Bush Hog GHM 800, GHM 900, GHM 1800, GHM 1900, GHM 700 User Manual
BUSH HOG
®
1297
Part No. 99707
GEARDRIVE
HAY MOWERS
ASSEMBLY ● OPERATION ● MAINTENANCE
$4.00
Operator’s Manual
SERIES GHM 700, GHM 800, GHM 900
GHM 1800 & GHM 1900
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. Most of our
manuals can also be downloaded from our website at www.bushhog.com.
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.
GHM HAY MOWER
TABLE OF CONTENTS
SECTION/PARA PAGE
Warranty.......................................................3
Dealer Preparation Check List.....................4
Safety Precautions.......................................5
Federal Laws and Regulations ....................6
I. INTRODUCTION & DESCRIPTION ............7
1-1 Introduction............................................7
1-2 Description.............................................7
II. PREPARATION FOR USE...........................8
III.OPERATING INSTRUCTIONS..................10
3-1 General Safety.....................................10
3-2 Cutting Height......................................10
3-3 Transporting.........................................10
3-4 Breakaway Latch.................................10
3-5 Operation.............................................11
3-6 Swath Board .......................................11
3-7 Cutter Bar Helper Spring
Adjustment...........................................12
3-8 Unhitching From Tractor and Storage........12
SECTION/PARA PAGE
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
hauling of the product for the purpose of performing a warranty obligation or inspection.
2
IV.MAINTENANCE.........................................12
4-1 Maintenance Check List ......................12
4-2 Lubrication...........................................13
4-3 Blade Replacement .............................14
4-4 Belt Adjustment....................................14
4-5 Belt Replacement ................................14
4-6 Spindle Housing Removal and
Reassembly.........................................14
4-7 Cutter Bar Removal.............................15
4-8 Cutter Bar Installation..........................16
4-9 Troubleshooting...................................17
V. ASSEMBLY................................................19
Safety Decals.............................................21
Torque Specifications.................................23
UNDERSTAND SIGNAL WORDS
DANGER: Indicates an imminently
hazardous situation which, if not avoided, will result in death or serious injury.
This signal word is to be limited to the
most extreme situations.
WARNING: Indicates a potentially
hazardous situation which, if not
avoided, could result in death or
serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury. It
may also be used to alert against
unsafe practices.
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 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 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 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
3
DEALER PREPARATION CHECK LIST
GHM HAY MOWER
BEFORE DELIVERING MACHINE — The following check list should be completed.
Use the Operator’s Manual as a guide.
❒ 1. Assembly completed.
❒ 2. Gearbox filled with oil.
❒ 3. All fittings lubricated.
❒ 4. All shields in place and in good condition.
❒ 5. All fasteners torqued to specifications given in Torque Chart.
❒ 6. All decals in place and readable. (See decal page.)
❒ 7. Overall condition good (i.e. paint, welds)
❒ 8. Operators manual has been delivered to owner and he has been instructed
on the safe and proper use of the mower.
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.
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.
1. Read the Operator’s Manual. 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 mower. 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. Use a piece of cardboard or wood rather than hands to search for hydraulic leaks. Escaping hydraulic oil
under pressure can penetrate skin. If fluid is injected into the skin, it must be surgically removed within a
few hours by a doctor familiar with this form of injury or gangrene may result.
9. Do not operate without all guards and shields in place and in good condition.
10. Stop PTO, lower implement to ground, place tractor transmission in neutral or park, set parking brake, stop
tractor engine, remove ignition key and wait for all motion to completely stop before leaving the tractor.
11. Keep hands and feet away from blades.
12. This mower is not to be operated in any area where people may be present unless all
sides of the unit are enclosed by a curtain guard that is in good repair.
13. 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.
14. When performing adjustments or maintenance on the mower, first lower it to the ground or block it securely
at a workable height.
15. Never stand between tractor and mower while tractor is being backed to the cutter hitch.
16. Reduce speed when transporting mower to avoid bouncing and momentary loss of steering.
17. Use tractor flashing warning lights, day or night, when transporting mower on road or highways unless prohibited by law.
18. Pin transport lock to retain cutter bar in transport position.
19. Lower mower to ground before unhitching from tractor.
20. In the event that someone other than yourself will operate this equipment we firmly suggest that all
SAFETY references be discussed prior to operation.
21. It is recommended that tractor be equipped with Rollover Protective System (ROPS) enclosed cab, and a
seat belt.
5
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.)
EMPLOYEE TRACTOR OPERATING INSTRUCTIONS:
1. Securely fasten your seat belt if the tractor has a
ROPS.
2. Where possible, avoid operating the tractor near
ditches, embankments, and holes.
3. Reduce speed when turning, crossing slopes, and
on rough, slick, or muddy surfaces.
4. Stay off slopes too steep for safe operation.
5. Watch where you are going, especially at row
ends, on roads, and around trees.
6. Do not permit others to ride.
7. Operate the tractor smoothly - no jerky turns,
starts, or stops.
8. Hitch only to the drawbar and hitch points recom-
mended by tractor manufacturers.
9. When tractor is stopped, set brakes securely and
use park lock if available.
6
7
SECTION 1
INTRODUCTION AND DESCRIPTION
1-1 INTRODUCTION
We are pleased to have you as a Bush Hog customer. Your GHM hay 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 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 with implement
properly attached to tractor.
1-2 DESCRIPTION
The GHM (Figure 1-1) is intended for cutting hay
and grass in a clean maintained area. A breakaway
mechanism built into the three point hitch allows cutter bar to pivot back if a stationary object is hit. The
cutter bar consists of individual spindle assemblies
driven from the main gearbox by a gear train. An
optional overrunning clutch is available to allow
“coast down” of blades when PTO is disengaged.
Curtain Support Assembly
Transport Lock
Swathboard
Crop Divider Cutter Bar
Gearbox
Hitch Breakaway
Parking Stand
Helper Spring Assembly
Three Point Hitch
Figure 1-1 GHM Major Components (Safety Curtain Removed To Show Details Only)
HM 900 Shown
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