BUSH HOG

®

RZ 160

Rotary Cutter

Operator’s Manual

1007

OPERATION

l

MAINTENANCE

$4.00

50060440

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 WITH-

OUT 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.

1

RAZORBACK ROTARY CUTTER

TABLE OF CONTENTS

SECTION/PARA PAGE

Warranty ................................................3

Dealer Preparation Check List ...............4

Safety Alert Symbols..............................5

Safety Precautions.................................6

Federal Laws .........................................7

I. INTRODUCTION & DESCRIPTION ......8

1-1 Introduction ......................................8

1-2 Description...........................................8

II. PREPARATION FOR USE ....................9

III.OPERATING INSTRUCTIONS............10

3-1 General Safety...............................10

3-2 Adjusting for Work .........................10

3-3 Operation ...........................................11

SECTION/PARA PAGE

IV.MAINTENANCE ..................................12

4-1 Maintenance Check List ................12

4-2 Lubrication .....................................12

4-3 Blade Replacement ......................13

4-4 Shear Bolt Replacement................13

4-5 Blade Holder & Gearbox Removal ......13

4-6 Blade Holder & Gearbox Installation..13

4-7 Troubleshooting .............................14

V. ASSEMBLY.........................................15

5-1 Base Unit Assembly......................15

5-2 Front & Rear Shielding Installation15

Safety Decals ......................................16

Torque Specifications..........................17

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

LIMITED WARRANTY

OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

Bush Hog warrants to the original purchaser of any new Bush Hog equipment, purchased from an authorized

Bush Hog dealer, that the equipment be free from defects in material and workmanship for a period of one (1) year from date of retail sale. This warranty does not apply to commercial, state, or municipality use. 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 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 judgement 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.

OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

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

MAKE CERTAIN THE WARRANTY REGISTRATION

CARD HAS BEEN FILED WITH BUSH HOG/

SELMA, ALABAMA.

SERIAL NUMBER

DATE OF RETAIL SALE

3

DEALER PREPARATION CHECK LIST

RAZORBACK ROTARY CUTTERS

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

Use the Operator’s Manual as a guide.

r

1. Assembled completed.

r

2. Gearbox filled with oil.

r

3. All fittings lubricated.

r

4. All shields in place and in good condition.

r

5. All fasteners torqued to specifications given in Torque Chart.

r

6. All decals in place and readable. (See decal page.) r

7. Overall condition good (i.e. paint, welds) r

8. Operators manual has been delivered to owner and he has been instructed on the safe and proper use of the cutter.

r

9. Purchaser or dealer elects to delete deflectors. (front belting, rear bands, front and rear chains)

Explanation:

WARNING

Deflector kits or chain shielding is standard equipment. Must be used for all non-agricultural uses or in areas where the possibility of thrown objects could be hazardous to persons or property.

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.

WARRANTY REGISTRATION AND DELIVERY REPORT

It is the responsibility of the Dealer to do the following:

• Complete the Warranty Registration and Delivery Report

• Return the pre-addressed card copy to Bush Hog, L.L.C.

• Retain pink copy for dealership records

4

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

5

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 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.

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. Lower implement to ground, stop tractor engine, apply parking brake, and allow blades to completely stop before leaving the tractor.

11. Keep hands and feet away from blades.

12. Use 5/16” double row highway chains for all roadside mowing operations.

13. Do not operate the cutter in the vicinity of other persons without enclosed sides, permanent bands, highway chains or other factory approved discharge shields in place and in good working order.

14. 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.

15. When performing adjustments or maintenance on the cutter, first lower it to the ground or block it securely at a workable height.

16. Never stand between tractor and cutter while tractor is being backed to the cutter hitch.

17. Reduce speed when transporting cutter to avoid bouncing and momentary loss of steering.

18. Use tractor flashing warning lights, day or night, when transporting cutter on road or highways unless prohibited by law.

19. In the event that someone other than yourself will operate this equipment we firmly suggest that all

SAFETY references be discussed prior to operation.

20. Use ROPS (Rollover Protective Structures) and seat belt equipped tractors for mowing operations.

6

IMPORTANT FEDERAL LAWS AND REGULATIONS* CONCERNING

EMPLOYERS, EMPLOYEES AND OPERATIONS.

