATED AREA away from your living quarters and in tightly
capped safety cans. Never store mower with gasoline in the tank inside a building where fumes may
reach open flame or spark.

19. DISENGAGE BLADES, STOP ENGINE, ENGAGE PARKING BRAKE AND REMOVE IGNITION KEY before any
servicing. Be sure all moving parts and all sounds have stopped. Let engine cool and disconnect the spark plugs so
the engine cannot start by accident.

20. KEEP ALL NUTS, BOLTS, AND SCREWS TIGHT to be sure equipment is in safe working condition, espe­cially blade bolts.

21. VEHICLE SHOULD BE STOPPED AND INSPECTED FOR DAMAGE after striking a foreign object and
the damage should be repaired before restarting and operating the equipment. Stop immediately and
check for damage or loose parts if mower should start vibrating.

22. DISENGAGE BLADES BEFORE DRIVING ACROSS WALKS or projecting objects.

23. KEEP SAFETY DEVICES AND GUARDS IN PLACE. If any of the safety switches become inoperable,
have them repaired immediately.

24. DO NOT STEP OR STAND ON THE MOWER HOUSING. Step or stand only on the tread areas on the deck.

25. WATCH OUT FOR TRAFFIC near roadways and when crossing roads.

26. THIS MACHINE IS NOT MEANT FOR HIGHWAY OR STREET USE. It is not a recreational vehicle and it should not
be operated as such.

27. DO NOT USE MOWER WHEN GRASS IS WET OR SLIPPERY.

28. MOW ONLY DURING DAYLIGHT.

29. ALWAYS DISENGAGE THE MOWER BLADE CLUTCH when transporting.

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.

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

INTRODUCTION

We are pleased to have you as a Bush Hog cus­tomer. Your Bush Hog Mid Mount Zero Turn Mower
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 mower 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 the implement. If any
assistance or additional information is needed, con­tact your authorized Bush Hog dealer.

NOTE:
All references made to right, left, front, rear, top or
bottom is as viewed facing the direction of forward
travel.

DESCRIPTION

The Zero Turn is intended for use on large lawns
and other frequently maintained areas where a
smooth, even cut is desired and superior maneuver-

ability is needed. The tractor unit consists of either a
22, 25 or 26 hp Kohler, 23 hp water cooled Kohler
or 25 hp Kawasaki twin cylinder engine. The engine
has a pressurized oil lubrication system with spin-on
type filter, fused electronic ignition, electric start and
a 12 gallon fuel system.

Two hydrostatic pumps and two wheel motors are
used for propelling and steering. The pumps are belt
driven by the engine output shaft. One lever for each
drive controls both speed and direction. This inde­pendent control of each drive wheel coupled with
continuously variable speed selection gives the Zero
Turn mower exceptional maneuverability.

The mower deck is driven by a v-belt from the
engine. An electrically controlled clutch is used to
engage/disengage the PTO.

The mower attachment is available in 55”, 61” or 73”
cutting widths. The mower has three uplift blades,
driven by a single V-belt controlled by a spring
loaded tensioner.

8

SECTION I

INTRODUCTION AND DESCRIPTION

CONTROLS

SAFETY INTERLOCK SYSTEM

Your Bush Hog Zero Turn is equipped with a Safety
Interlock System that is designed to help prevent
possible serious injuries. Understanding and main­taining this system is vital for safe operation.

To Start Engine:

1. Blades (PTO) must be disengaged.

2. Control levers in neutral (swung out).

3. Parking brake on.

4. Operator in seat.

The Engine Will Kill If:

1. The operator leaves the seat with:
a. The control levers out of neutral (swung in).
b. The blades are engaged.
c. The parking brake is off.
d. All of the above.

2. The park brake is on before the control levers

are in neutral (swung out).

DO NOT OPERATE MOWER IF SAFETY SWITCH­ES ARE NOT OPERATING PROPERLY.

CONTROL LOCATIONS

① Ignition Key - On right hand control console.
② Engine Throttle - On right hand control console.
③ Two Steering/Speed Control Levers - In front of

seat at side. (Not shown below)

④ PTO Clutch Switch - On right hand control

console.

⑤ Parking Brake Lever - On left side of operator (Not shown

below)

⑥ Blade Height Adjust Pin - Right side of deck. (Not

shown below)

⑦ Choke - On right hand control console.
⑧ Hydrostatic Pump Bypass Valve - Right sides of

pumps. (Not shown below)
Light Switch - On right hand control console.

➉ Hour Meter - On right hand control console.

Warning Lights - On right hand control console
for engine temperature and oil pressure.

TRACTOR SPECIFICATIONS

Width - All Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49”

Height - To top of seat back. . . . . . . . . . . . . . . . . . . . . 46”

Fuel Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 gallons

Hydrostatic Fluid Reservoir . . . . . . . . . . Approx. 5 quarts

Hydrostatic Pumps- All Models . . (2) Hydro-Gear pumps
Engines - 22 h.p. Kohler Command

25 h.p. Kohler Command
23 h.p. Water Cooled Kohler
26 h.p. Kohler Command Fuel Injected
25 h.p. Kawasaki

Tires - All Models - Front . . . . . . . . . . . . . . . . 13 x 6.5 - 6

Drive . . . . . . . . . . . . . . . 24 x 12.0 -12

DECK SPECIFICATIONS

ITEM
Cutting width 55” 61” 73”

Cutting Heigh --------------- 1” to 4-1/4” in 1/4” increments
Blades 19” 21” 25”

Overall width
including chute 67” 73” 85”

Material thickness - Deck -------------7 GA.-----------------

Spindle bearings ----------------------25 mm------------------

9

WARNING

DO NOT OPERATE MACHINE UNLESS
INTERLOCK SYSTEM FUNCTIONS PROP­ERLY. FAILURE TO HEED THIS WARNING
MAY RESULT IN SERIOUS INJURY, DEATH
OR EQUIPMENT DAMAGE.

