BUSH HOG ® 280 SERIES ROTARY CUTTERS Operator’s Manual ASSEMBLY ● OPERATION ● MAINTENANCE 199 $4.00 Part No.
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.
280 SERIES ROTARY CUTTERS 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 2-1 Attaching To Tractor ......................
BUSH HOG® MODEL 280 SERIES 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. Model 280 gearboxes are covered by a two (2) year limited warranty period.
DEALER PREPARATION CHECK LIST 280 SERIES ROTARY CUTTERS BEFORE DELIVERING MACHINE — The following check list should be completed. Use the Operator’s Manual as a guide. ❒ ❒ ❒ ❒ ❒ ❒ ❒ ❒ ❒ ❒ 1. Assembled 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. Slip clutches have been checked for proper operation. 7. All decals in place and readable. (See decal page.) 8.
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.
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: “...
SECTION I INTRODUCTION AND DESCRIPTION Figure 1-1 Major Components 1-1 INTRODUCTION We are pleased to have you as a Bush Hog customer. Your 280 Series 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.
SECTION II PREPARATION FOR USE QUICK HITCH ASSEMBLY 2-1 ATTACHING TO TRACTOR 5/8 X 5-1/2” Capscrews w/ 2-3/8” Bushing WARNING NEVER STAND BETWEEN TRACTOR AND CUTTER WHILE TRACTOR IS BEING BACKED TO HITCH. WARNING 1 x 4-1/2” Capscrew w/ 1-1/4” Bushing 3/4 x 4” Capscrew w/ 1” Bushing 3/4 x 2-1/2” Capscrews w/ 1” Bushing ADDITIONAL TRACTOR FRONT BALLAST MAY BE NEEDED FOR STABLE OPERATION AND TRANSPORT OF THE 3-POINT HITCH MOUNTED CUTTER. SEE TRACTOR OPERATOR’S MANUAL FOR RECOMMENDED WEIGHTS.
Figure 2-3 J. Using cut off section of shield as a guide, cut shaft the same amount. (Figure 2-6) Figure 2-6 H. Hold driveline sections parallel to each other and check for minimum 6 inches (15cm) overlap. Figure 2-4). 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. K. Repeat steps “I” and “J” to other driveline section. L.
SECTION III OPERATING INSTRUCTIONS 3-1 GENERAL SAFETY (285, 286, 287). Adjustment can be made with a ratchet or cylinder on the 287 dual wheel mount. (Figures 3-1 & 3-2) Only qualified people should operate this machine. Operator should wear hard hat, safety glasses and safety shoes. It is recommended that tractor be equipped with Rollover Protective Systems (ROPS) and a seat belt be used. Before beginning operation, clear work area of objects that may be picked up and thrown.
DANGER WARNING ROTATING CUTTER BLADES. STAND CLEAR UNTIL ALL MOTION HAS STOPPED. TO AVOID AN ACCIDENTAL FALL FROM THE TRACTOR AND POSSIBLE INJURY BY THE MOWER, IT IS RECOMMENDED THAT THE TRACTOR BE EQUIPPED WITH ROPS (ROLLOVER PROTECTIVE SYSTEM) AND THAT A SEAT BELT BE USED BY THE OPERATOR FOR ALL MOWING OPERATIONS. ALL ROTARY CUTTERS HAVE THE ABILITY TO DISCHARGE OBJECTS AT HIGH SPEEDS WHICH COULD RESULT IN SERIOUS INJURY TO BYSTANDERS OR PASSERS-BY.
5. PTO Driveline - Disconnect PTO driveline, pull the two sections apart, apply thin coat of multipurpose grease to inside of outer (female) sec tion. Reassemble sections and install. Pull each section to be sure driveline and shields are securely connected. Make certain PTO shielding is in good condition. 6. Gearbox - Add EP80W-90 gear oil as necessary to bring oil level to check plug on side of housing.
sary, do so in 1/3 turn increments. Adjust only to provide sufficient torque to prevent slippage under normal conditions. Occasional slippage is normal for drivetrain protection. If satisfactory results cannot be obtained, consult your Bush Hog dealer. turning blades. If clutch does not slip, contact your authorized Bush Hog dealer. C. Retighten nuts to within 1/64” of original position. Initial spring length is shown in Figure 4-3.
PRE-ASSEMBLY SAFETY PRECAUTIONS CAUTION THE FOLLOWING SAFETY PRECAUTIONS SHOULD BE THOROUGHLY UNDERSTOOD BEFORE ATTEMPTING MACHINE ASSEMBLY. 1. Wear personal protective equipment such as, but not limited to protection for eyes, ears, feet, hands, lungs and head when assembling the equipment. Do not wear loose clothing or jewelry that may catch on equipment moving parts. 2. Do not lift heavy parts or assemblies. Use crane, jack, tackle, fork trucks or other mechanical devices. 3.
SECTION V ASSEMBLY IMPORTANT Tighten all fasteners to specifications on Torque Chart unless otherwise indicated. H. Attach clutch shield to gearbox as shown in exploded drawing in Figure 5-6. I. Remove pivot bolt from spline end of clutch. Remove inspection cover from clutch shield. J. Slide clutch onto gearbox input shaft aligning bolt hole with slot in input shaft. Fasten with pivot bolt, lockwasher and nut. Torque to 30 ft./lbs. K.
5-2 3-POINT LIFT MODELS (287) I. Install lift pins and spacers according to Fig. 5-3. Fasten lift pin with klick pin. J. Attach clutch shield to gearbox as shown in exploded drawing in Figure 5-6. K. Remove pivot bolt from spline end of clutch. Remove inspection cover from clutch shield. L. Slide clutch onto gearbox input shaft aligning bolt hole with slot in input shaft. Fasten with pivot bolt, lockwasher and nut. Torque to 30 ft./lbs. M.
5-3 SEMI-MOUNT MODEL (287) D. Attach support yokes to the outside of the pivot arm using two 1” diameter x 11/16” long bushings, 3/4” x 2-1/2” capscrews, lockwashers and nuts. E. Attach the opposite ends of the support yokes over the welded strongback tubes which are located closest to the gearbox using 5/8” x 8” capscrews, flatwasher and locknut. F. For single tailwheel mounting position tailwheel bracket on rear of cutter deck as shown.
5-5 FRONT BELTING INSTALLATION Rear Band A. Align belting and clamp with holes in front lip of deck. B. Fasten with 3/8 x 3-1/2” capscrews, flatwashers, lockwashers and nuts. (Figure 5-4) Figure 5-4 5-6 REAR BAND INSTALLATION A. Align deflector band with holes in rear band of deck. B. Fasten with 3/8 x 1” capscrews, flatwashers, lockwashers and nuts. (Figure 5-4) 5-7 FRONT CHAIN INSTALLATION A. Align front chain assembly bracket with holes in front lip of deck. B.
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.
TORQUE SPECIFICATIONS Proper toque for American fasteners used on Bush Hog equipment. Recommended Torque in Foot Pounds (Newton Meters).* AMERICAN Bolt Head Markings SAE Grade 2 (No Dashes) SAE Grade 5 (3 Dashes) ” lt Bo ter “B e m Dia Wrench Size “A” SAE Grade 8 (6 Dashes) METRIC Wrench Size “A” WRENCH SIZE (IN.) “A” BOLT DIAMETER (IN.
MODEL 287 QUICK HITCH ASSEMBLY NOTE Pivot arm must be assembled as shown so that it will pivot upward as the hitch assembly flexes. Pointed end must be to the top.
BUSH HOG DIVISION OF P.O.