*(This section is intended to explain in broad terms the concept and effect of the following federal laws and regulations. It is not intended as a legal interpretation of the laws and should not be considered as such).

U.S. Public Law 91-596 (The Williams-Steiger Occupational and Health Act of 1970) OSHA

This Act Seeks:

“...to assure so far as possible every working man and woman in the nation safe and healthful working conditions and to preserve our human resources...”

DUTIES

Sec. 5 (a) Each employer—

(1) shall furnish to each of his employees employment and a place of employment which are free from recognized hazards that are causing or are likely to cause death or serious physical harm to his employees;

(2) shall comply with occupational safety and health standards promulgated under this Act.

(b) Each employee shall comply with occupational safety and health standards and all rules, regulations and orders issued pursuant to this Act which are applicable to his own actions and conduct.

OSHA Regulations

Current OSHA regulations state in part: “At the time of initial assignment and at least annually thereafter, the employer shall instruct every employee in the safe operation and servicing of all equipment with which the employee is, or will be involved.” These will include (but are not limited to) instructions to:

Keep all guards in place when the machine is in operation;

Permit no riders on equipment;

Stop engine, disconnect the power source, and wait for all machine movement to stop before servicing, adjusting, cleaning or unclogging the equipment, except where the machine must be running to be properly serviced or maintained, in which case the employer shall instruct employees as to all steps and procedures which are necessary to safely service or maintain the equipment.

Make sure everyone is clear of machinery before starting the engine, engaging power, or operating the machine.

EMPLOYEE TRACTOR OPERATING INSTRUCTIONS:

1. Securely fasten your seat belt if the tractor has a

ROPS.

2. Where possible, avoid operating the tractor near ditches, embankments, and holes.

5. Watch where you are going, especially at row ends, on roads, and around trees.

6. Do not permit others to ride.

3. Reduce speed when turning, crossing slopes, and on rough, slick, or muddy surfaces.

7. Operate the tractor smoothly - no jerky turns, starts, or stops.

8. Hitch only to the drawbar and hitch points recommended by tractor manufacturers.

4. Stay off slopes too steep for safe operation.

9. When tractor is stopped, set brakes securely and use park lock if available.

Child Labor Under 16 Years Old

Some regulations specify that no one under the age of 16 may operate power machinery. It is your responsibility to know what these regulations are in your own area or situation. (Refer to U.S. Dept. of

Labor, Employment Standard Administration, Wage & Home Division, Child Labor Bulletin #102.)

7

SECTION I

INTRODUCTION AND DESCRIPTION

1-1 INTRODUCTION

We are pleased to have you as a Bush Hog customer. Your Razorback 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 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 in this manual to right, left, front, rear, top, and bottom are as viewed as facing the direction of forward travel with implement properly attached to tractor.

1-2 DESCRIPTION

The Razorback Rotary Cutters (Figure 1-1) are light duty cutters intended for cutting grass and small brush up to 1” diameter. Each cutter has two 3/8 x 3” blades that are free-swinging to reduce the shock of impact when a stationary object is hit. A 1/2 x 3”

Grade 2 shear bolt protects the gearbox and driveline from damage. The 40 HP gearbox is designed for 540 RPM input speed giving the blades a 12,468 ft./min. tip speed. Front and rear discharge shields are included as standard equipment. (Note: Dealer or purchaser may elect to delete at their option)

Total weight of the machine is 450 lbs.

Figure 1-1 Major Components

Tailwheel

A-Frame

Gearbox

Rear Chains

Driveline

8

Front Chains

SECTION II

PREPARATION FOR USE

NOTE

Tractor should have 25 -40 PTO horsepower.

It is recommended that front end ballast, wheel weights and/or fluid in tires be used to increase stability.

F. Hold driveline sections parallel to each other and check for minimum 5 inches (15cm) overlap.

(Figure 2-2) If driveline has been marked for cutting, overlap will be the distance between two marks. If driveline has less than minimum overlap, do not use.

Contact authorized Bush Hog dealer.

A. Attach cutter to Cat. I Standard or Cat. I Quick

Hitch 3-point hitch per tractor operator’s manual. Do not connect driveline at this time.