⑨

11

➉

⑨

④

⑦

②

①

11

SECTION II

OPERATION

GENERAL SAFETY

Only qualified people familiar with this operator’s
manual should operate this machine. Operator
should wear hard hat, safety glasses, and safety
shoes. Avoid loose fitting clothing or jewelry. The
operator should read, understand and practice all
safety messages shown on the caution, warning and
danger decals affixed to the machine to avoid seri­ous injury or death. Before beginning operation, clear
work area of any objects that may be picked up and
thrown by mower. Check for ditches, stumps, holes
or other obstacles that could upset power unit or
damage mower. Always push steering levers apart,
set parking brake, disengage PTO, turn off engine,
and allow blades to come to a complete stop before
leaving operator’s seat. Do not operate without all
shields in place and in good condition.

PRE-OPERATION CHECKLIST

1. Make sure fuel tank is full. Use regular unleaded
gasoline. See engine manual for more details.

2. Make sure dirt and foreign matter are kept out of
fuel tank. Use a clean funnel and fuel can.

3. Do not mix oil with gasoline.

4. Do not use white, high test or premium gasoline.
Do not use de-icers, carburetor cleaners or other
such additives.

5. Check the crankcase oil level. Make sure the
engine is off. The mower should be parked on a
level area. Do not overfill. (See your engine man­ual for more detailed instructions.)

6. Check the hydrostatic transmission oil level. (See
“Maintenance” section of this manual.)

7. Check battery fluid level.

AVOID SERIOUS INJURY OR DEATH:
GASOLINE IS EXTREMELY FLAMMABLE AND
EXPLOSIVE UNDER CERTAIN CONDITIONS.

● REFUEL IN A WELL VENTILATED AREA WITH

ENGINE STOPPED.

● DO NOT SMOKE OR ALLOW FLAMES OR

SPARKS IN THE REFUELING AREA OR
WHERE GASOLINE IS BEING STORED.

● DO NOT OVERFILL FUEL TANK. AFTER

REFUELING, MAKE CERTAIN THE TANK CAP
IS CLOSED PROPERLY AND SECURELY.

● BE CAREFUL NOT TO SPILL FUEL WHEN

REFUELING. FUEL VAPOR OR SPILLED FUEL
MAY IGNITE. IF ANY FUEL IS SPILLED, MAKE
SURE THE AREA IS DRY BEFORE STARTING
THE ENGINE.

● KEEP OUT OF REACH OF CHILDREN

WARNING

11.Make sure mower blades are sharp and secured
tightly.

12. Clean the air intake screen on the engine if
necessary.

13. Perform any other maintenance as it becomes
necessary. (See “Maintenance” section)

14.Check low oil pressure warning buzzer for opera­tion. (It should “sound-off” whenever ignition key
is in the “on” position, but engine is not running.)

15. Check parking brake operation by disengaging
hydrostatic pumps (freewheeling position), and
placing the brake lever in the “on” position.
Attempt to rock tractor by hand. Both drive wheels
should be locked. When the brake handle is in the
“off” position, both drive wheels should turn freely.
If there is a problem in either position, refer to
adjustment procedure in the maintenance section.

OPERATION

1. OPEN FUEL SHUT-OFF VALVE left or right
tank.

2. MOVE CONTROL LEVERS TO neutral “OUT”
position by pushing each one straight sideways.

3. SET PARKING BRAKE. Pull rearward to set.

4. DISENGAGE MOWER BLADE CLUTCH by

moving clutch switch to “OFF” (down) position.

5. SET ENGINE CHOKE CONTROL for cold starts
to full position.

6. SET ENGINE THROTTLE TO 1/2 throttle.

7. TURN IGNITION KEY to “START” position and
release to “RUN” as soon as engine starts.
NOTE: Prolonged cranking will damage starter
motor and shorten the battery life.

8. ADJUST ENGINE THROTTLE AND CHOKE for
desired engine smoothness and speed. NOTE:
When mowing, always run engine at full throttle.

9. RELEASE PARKING BRAKE. Push brake lever
forward to release.

10

8. Inspect V-belts

9. Check tire pressure: Front Tires - 15 psi

Drive Tires - 15 psi

10. Make sure underside of mower deck is free of
grass.

WARNING

ENGINE EXHAUST GASES CONTAIN

POISONOUS CARBON MONOXIDE.

● NEVER RUN ENGINE IN A CLOSED BUILDING

OR CONFINED AREA.

● AVOID INHALING EXHAUST GASES.

13.ENGAGE MOWER BLADES by pulling
up on the PTO clutch switch. The engine will not
start if the PTO switch is engaged. If the engine
is running while the PTO clutch is engaged and
the operator leaves the seat, the engine will stop.

14.TO STOP:
A. Slow engine speed with throttle to slowest

position

B. Disengage the mower blade clutch by mov-

ing the PTO clutch switch to the “OFF” position.

.

C. Move Control Levers to neutral position and

then to the “OUT” position.

D. Set the parking brake.
E. Turn ignition key to “OFF” position.

Lever on the side to which you want to turn slight­ly rearward of the other Control Lever. To turn on
a zero radius axis, go slowly and pull one Control
Lever back and push the other Control Lever for­ward, depending on which direction you wish to
turn.

11.BRAKING: To brake mower, gently move
Control Levers in the direction opposite to travel.
If the parking brake is engaged with the Control
Levers in the “IN” position the engine will stop.

12.CUTTING HEIGHT ADJUSTMENT:

1. Stop engine and move the control levers to the

neutral position and engage the parking brake.

2. Disengage the blades.

3. Depress the deck lift foot pedal raising the

deck to the transport position and place the pedal in
the locked position.