NOTE

Due to the many variations in tractor/implement hitch points and corresponding differences in distances between tractor PTO shafts and implement input shafts, drivelines may need to be shortened as described in the following steps:

Figure 2-2

Minimum Overlap

B. Raise and lower cutter to determine position with shortest distance between the tractor PTO shaft and gearbox input shaft. Shut down tractor leaving cutter in position of shortest distance. Securely

block cutter in position. (Figure 2-1)

C. Pull driveline apart. Attach outer (female) section to tractor PTO shaft. Pull on driveline section to be sure that yoke locks into place.

D. Hold driveline sections parallel to each other to determine if too long. Each section should end approximately 3 inches (76mm) short of reaching universal joint shield on opposite section. If too long, measure 3 inches (76mm) back from universal joint shield and mark on opposite section. (Figure 2-1).

Do this for both sections.

NOTE

If driveline is the correct length, omit the following sreps “G” through “J” and proceed to step “K”.

G. Clamp driveline in a well padded vice to prevent damage to the shield. Cut of shield where marked. (Figure 2-3)

Figure 2-3

Figure 2-1

E. Raise and lower cutter to determine position with greatest distance between PTO shaft and gearbox input shaft. Shut down tractor leaving cutter in position of greatest distance. Securely block cutter in

position. (Figure 2-1)

9

H. Using cut of section of shield as a guide, cut shaft the same amount. (Figure 2-4)

I. Repeat steps “G” and “H” to other driveline section.

J. Deburr ends of driveline sections and clean away all chips and filings. (Figure 2-5)

K. Apply multi-purpose grease to inside of outer

(female) driveline section. Assemble driveline and install on tractor and cutter. Pull on each driveline

Figure 2-4 section to be sure yokes lock into place. Make certain driveline shielding is in place and in good condition.

L. Adjust lower lift arm(s) to level cutter right to left.

Refer to tractor operator's manual for instructions.

M. Connect and/or adjust stabilizer bars, sway blocks, sway chains or equivalent to prevent side sway. Refer to tractor operator’s manual.

Figure 2-5

SECTION III

OPERATING INSTRUCTIONS

3-1 GENERAL SAFETY

Only qualified people should operate this machine.

Operator should wear hard hat, safety glasses and safety shoes. Use ROPS (Rollover Protective

Structures) and seat belt equipped tractors or mowing operations. Before beginning operation, clear work area of objects that may be picked up and thrown. Check for ditches, stumps, holes or other obstacles that could upset tractor or damage cutter.

Always turn off tractor engine, set parking brake, and allow cutter blades to come to a complete stop before dismounting tractor.

A. Raise cutter off ground using tractor 3-point lift. Turn off tractor engine.

B. SECURELY BLOCK CUTTER INTO POSI-

TION.

WARNING

DO NOT GET UNDER CUTTER UNLESS IT

IS SECURELY BLOCKED IN POSITION.

ACCIDENTAL FALL COULD CAUSE SERI-

OUS INJURY OR DEATH.

3-2 ADJUSTING FOR WORK

The cutter should be operated at the highest position which will give desired cutting results. This will help prevent the blades from striking the ground, reducing blade wear and undue strain on the machine. For best results under heavier cutting conditions, always tilt the cutter approximately 2 inches (51mm) lower in the front. This tilt decreases horsepower requirements and increases potential ground speed. When fine shredding is desired, adjust cutter deck level or slightly lower in the rear. This will keep the foliage under cutter until thoroughly shredded. More power is required for shredding.

The cutting height is adjustable from 2 -12 inches.

To adjust, proceed as follows:

C. Remove bolt securing tailwheel frame to adjusting strap. (Figure 3-1)

D. Adjust tailwheel to desired position. Secure with bolt, lockwasher and nut.

E. Lower cutter to work position.

F. Adjust tractor 3-point hitch top link so that there will be a small amount of slack in the yoke linkage to allow deck to float during operation. (Figure 3-2) The pivot-arm fork allows the cutter to follow ground contours for a closer cut.

10

Figure 3-1 Cutting Height Adjustment

Height Adjusting Strap

Figure 3-2

Top Link allows Cat. I,

Standard and Quick Hitch

Pivot Arm Fork

3-3 OPERATION

A. Perform BEFORE EACH USE maintenance listed in paragraph 4-1.

B. Start tractor per tractor operator’s manual.

C. Raise/lower 3-point hitch to place cutter in working position,

D. Look to be sure no one is near cutter. WITH

TRACTOR AT IDLE SPEED, SLOWLY ENGAGE PTO

DRIVE. This will prolong life of driveline components.