4. Insert height adjustment pin into the hole cor-

responding to the desired cutting height. See decal
on the side of the deck lift plate.

5. Depress the deck lift pedal and lower the deck to

the selected mowing height.

6. To transport, depress the lift foot pedal and lock in

position, then move the height adjustment pin to the

4.75” position.
ANTI-SCALP ROLLER ADJUSTMENT:

1. Stop engine and move the control levers to the

neutral position and engage the parking brake.

2. Disengage the blades.

3. The Anti-Scalp deck rollers are adjustable up and

down to provide improved deck flotation and scalping
protection at various cutting heights. They are not intend-

AVOID SERIOUS INJURY OR DEATH:
DO NOT MOVE STEERING LEVERS FROM
FORWARD TO REVERSE OR REVERSE TO
FORWARD POSITION RAPIDLY. A SUDDEN
CHANGE IN DIRECTION MAY CAUSE LOSS OF
CONTROL AND/OR DAMAGE TO EQUIPMENT.
FOR SMOOTH, SAFE OPERATION, MOVE THE
CONTROL LEVERS IN A GENTLE, SLOW
MOTION, ESPECIALLY ON GRADES.

If the operator is inexperienced with the zero
turning radius lever steering/speed control,
he/she should follow these recommendations:
Disengage the mower blades. Go very slowly
until thoroughly familiar with the machine. Keep
away from fences, buildings, and other obstruc­tions. While becoming familiar with the machine,
move the Control Levers smoothly and slowly.
Practice until operation is smooth and efficient.

10.TO DRIVE: Adjust seat forward or backward for
operator comfort. Move the Control Levers to the
“IN” position. Move Control Levers forward to
move forward. Move levers slowly forward to
increase speed. To reverse direction, move the Control

CAUTION

11

WARNING

CUTTING HEIGHT ADJUSTMENT DECAL

ed to ride continously on the ground. Rollers should
maintain .375” minimum clearance to ground. DO NOT
adjust rollers to support deck. (Refer to illustration).

4. Front Anti-Scalp rollers brackets are removeable.

WARNING

Use EXTREME caution when mowing
and/or turning on slopes as loss of traction
and/or tip-over could occur. Drive slower
on slopes. DO NOT mow slopes greater
than 15 degrees. Watch for ditches, holes,
rocks, dips and rises, which change the
operating angle. Keep away from drop-offs
and steep banks. Avoid sudden starts when
mowing uphill - mower may tip backwards.
Loss of traction may occur going downhill ­weight transfer to the front wheels may
cause drive wheels to slip and cause loss
of braking. DO NOT mow slopes when
grass is wet - slippery conditions affect
steering and reduce traction and braking.
The operator is responsible for safe
OPERATION ON SLOPES.

1

1

⁄4”

1

⁄4”

2

1

3

⁄4”

1

3

⁄2”

3

3

⁄4”

1

2

⁄2”

3

2

⁄4”

3”

4"

1

⁄2”

1

3

⁄4”

1

2”

1

4

⁄4”

cut is the

Transport P

3

⁄4”

1"

osition

F. Remove the key and wait for all movement

and all sound to cease before dismounting.

15. PUMP BYPASS-TO MOVE THE TRACTOR
WITHOUT POWER: The pump bypass valves
are located on the forward sides of each pump.
Turn the control clockwise two complete
turns to release the pump for free wheeling; turn
them counter-clockwise for operation.

Pumps as seen from above. Use a rod through the
hex head, or a 5/8” wrench to open or close the valve.

WARNING

AVOID SERIOUS INJURIES TO OTHERS:
ALWAYS REMOVE THE KEY FROM THE IGNI­TION SWITCH WHENEVER THE MOWER IS
UNATTENDED TO PREVENT CHILDREN OR
UNAUTHORIZED PERSONS FROM STARTING
THE ENGINE.

NOTE: To move the tractor without power, the
pumps must be unlocked and in the free wheel posi­tion. Failure to do so could possibly damage the
hydraulic motors. Never pull at more than 2 MPH.

16. FUEL SHUT-OFF VALVE: Located on the front
panel below the operator is the fuel directional valve.
This valve has three positions for operations and
each position is made in 1/4 turn increments. This
directional valve has a shut off position and can be
used when the machine will not be used for a few
days or when the unit is transported to and from a
work site.

Fuel Flow Valve Position
Off Down
Right Tank Right
Left Tank Left

MOWING RECOMMENDATIONS

1. Keep mower blades sharp.

2. Make sure deck and discharge chute are clean.

ROTARY MOWERS CAN DISCHARGE
OBJECTS AT HIGH SPEEDS. TO AVOID SERI­OUS INJURIES OR DEATH:

● OPERATE ONLY WITH SIDE BANDS IN

GOOD REPAIR AND CHUTE OR GRASS
CATCHER ATTACHMENT INSTALLED.

● KEEP CHILDREN, PETS, AND

BYSTANDERS AWAY FROM THE WORK
AREA.

● DO NOT OPERATE MOWER IN THE VICIN-

ITY OF OTHER PERSONS.

● DISCHARGE AWAY FROM BUILDINGS,

WALLS OR OTHER STRUCTURES.

WARNING

TO AVOID SERIOUS INJURY FROM BLADE
CONTACT, POWER MUST BE OFF TO
CLEAN DISCHARGE CHUTE

DANGER

KEEP HANDS AND FEET AWAY FROM
UNDERNEATH MOWER TO AVOID SERIOUS
INJURY OR DEATH.

WARNING

Hydrostatic Fluid

Reservoir

Cutting Height
Adjustment Pin

Fuel Shut-Off Valve

12

Engine Oil

Filler Cap

Electrical

Fuses

SECTION III

MAINTENANCE

BEFORE PERFORMING ANY MAINTENANCE, TURN OFF ENGINE, REMOVE KEY AND DISCONNECT SPARK
PLUGS. USE EXTREME CARE WHEN WORKING ON MACHINERY. DO NOT WEAR WATCH OR JEWELRY. DO
NOT WEAR LOOSE FITTING CLOTHES, AND OBSERVE ALL COMMON SAFETY PRACTICES WITH TOOLS.