11

DANGER

STAY CLEAR OF ROTATING DRIVELINE

DO NOT OPERATE WITHOUT DRIVELINE

SHIELDS IN PLACE AND IN GOOD CONDI-

TION. FAILURE TO HEED THESE WARN-

INGS MAY RESULT IN PERSONAL INJURY

OR DEATH.

DANGER

ROTATING CUTTER BLADES. STAND

CLEAR UNTIL ALL MOTION HAS STOPPED.

TO AVOID AN ACCIDENTAL FALL FROM

TRACTOR AND POSSIBLE INJURY BY

MOWER, IT IS RECOMMENDED THAT

TRACTOR BE EQUIPPED WITH ROLLOVER

PROTECTIVE SYSTEM (ROPS) AND A SEAT

BELT BE USED BY THE OPERATOR FOR

ALL MOWING OPERATIONS.

E. Place tractor in gear and proceed forward.

Advance the throttle to 540 PTO RPM. Tractor forward speed should be controlled by gear selection, not engine speed. For maximum cutting efficiency, forward speed should allow cutter to maintain a constant maximum blade speed. If cutter stalls or tractor engine bogs, disengage PTO. Before re-engaging

PTO, position cutter in a cut area and reduce tractor throttle to idle. If cutter continuously stalls, select lower tractor gear and/or increase cutting height.

Blade rotation is counterclockwise causing cut material to discharge to the left side of cutter forming a windrow. To shred and dissipate this window, tractor should be driven in a counterclockwise direction throwing material to the uncut area. The windrowed material will be recut on each new pass. Tractor tire tracks are cut more efficiently when tractor is traveling in a clockwise direction especially when cutting height is high. Counterclockwise tractor travel requires more horsepower. Larger brush should be cut in the center of cutter. Always cut up and down the face of slopes, never across.

WARNING

ALL ROTARY CUTTERS CAN DISCHARGE

OBJECTS AT HIGH SPEEDS WHICH

COULD RESULT IN SERIOUS INJURY TO

BYSTANDERS OR PASSERS-BY.

THEREFORE, THIS CUTTER IS NOT TO BE

OPERATED ALONG HIGHWAYS OR IN ANY

AREA WHERE PEOPLE MAY BE PRESENT

UNLESS ALL SIDES OF THE UNIT ARE

ENCLOSED BY PERMANENT BANDS THAT

ARE IN GOOD REPAIR.

SECTION IV

MAINTENANCE

4-1 MAINTENANCE CHECK LIST

Perform scheduled maintenance as outlined below.

Lower machine to ground, turn off tractor and set parking brake before doing maintenance inspections or work. All bolts should be torqued as recommended in the Torque Specifications unless otherwise indicated.

WARNING

DO NOT GET UNDER CUTTER UNLESS IT

IS SECURELY BLOCKED IN POSITION.

ACCIDENTAL FALL COULD CAUSE SERI-

OUS INJURY OR DEATH.

AFTER EACH USE

1. Clean all debris from machine especially underside of deck. When cleaning underside of deck,

SECURELY BLOCK MACHINE INTO POSITION.

(Figure 3-1)

4-2 LUBRICATION (Figure 4-1, & 4-2)

NOTE

The multi-purpose grease referenced in this section is an NLGI Grade 2 type grease.

BEFORE EACH USE

BEFORE EACH USE

1. Check tractor tire air pressure. Refer to tractor operator’s manual.

2. Check blades and spindles to be sure that no foreign objects such as wire or steel strapping bands are wrapped around them.

3. Check blade bolts for tightness. Tighten to 420 ft./lbs. (569 Nm)

4. Inspect blades for wear. Replace if necessary per paragraph 4-3. Always replace both blades with blades equal in weight. Use only genuine Bush

Hog replacement blades.

5. Make certain bands are in good repair.

6. Make certain driveline shields are in place and in good repair.

7. Inspect wheel for wear, damage or foreign objects. Repair or replace if necessary.

8. Perform BEFORE EACH USE lubrication per paragraph 4-2.

9. During operation, listen for abnormal sounds which might indicate loose parts, damaged bearings, or other damage. Locate and repair or contact your dealer.

1. Driveline Universal Joints - Apply multi-purpose grease with grease gun.

2. Driveline Guard - Apply 2-3 shots of multi-purpose grease with grease gun to plastic fitting.

3. Driveline - Disconnect PTO driveline, pull two sections apart, and apply thin coat of multi-purpose grease to inside of outer female section.

Re-asemble sections and install. Pull each section to be sure driveline and shields are securely connected. Make certain PTO shielding is in good condition.

4. Wheel Pivot Tubes - Apply multi-purpose grease with grease gun.

5. Yoke - Apply multi-purpose grease to grease fitting on shear bolt yoke. IMPORTANT: THIS FIT-

TING MUST BE GREASED REGULARLY TO

PREVENT YOKE FROM SEIZING TO INPUT

SHAFT RENDERING SHEAR BOLT USELESS.

6. Gearbox - Check oil level by removing oil level check plug on rear of gearbox. Ad EP80W-90 gear oil if necessary to bring oil to check plug hole. Capacity is 18 oz.

Figure 4-2 (2) Before Each Use EG DRIVELINE

Figure 4-1 Lubrication

(1) Before

Each Use

(6) Before Each Use

(4) Before

Each Use

(5) Before

Each Use

(3) Before Each Use

BINACCHI DRIVELINE

To remove yoke shield, turn slotted head 90° with screwdriver, remove turn screw and slide cover back.

(2) Before Each Use

(1) Before

Each Use

(5) Before

Each Use

(3) Before Each Use

To remove yoke, turn slotted head 180 ° with screwdriver, slide cover back.

12

4-3 BLADE REPLACEMENT

It is not necessary to remove the complete blade holder assembly to replace the blades. Blade bolts are accessible through a hole in the top of the cutter deck. To maintain proper balance always replace both blades on a blade holder using two blades having the same weight. Use only genuine Bush Hog replacement blades. (Figure 4-3)

Figure 4-3 Shear Bolt Blade Bolt

WARNING

FAILURE TO USE CORRECT SIZE SHEAR

BOLT MAY CAUSE PERSONAL INJURY OR

DEATH.

WARNING

FAILURE TO INSTALL RETAINING CLIP

WILL ALLOW DRIVELINE TO SWING

FREELY IF BOLT IS SHEARED CAUSING

POSSIBLE INJURY OR DEATH.

D. Install new 1/2 x 3” Grade 2 shear bolt and locknut. Refer to torque chart on page 15. Higher grade shear bolt can cause damage to driveline or gearbox.

E. Lock yoke shield securely into place.

4-5 BLADE HOLDER & GEARBOX

REMOVAL

A. Raise cutter using tractor 3-point lift. Turn off tractor engine.

B. BLOCK CUTTER SECURELY INTO POSITION.

WARNING

DO NOT GET UNDER CUTTER UNLESS IT

IS SECURELY BLOCKED IN POSITION.

ACCIDENTAL FALL COULD CAUSE SERI-

OUS INJURY OR DEATH.

A. Raise cutter and SECURELY BLOCK IN

POSITION.

B. Remove nuts from blade bolts using a 1-5/16” socket. Remove blades, bolts and washers.

C. Inspect blade bolt shoulder for wear. Replace if necessary. When replacing blade bolt always replace both bolts.

D.Assemble new blades to blade holder using blade bolts, nuts and lockwashers. Tighten nuts to

420 ft./lbs. (569 Nm) It may be necessary to hold blade bolt with pipe wrench. Strike head of bolt several times with a hammer, then retighten.

E. Check to be sure blades swing 360° freely. If blades will not swing freely, remove, locate problem, and repair. Operating cutter when blades will not swing freely will cause excessive vibration, damaging implement.

WARNING

DO NOT GET UNDER CUTTER UNLESS IT

IS SECURELY BLOCKED IN POSITION.

ACCIDENTAL FALL COULD CAUSE SERI-

OUS INJURY OR DEATH.

4-4 SHEAR BOLT REPLACEMENT

A. Refer to Figure 4 and slide yoke shield back.

B. Remove sheared bolt from input shaft using hammer and punch.

C. Inspect retaining clip to make certain it is securely installed in groove.

13

C. Remove cotter pin and blade holder retaining nut. Wear heavy work gloves to protect hands from sharp edges.

D. Grasp blade holder and pull off shaft. If necessary, align blade bar with access hole in top of deck and drive off with hammer and pipe. Care should be taken not to damage threads on blade bolt.