CAUTION

MAINTENANCE SCHEDULE

SERVICE WHEN

Check crankcase oil level_______________________________________________________before each use
Check radiator coolant (If applicable)______________________________________________before each use
Check air intake screen__________________________________________________________after each use

Clean grass from under deck _____________________________________________________after each use
Check tire pressure ____________________________________________________________every 10 hours

Sharpen mower blades _________________________________________________________every 10 hours
Clean air filter element ___________________________________________________________every 8 hours

Check 20W50 motor oil
in hydrostatic system ___________________________________________________________every 10 hours

Check drive belts ______________________________________________________________every 50 hours

(20 hr break-in)

Grease blade spindles __________________________________________________________every 50 hours
Grease front wheels____________________________________________________________every 10 hours
Grease caster wheel pivots ______________________________________________________every 25 hours

Grease pivoting front axle _______________________________________________________every 10 hours
Grease pusher bar pivots________________________________________________________every 25 hours
Grease pivot block _____________________________________________________________every 25 hours
Change engine every 50 hours

crankcase oil ________________________________________________________________(5 hrs break-in)
Change engine oil filter_________________________________________________________every 100 hours

Change hydrostatic oil filter (See your Bush Hog Dealer)

Important: Substitution of an improper filter will cause every 250 hours
hydrostatic failure which will not be covered under warranty_____________________(50 hrs break-in)

Replace air
filter element ____________________________________________________________annually or 500 hours

Check spark plugs________________________________________________________annually or 100 hours
Service battery___________________________________________________________annually or 500 hours

Change hydrostatic oil _________________________________________________________every 500 hours

Perform these maintenance procedures more frequently under extremely dusty, dirty conditions.

Replace decals when illegible. Write parts dept. for free replacement.

13

IMPORTANT:
BEFORE PERFORMING ANY SERVICE, MAINTENANCE OR REPAIR ON THE ENGINE, REFER TO THE
RESPECTIVE ENGINE MANUFACTURERS’ MANUAL FOR SPECIFIC INFORMATION CONCERNING YOUR
PARTICULAR BRAND OF ENGINE.

1. ENGINE:
For complete maintenance and operating infor­mation for your engine, please refer to your
engine operating and maintenance instructions
furnished by the engine manufacturer and includ­ed in your Zero Turn mower information packet.

NOTE

Air intake screen must be kept clean. If
plugged, engine may be seriously dam­aged by over heating.

2. BATTERY:

When taking the battery out of the mower for ser
vicing, make sure to reconnect the cables to the
battery exactly as they were prior to removal.

Keep the battery clean. Remove the corrosion
around the battery terminals by applying a solu­tion of one part baking soda to four parts water.
Coat all exposed terminal surfaces with a light
layer of grease or petroleum jell to prevent corro­sion.

NOTE
At temperatures below 32 degrees F (0 deg
C) the full charge state must be maintained to
prevent cell electrolyte from freezing and
causing permanent battery damage.

3. TIRES:

Correct tire pressure is essential for efficient
operation of the mower. Check tire air pres-

sure periodically. Inflate tires to the pressure
listed:

TIRE PRESSURE

Front Tires

Rear Tires

15 psi 15 psi

AVOID SERIOUS INJURY OR DEATH:

● THE BATTERY CONTAINS SULFURIC ACID.

AVOID CONTACT WITH SKIN, EYES OR CLOTHING.
EYES - FLUSH WITH WATER AND GET PROMPT MED­ICAL ATTENTION.
ANTIDOTE: INTERNAL - DRINK LARGE QUANTITIES
OF WATER OR MILK. FOLLOW WITH MILK OF MAG­NESIA, BEATEN EGG OR VEGETABLE OIL. CALL A
PHYSICIAN IMMEDIATELY.

● BATTERIES PRODUCE EXPLOSIVE GASES.

KEEP SPARKS, FLAMES AND SMOKING MATERI­ALS AWAY. VENTILATE WHEN CHARGING IN AN
ENCLOSED SPACE. WEAR EYE PROTECTION
WHEN WORKING NEAR BATTERIES.

● KEEP OUT OF REACH OF CHILDREN.

4. MOWER BLADES:
Check sharpness of mower blades after every 10
hours of operation. To sharpen blades proceed as

follows:

A. Lift deck and secure in raised position.
B. Remove bolt, cup washer, and blade from shaft.

C Blades should be discarded when worn exces-

sively. See sketch.

D. Sharpen blade with a hand file, electric grinder

or blade sharpener. Wear gloves and eye protection
when sharpening. Grind blade at original bevel.

E. Check balance of blade by positioning the blade

on a nail or blade balance pedestal. Grind the blade
on the end that is heavier until both sides balance.

F. Install blades with the concave side of the cup

washer against blade. Be sure blades are installed
with uplifts and cutting edges in the proper directions.

Tighten retaining bolt to 76 ft./lbs.

5. CLEANING GRASS BUILD UP UNDER DECK

Depress the deck lift foot pedal and lock in position,
then move the height adjustment pin to the 4.25”
position.

Lift the front of the unit and support unit securely.
Clean out any grass build up from underside of deck

and in deck discharge chute.

14

WHEN IT IS NECESSARY TO RAISE THE
DECK OR MOWER FOR SERVICE OR
MAINTENANCE, TO AVOID SERIOUS
INJURY OR DEATH, STOP ENGINE, SET
PARKING BRAKE, REMOVE IGNITION KEY
AND SPARK PLUG WIRES AND SECURE­LY SUPPORT THE DECK OR MOWER
BEFORE WORKING UNDERNEATH.

New Blade

Dangerous!

25 Degrees

When Notch Starts
Discard Blade

WARNING

Lug nuts should be checked regularly for tight­ness. Torque lug nuts to 50 ft./lbs. The center
hub nut should be torqued to 175 - 200 ft./lbs.
and cotter key installed.

WARNING

WHEN IT IS NECESSARY TO RAISE THE
DECK OR MOWER FOR SERVICE OR
MAINTENANCE, TO AVOID SERIOUS
INJURY OR DEATH, STOP ENGINE, SET
PARKING BRAKE, REMOVE IGNITION KEY
AND SPARK PLUG WIRES AND SECURE­LY SUPPORT THE DECK OR MOWER
BEFORE WORKING UNDERNEATH.

WARNING

NEUTRAL ADJUSTMENT

1. Stop engine and remove ignition key.

2. Tilt seat forward.

3. Move the control lever rearward and release the
control lever. This control lever should return to a
position where the control lever can be swung
outward and lock in the neutral outward position.

4. If adjustment is needed, move the control lever
back to the inward position and begin to pull rear­ward. At this beginning rearward motion the cle­vis pin should begin to contact the end of the slot
and start putting pressure on the spring.

5. If adjustment is needed, loosen the nut against
the yoke and while applying slight rearward pres­sure on the motion control lever, turn the head of
the adjustment bolt in the appropriate direction
until the lever is centered.

6. Move the control lever rearward and release the
control lever. This control lever should return to a
position where the control lever can be swung
outward and lock in the neutral outward position.

MOTION CONTROL ADJUSTMENT

1. Raise the drive wheels of the Zero Turn
off of the ground. Safely block the frame
in this position so it is secure. This
adjustment must be made with the drive
wheels turning.

2. Remove the electrical connection from
the seat switch and temporarily install a
jumper wire across the terminals of the
wiring harness.

3. Loosen the jamnuts on the hex turnbuckle,
which connects the lever control arm to
the pump control arm. Note: the nuts to
the front of the hex turnbuckle have left­handed threads.

4. Start the engine. Run the engine at full
throttle and release brake.

5. Position the control levers in the neutral
position. If the drive wheels creep
(rotate) in the neutral position then
lengthen or shorten the turnbuckle
assembly. Make the adjustment to stop
the wheel from rotating.

6. Re-tighten the nuts at the end of the hex
turnbuckles and repeat the procedure for
the opposite side of the unit.

7. Shut the unit off. Remove the jumper wire from
the wiring harness and replace the connectors
into the seat switch. Never operate the mower
unless all safety switches are operating properly.

DRIVE ADJUSTMENTS

Steering and motion controls should be uniform in all
forward and reverse speeds. From the reverse posi­tion the levers should automatically return to neutral
when released.

TEST DRIVE OPERATIONS

Check air pressure in tires. Equal tire pressure is
critical for proper drive operation.

1. Raise drive wheels off ground. Safely block
the frame in this position.

2. Put control levers in neutral lock position
(control levers swung outward).

3. Start engine. Wheels should not rotate. If one or
both drive wheels are turning, perform proce­dures under “Neutral Adjustments” for side(s)
that wheel turns.

15

CAUTION

STOP THE ENGINE BEFORE MAKING
ADJUSTMENTS.

Clevis Pin Rides In Slot

Yoke

Nut

Adjustment Bolt

Hex Turnbuckle

Control Arm Lever

Control Arm

Jamnuts

Pump Control
Arm

LEVELING THE DECK

1. Set all tire pressures to the correct specifications.

2. Place machine on a level slab of concrete.

3. Depress the deck lift pedal raising the deck to
the full lift height position and move the height
adjustment pin to the 4.25” position.

4. Take all the force off the two deck lift springs by
loosening the nuts at the front of each spring.

5. Place a level on the deck, from front to rear. If
the level is too short to reach all the way from
front to rear, lay a straight edge on the deck first,
then place the level on the straight edge.

6. Lay a .125” spacer beneath the front of the level.

7. Adjust nuts until the level’s bubble is centered.
Repeat for the other side of the deck. Additional
adjustments may be made by loosening the
upper chain fasteners and moving the fasteners
in the provided slot.

COUNTERBALANCE SPRINGS

Raise the cutter deck to the transport position.
Adjust the spring with the nut to the follwing lengths:
55” Deck - Spring Length of 15”
61” Deck - Spring Length of 14.5”
73” Deck - Spring Length of 14”
The springs may be tightened or loosened from this
point according to personal preference.

STOP THE ENGINE, SET PARKING BRAKE,
REMOVE IGNITION KEY AND SPARK PLUG
WIRES FOR SAFETY.

CAUTION

DECK SPINDLE BELT ROUTING DIAGRAM

Spring Loaded
Idler Assembly

6”

Front Of Deck

WARNING

TO AVOID SERIOUS BURN INJURIES:

● ALLOW ENGINE, OIL AND HYDRAULIC FLU­IDS TO COOL BEFORE SERVICING TRANSMIS-

SION OR ENGINE SYSTEM

CAUTION

TO AVOID CLEANING SOLVENT FIRES:

● AVOID USING FLAMMABLE SOLVENTS.

● AVOID AREAS WITH IGNITION SOURCES

WHEN USING FLAMMABLE SOLVENTS.

16

DECK BELT REPLACEMENT

Belt adjustment should be checked every 50 hours
to get maximum life and cutting performance from
the mower. Belt tension is adjusted by increasing or
decreasing the length of the spring on the movable
idler. For proper belt tension on the 55”, 61” and 73”
mowers, the spring length should be set at 6”. To
adjust the spring length, loosen or tighten the 1/2”
hex nuts on the spring adjusting rod until the correct
spring length is reached.