E. Press all three tabs and slide yoke shield back.

(Figure 4-2)

F. Remove shear bolt and retaining clip. Slide yoke off gearbox input shaft. (Figure 4-3)

G. Remove nuts securing gearbox to deck.

Remove gearbox.

4-6 BLADE HOLDER AND GEARBOX

INSTALLATION

A. Raise cutter using tractor 3-point lift. Turn off tractor engine.

B. BLOCK CUTTER SECURELY INTO POSITION.

WARNING

DO NOT GET UNDER CUTTER UNLESS IT IS

SECURELY BLOCKED IN POSITION. ACCI-

DENTAL FALL COULD CAUSE SERIOUS

INJURY OR DEATH.

C. Attach gearbox to cutter deck using bolts and flange nuts.

D. Install blade holder onto gearbox securing with castellated nut and flat washer. Torque nut to 350 ft./lbs. (475 Nm). Wear heavy work gloves to protect hands from sharp edges.

E. Install cotter pin to retain nut. It may be necessary to slightly tighten nut to install cotter pin.

F. Slide driveline yoke onto gearbox input shaft.

Install retaining clip and shear bolt.

WARNING

FAILURE TO INSTALL RETAINING CLIP

WILL ALLOW DRIVELINE TO swing FREELY

IF BOLT IS SHEARED CAUSING POSSIBLE

INJURY OR DEATH.

G. Lock yoke shield securely into place.

H. Fill gearbox with oil per paragraph 4-2.

4-7 TROUBLESHOOTING

Troubleshooting procedures are listed in Table 4-2.

If the problem cannot be solved or replacement parts are necessary, contact your authorized Bush

Hog dealer.

Please have ready your machine name, model number, serial number, purchase date and exact cause or description of problem.

PROBLEM

Uneven Cut

Stripping or

Windrowing

Noisy Cutter

Rapid blade wear

(cutting edge)

Rapid blade wear

(bolt hole)

Cutter vibration

TABLE 4-2 GENERAL TROUBLESHOOTING

PROBABLE CAUSE

Cutter not level side to side or front to rear

Worn or bent blades

Possible build up of material under cutter

Cutter not level

Worn blades

Cutter not being operated at rated RPM speed

Loose components

Low oil in gearbox

Blade contacting the ground

Cutter not being operated at rated RPM speed

Cutter not being operated at rated RPM speed

Blades have unequal weight

Blades not swinging free

REMEDY

Refer to SECTION II.

Replace blades per paragraph 4-3.

Clean cutter.

Refer to SECTION II.

Replace per paragraph 4-3.

Set tractor throttle for proper

PTO speed during operation.

Check all bolts for tightness per

Torque Specifications.

Check for proper oil level

Refer to paragraph 4-2.

Adjust cutter to operate at a height that will eliminate ground contact.

Set tractor for proper

PTO speed during operation.

Set tractor throttle for proper

PTO speed during operation.

Replace blades with matched set.

Repair / replace blades and / or blade bolts.

14

Figure 5-1

Tailwheel

Assembly

Yoke

Halves

SECTION V

DEALER ASSEMBLY

Pivot

Arm

Figure 5-2

5/8” x 2” Capscrews,

Bushings & Locknuts

Yoke

Halves

Pivot

Arm

Driveline

Mast Strut

5-1 BASE UNIT ASSEMBLY

A. Fasten the mast struts to fronts of strongbacks using 7/8 x 3” bolts, nuts and jamnuts. Leave nuts just loose enough to allow struts to pivot.

Tighten jamnuts securely.

B. Remove fasteners from the pivot arm and yoke halves. Assemble the pivot arm link to the yoke halves using 5/8” x 2” capscrews, bushings and locknuts as shown in Figure 5-2. The yoke halves will be fastened later to the strongbacks using the same 5/8” x 2” capscrews that fasten the tailwheel frame to the strongbacks.

C. Install caster fork and wheel assembly onto tailwheel frame securing with roll pin.

D. Attach adjusting strap to cutter deck using a

5/8 x 1-1/2” bolt, lockwasher and nut.

E. Attach tailwheel asembly and yoke halves to cutter deck using two 5/8 x 2” bolts, bushings, flatwashers and locknuts. Do not overtighten nuts to allow assembly to pivot.