DECK BELT REPLACEMENT

USE ONLY GENUINE BUSH HOG REPLACEMENT PARTS

A. Remove the deck shield assembly.
B. Relieve the spring tension by loosening the two
1/2” hex nuts on the spring adjustment rod.
C. Remove old belt.
D. Install new belt. Be sure that the belt is properly
positioned in all sheave grooves.
E. Adjust tension on the belt by adjusting the length of
the spring on the moveable idler. The correct spring
length is 6” for the 55”, 61” and 73” decks.
F. Replace the deck shield assembly.

Engine/Clutch Pulley

Anti-Scalp Rollers

Deck Lift Pedal

Height Adjustment Pin

Deck Lift Spring
Adjustment Nut

Deck

Upper

Chain Fastener

WARNING

HIGH PRESSURE HYDRAULIC FLUID LEAKS
CAN PENETRATE SKIN CAUSING SERIOUS
INJURY AND GANGRENE.

INJECTED FLUID MUST BE SURGICALLY
REMOVED WITHIN A FEW HOURS BY A DOC­TOR FAMILIAR WITH THIS TYPE OF INJURY.

TO AVOID SERIOUS INJURY FROM

PRESSURE LEAKS:

● USE CARDBOARD AND NOT HANDS TO

SEARCH FOR LEAKS.

● RELIEVE HYDRAULIC PRESSURE BEFORE

WORKING ON SYSTEM.

● CHECK HYDRAULIC HOSES, LINES, AND

CONNECTIONS FOR TIGHTNESS AND

GOOD CONDITION BEFORE APPLYING

SYSTEM PRESSURE.

START-UP MAINTENANCE

HYDROSTATIC FLUID

Bush Hog recommends the use of 20W50 motor oil
in the hydrostatic reservoir.

START-UP PROCEDURE

The following start-up procedure should always be
followed when starting a new installation or when
restarting and installation in which the pump or
motor has been removed from the system.

Prior to starting the pump, make certain all system
components (reservoir, fittings, etc.) are clean prior
to filling with fluid.

Fill the reservoir with recommended fluid which
should be filtered prior to entering the reservoir.

Start the engine and idle at the lowest possible RPM.
With the bypass valve closed, slowly move the dis-

placement control in both the forward and reverse
directions. As air is purged from the unit, the oil level
in the reservoir will drop and bubbles may appear in
the fluid. Refill the reservoir as necessary.

Place the steering levers in the neutral position and

WARNING

TO AVOID INJURY FROM EQUIPMENT GROUND

TRAVEL AND MOVEMENT DURING

START-UP PROCEDURE:

DO NOT START OR JOG ENGINE UNTIL:

● PUMP IS IN NEUTRAL POSITION

● DRIVE WHEELS ARE RAISED OFF THE

GROUND.

● EQUIPMENT IS SECURELY BLOCKED-UP TO

KEEP WHEELS FROM GROUND CONTACT.

● PTO AND OTHER WORK FUNCTIONS ARE

DISCONNECTED.

● KEEP HANDS, HAIR AND CLOTHING AWAY

FROM ROTATING BLADES.

open the bypass valve. Slowly move the steering
levers in both the forward and reverse directions to
purge the air from the closed circuit.

Close the bypass valve and run the unit in both direc­tions for several minutes until any remaining air is
purged from the unit. Refill the reservoir as necessary.

Stop the engine, check for and correct any fluid leaks,
and check the reservoir level. Add fluid if necessary.
The transmission is now ready for operation.

HYDROSTATIC MAINTENANCE

Check the reservoir daily for proper fluid level.
The pump and motor units normally do not require

regular fluid changes. The system filter should be
changed after the first 50 hours of break-in, then
every 250 hours thereafter. The fluid and filter should
be changed and the system cleaned if the fluid
becomes contaminated with foreign matter (water,
dirt, etc.).

PARKING BRAKE ADJUSTMENT

Check to make sure brake is adjusted properly.
Force on the brake handle to lock the brake in place

should be 20 pounds. To adjust the brake tension,
shorten or lengthen the horizontal brake linkage.

If further adjustment is needed at each individual
wheel brake:

1. Engage the brake lever (lever up).

2. Remove the wheel from the side needing adjusting.

3. With the brake engaged the spring length should
be 3-1/2” (measured to the inside of the spring loops).

4. If the spring length is different, shorten or lengthen
the vertical brake linkage.

5. Reinstall the wheel and torque the lug nuts.

Pump Drive Belt Tension Adjustment

1. Stop engine and remove key.

2. The pump drive belt tension is adjusted through a
spring loaded idler pulley.

3. Locate the eye-bolt attached to this idler spring.
The eye-bolt threads should protrude 11/16” past the
nut. If adjustment is needed tighten or loosen the eye­bolt to increase or decrease the spring tension, then
lock the front and rear nuts in place.

17

1. ENGINE IDLES POORLY:

Carburetor maladjustment_________________________________________________readjust carburetor
Improper spark plug gap _______________________________________________check and re-gap plug

2. ENGINE BACKFIRES:

Carburetor maladjustment_________________________________________________readjust carburetor

3. ENGINE RUNS BUT POWER UNIT WON’T MOVE FORWARD

Drive belt loose or broken________________________________________________re-tension or replace
Pump shift arm disconnected _____________________________________________________reconnect
Hydrostatic reservoir oil low _________________________________________________________add oil
Pump bypass valve open________________________________________________put in closed position
Hydrostatic oil filter plugged_____________________________________________________replace filter
Bad pump or motor __________________________________________________________consult dealer

4. POWER UNIT LOSES POWER OR HYDROSTAT SYSTEM OVERHEATS

Hydrostatic oil reservoir too low ______________________________________________________add oil
Pump or motor damaged _____________________________________________________consult dealer
Hydrostatic oil reservoir blowing oil out cap _________________________overfilled or water contaminated

5. ENGINE STALLS WHEN BLADES ARE ENGAGED

Operator not on seat____________________________________________________________sit on seat
Faulty interlock system _______________________________________________________consult dealer
Bad blade spindle bearing_____________________________________________________consult dealer
Deck drive belt not properly routed ___________________________________________________reroute
Blades blocked by foreign material ___________________________________________clean under deck

•See engine manual for engine adjustments

ENGINE ELECTRICAL TROUBLE SHOOTING

1. ENGINE WILL NOT TURN OVER:

Dead battery
Bad ground connection
Bad terminal connection at battery
Wiring harness plugs are not attached properly at

the key switch or the PTO switch
Bad parking brake switch
Bad PTO switch

TROUBLESHOOTING CHECK LIST

18

2. ENGINE WILL TURN OVER,
BUT WILL NOT START:

A. If there is spark at the plug:

No fuel
Bad fuel solenoid in engine

B. If there is no spark at the plug:

Make sure safety interlock system is sequenced:

PTO switch is off
Control levers in neutral position
Parking brake is on
Operator in seat

Check safety interlock switches:

Seat switch
Neutral switch

Bad ignition module on engine

SECTION IV

ASSEMBLY

19

MOUNTING SEAT

Remove either the suspension seat or the non-sus­pension seat from the cardboard container and align
the four 5/16” studs with the mounting holes on the
seat frame. Remove the fasteners from the bag of
parts and secure the seat with the 5/16” flange lock­nuts.

Attach the seat safety wires to the seat switch.

MOUNTING THE CONTROL LEVERS

Remove the lower 3/8 x 1” fasteners from the lower
control lever mounting holes. Move the control
levers into place so both levers are in line with each
other and secure with 3/8 x 1” bolt and lockwasher.

MOUNTING THE AXLE STOPS

Bush Hog provides a method to allow the front axle
to pivot freely from side to side or axle stops that
can be installed fixing the front axle to a rigid posi­tion. Shipped loose in the bag of fasteners is a left
and right axle stop. These axle stops are positoned
over the front axle according to the attached drawing
and fastened in place with 3/8 x 1-1/4” bolts. Use the
3/8” locknuts shipped on the unit.

BATTERY

Attach the positive lead to the battery.
Additional wire tie straps are shipped to secure the

wiring harness as needed.

ITEMS TO CHECK:

Check oil level in the engine (see engine manual)
Check radiator coolant fluid level in the 23 horse-

power Kohler engine (see engine manual)
Check the fluid level in the hydrostatic oil reservoir.
Check tightness of all fasteners, including bolts, lug

nuts, and setscrews.
Check tire pressure.

Seat Folded Forward

Seat Switch

5/16” Studs and
Flange Locknuts

Control Levers

Axle Stops

20

SWITCH

KOHLER ENGINE WIRING HARNESS

PARK BRAKE

18 GA

VIOLET

3 AMP

DIODE

BROWN 18 GA.

LEVER

SWITCH

NEUTRAL

GREEN

18GA.

BLACK

(NO)

SEAT

PINK

SWITCH

BLACK

ORANGE

18GA.

18GA.

ENGINE

KOHLER

CONNECTOR

18GA.

RED/BLACK

18GA.

PURPLE W/BLACK

PTO SWITCH

KOHLER OIL

PRESSURE

18GA.

GRAY/BLACK

KOHLER CYLINDER

HEAD TEMPERATURE

ORANGE/BLACK

RED 12GA.

IGNITION

SWITCH

KOHLER WATER

TEMPERATURE

BLUE 14GA.

BLUE 14GA.

CLUTCH

ELECTRIC

BLACK 18GA.

3 AMP

DIODE

NEG.

POS.

ALARM

PRESSURE

18GA.

WHITE

BROWN (18 GA)

(18 GA.)

BLUE/WHITE

WHITE (18 GA)

TEMPERATURE

LIGHTS

WARNING

18GA.

GRAY/BLACK

VIOLET

18GA

YELLOW

RED 12GA.

WHITE (18 GA)

BLUE 14GA.

10 AMP

RELAY

15 AMP

GREEN

PINK

20 AMP

18GA

RED/WHITE

RED/GREEN

ON OFF

LIGHT

HEAD

BLACK

18GA.

BLACK

VIOLET/WHITE

LIGHT

HEAD

METER

HOUR

BLACK 18GA.

BLACK (18 GA)

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.

21

DANGER

KEEP AWAY!

SHIELD MISSING FROM THIS AREA

TO AVOID SERIOUS INJURY OR DEATH,
DO NOT OPERATE WITHOUT THIS AND
ALL OTHER SHIELDS IN PLACE AND IN
GOOD CONDITION.

823324

DANGER

KEEP AWAY - ROTATING BLADES

SERIOUS INJURY OR DEATH CAN RESULT FROM

THROWN OBJECTS OR BLADE CONTACT.

• DO NOT STAND ON OR NEAR MACHINE WHEN IN OPERATION.

• KEEP HANDS AND FEET AWAY FROM UNDERNEATH CUTTER TO AVOID
SERIOUS INJURY.

• NEVER OPERATE WITHOUT DISCHARGE CHUTE OR GRASS CATCHER

ASSEMBLY IN PLACE. 823325

WARNING

ROTATING DRIVE PARTS

BENEATH

• ENTANGLEMENT WITH ROTATING DRIVE
PARTS CAN CAUSE INJURY OR DEATH.

• DO NOT OPERATE WITHOUT THIS AND
ALL OTHER SHIELDS IN PLACE AND IN
GOOD CONDITION.

823323

50012616

50012615

85020

22

WARNING

TO AVOID SERIOUS INJURY OR DEATH

DO NOT OPERATE MOWER WITHOUT DISCHARGE
SHIELD OR DEFLECTOR IN PLACE AND GOOD REPAIR.