F. Secure tailwheel assembly to adjusting strap using a 5/8 x 1-1/2” bolt, lockwasher and nut.

G. Attach driveline to gearbox using a 1/2 x 3”

Grade 2 bolt and locknut - supplied in gearbox shaft.

H. Fill gearbox with 18 ozs. EP80W-90 gear oil.

5-2 FRONT AND REAR SHIELDING

INSTALLATION

A. Attach rear chain assemblies to rear of cutter using 14 3/8 x 1” bolts, flatwashers, and locknuts.

(Figure 5-3)

B. Attach front chain assembly to front of cutter using (9) 3/8 x 1” bolts, (18) flatwashers, and (9) locknuts. (Figure 5-4)

Figure 5-4

Mast Strut

7/8” x 3” Bolt

Jamnut

Nut

Figure 5-3

Yoke

Halves

5/8 x 2” Bolt, Bushing,

Flatwasher & Nut

Adjusting Strap Roll Pin

Caster Fork

Tailwheel Frame

Rear Chains

Front Chains

15

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.

50029419

50029419

50029417

78608

16

78786

Wrench

Size “A”

AMERICAN

Bolt Head Markings

TORQUE SPECIFICATIONS

Proper toque for American fasteners used on Bush Hog equipment.

Recommended Torque in Foot Pounds (Newton Meters).*

W R E N C H

S IZ E (IN .) “ A ”

B O L T D IA M E T E R

(IN .) “ B ” A N D

T H R E A D S IZ E

S A E

G R A D E 2

S A E

G R A D E 5

S A E

G R A D E 8

SAE Grade 2

(No Dashes)

SAE Grade 5

(3 Dashes)

Bo lt ete r “

B”

Di am

SAE Grade 8

(6 Dashes)

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)

6 (7)

6 (8)

11 (15)

13 (17)

20 (27)

23 (31)

32 (43)

36 (49)

49 (66)

55 (75)

70 (95)

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

7/8 - 14 UNF

1 - 8 UNC

1 - 12 UNF

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

1-1/2

1-1/2

1-11/16

1-11/16

1-7/8

1-7/8

7/8

15/16

15/16

1-1/8

1-1/8

1-5/16

1-5/16

1-1/2

2-1/16

2-1/16

2-1/4

2-1/4

5/8

5/8

3/4

3/4

7/8

7/16

7/16

1/2

1/2

9/16

9/16

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)

8 (11)

10 (13)

17 (23)

19 (26)

31 (42)

35 (47)

49 (66)

55 (75)

76 (103)

85 (115)

109 (148)

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)

12 (16)

14 (18)

25 (33)

27 (37)

44 (60)

49 (66)

70 (95)

78 (106)

106 (144)

120 (163)

153 (207)

METRIC

Wrench

Size “A” 8.8

Bolt

Diameter “B”

Numbers appearing on bolt heads indicate ASTM class.

*U s e 7 5 % o f th e s p e c ifie d to rq u e v a lu e fo r p la te d fa s te n e rs . U s e 8 5 % o f th e s p e c ifie d to rq u e v a lu e s fo r lu b ric a te d fa s te n e rs .

Proper torque for metric fasteners used on Bush Hog equipment.

Recommended torque in foot pounds (newton Meters).*

—WRENCH

SIZE

(mm) “A”

8

10

13

16

30

33

36

41

46

18

21

24

20

22

24

27

30

12

14

16

BOLT

DIA.

(mm) “B”

5

6

8

10

ASTM

4.6

1.8 (2.4)

3 (4)

7.3 (10)

14.5 (20)

25 (34)

40 (54)

62 (84)

122 (165)

211 (286)

418 (566)

ASTM

8.8

74 (100)

118 (160)

167 (226)

325 (440)

443 (600)

563 (763)

821 (1112)

1119 (1516)

ASTM

9.8

5.1 (6.9)

8.7 (12)

21.1 (29)

42 (57)

73 (99)

116 (157)

181 (245)

ASTM

10.9

6.5 (8.8)

11.1 (15)

27 (37)

53 (72)

93 (126)

148 (201)

230 (312)

449 (608)

611 (828)

778 (1054)

1138 (1542)

1547 (2096)

17

P.O. Box 1039 l

Selma, AL 36702-1039

Telephone (334) 874-2700 l www.bushhog.com