83056

WARNING

TO AVOID SERIOUS INJURY OR DEATH,

★READ OPERATOR’S MANUAL BEFORE

OPERATING & FOLLOW ALL PRECAUTIONS.
(CONTACT DEALER FOR MANUALS)

★LOWER IMPLEMENT, STOP ENGINE AND

REMOVE KEY BEFORE DISMOUNTING.

★NO RIDERS. DO NOT OPERATE MOWER IN

VICINITY OF OTHER PERSONS.

★ALLOW NO CHILDREN OR UNQUALIFIED

PERSONS TO OPERATE EQUIPMENT.

★CLEAR MOWING AREA OF DEBRIS.

★KEEP SHIELDS AND GUARDS IN PLACE.

KEEP CLEAR OF DRIVES AND BELTS.

★SECURELY SUPPORT MOWER &

REMOVE KEY BEFORE WORKING
UNDERNEATH.

★KNOW HOW TO STOP TRACTOR AND

EQUIPMENT QUICKLY IN AN
EMERGENCY.

★BE CAREFUL ON UNEVEN TERRAIN.

DECREASE SPEED WHEN TURNING.

94134

TORQUE SPECIFICATIONS

Proper toque for American fasteners used on Bush Hog equipment.

Recommended Torque in Foot Pounds (Newton Meters).*

BOLT DIAMETER

WRENCH (IN.) “B” AND SAE SAE SAE

SIZE (IN.) “A” THREAD SIZE GRADE 2 GRADE 5 GRADE 8

7/16 1/4 - 2O UNC 6 (7) 8 (11) 12 (16)
7/16 1/4 - 28 UNF 6 (8) 10 (13) 14 (18)

1/2 5/16 - 18 UNC 11 (15) 17 (23) 25 (33)

1/2 5/16 - 24 UNF 13 (17) 19 (26) 27 (37)
9/16 3/8 - 16 UNC 20 (27) 31 (42) 44 (60)
9/16 3/8 - 24 UNF 23 (31) 35 (47) 49 (66)

5/8 7/16 - 14 UNC 32 (43) 49 (66) 70 (95)

5/8 7/16 - 20 UNF 36 (49) 55 (75) 78 (106)

3/4 1/2 - 13 UNC 49 (66) 76 (103) 106 (144)

3/4 1/2 - 20 UNF 55 (75) 85 (115) 120 (163)

7/8 9/16 - 12 UNC 70 (95) 109 (148) 153 (207)

7/8 9/16 - 18 UNF 79 (107) 122 (165) 172 (233)

15/16 5/8 - 11 UNC 97 (131) 150 (203) 212 (287)
15/16 5/8 - 18 UNF 110 (149) 170 (230) 240 (325)

1-1/8 3/4 - 10 UNC 144 (195) 266 (360) 376 (509)

1-1/8 3/4 - 16 UNF 192 (260) 297 (402) 420 (569)
1-5/16 7/8 - 9 UNC 166 (225) 430 (583) 606 (821)
1-5/16 7/8 - 14 UNF 184 (249) 474 (642) 668 (905)

1-1/2 1 - 8 UNC 250 (339) 644 (873) 909 (1232)

1-1/2 1 - 12 UNF 274 (371) 705 (955) 995 (1348)

1-1/2 1 - 14 UNF 280 (379) 721 (977) 1019 (1381)

1-11/16 1-1/8 - 7 UNC 354 (480) 795 (1077) 1288(1745)
1-11/16 1-1/8 - 12 UNF 397 (538) 890 (1206) 1444 (1957)

1-7/8 1-1/4 - 7 UNC 500 (678) 1120 (1518) 1817 (2462)

1-7/8 1-1/4 - 12 UNF 553 (749) 1241 (1682) 2013 (2728)
2-1/16 1-3/8 - 6 UNC 655 (887) 1470 (1992) 2382 (3228)
2-1/16 1-3/8 - 12 UNF 746 (1011) 1672 (2266) 2712 (3675)

2-1/4 1-1/2 - 6 UNC 870 (1179) 1950 (2642) 3161 (4283)

2-1/4 1-1/2 - 12 UNF 979 (1327) 2194 (2973) 3557 (4820)

Proper torque for metric fasteners used on Bush Hog equipment.

Recommended torque in foot pounds (newton Meters).*

WRENCH BOLT

SIZE DIA. ASTM ASTM ASTM ASTM

(mm) “A” (mm) “B” 4.6 8.8 9.8 10.9

8 5 1.8 (2.4) 5.1 (6.9) 6.5 (8.8)
10 6 3 (4) 8.7 (12) 11.1 (15)
13 8 7.3 (10) 21.1 (29) 27 (37)
16 10 14.5 (20) 42 (57) 53 (72)
18 12 25 (34) 74 (100) 73 (99) 93 (126)
21 14 40 (54) 118 (160) 116 (157) 148 (201)
24 16 62 (84) 167 (226) 181 (245) 230 (312)
30 20 122 (165) 325 (440) 449 (608)
33 22 443 (600) 611 (828)
36 24 211 (286) 563 (763) 778 (1054)
41 27 821 (1112) 1138 (1542)
46 30 418 (566) 1119 (1516) 1547 (2096)

*Use 75% of the specified torque value for plated
fasteners. Use 85% of the specificed torque

values for lubricated fasteners.

Numbers appearing on bolt heads
indicate ASTM class.

METRIC

AMERICAN

Bolt Head Markings

Wrench
Size “A”

Bolt

Diameter “B”

SAE Grade 8

(6 Dashes)

SAE Grade 2

(No Dashes)

SAE Grade 5

(3 Dashes)

Wrench
Size “A”

8.8

Bolt

Diameter “B”

23

BUSH HOG, L.L.C.

®

P.O. Box 1039 ● Selma, AL 36702-1039
Telephone [phone]