Bush Hog 765H manual

B USH H O G ® O per ator’ s M anual MODELS 665H / 765H / 865H / 965H ASSEMBL Y • OPERA TION • MAINTENANCE BA C K H O E S 801 $4.00 50034063[...]

CONGRA TULA TIONS! Y ou 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 wel[...]

BA CKHOES O perator ’ s Man ual T ABLE OF CONTENTS SECTION/P ARA P AGE W arranty ..................................................... 2 Dealer Preparation Check List ................... 3 Safety Procedures ...................................... 4 Safety Decals .............................................. 6 Federal Laws & Regulations.......[...]

BUSH HOG ® LIMITED W ARRANTY ✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯✯ 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-[...]

DEALER PREP ARA TION CHECK LIST 665H - 765H - 865H - 965H BACKHOES BEFORE DELIVERING MACHINE - The following check list should be completed. Use the Operator ’s Manual as a guide. ❑ Machine properly assembled. ❑ All safety decals readable (See decal page). ❑ All bolts tightened to torque specifications given in the torque chart. ❑ Machine[...]

IMPORT ANT SAFETY PRECAUTIONS This symbol is used to call attention to safe- ty precautions that should be followed by the operator to avoid accidents. When you see this symbol, carefully read the message that follows and heed its advice. Failure to comply with safety precautions could result in serious bodily injury. In addition to the design and [...]

12. DO NOT dig under stabilizers or tractor backhoe. Soft ground or sandy soil can cause cave-ins. 13. KEEP BUCKET away from the stabilizer area to avoid possible stabilizer damage. 14. ALWAYS swing bucket uphill to dump when on a hillside and keep loaded bucket low. 15. SET BRAKES and block wheels when operating on hills and banks to avoid dangero[...]

SAFETY DECALS The safety of the operator was a prime consideration in the design of the backhoe. Proper shielding, conve- nient controls, simple adjustments and other safety features have been built into this implement. The following decals are located on the backhoe. Keep decals clean and replace them immediately if they are missing. Contact your [...]

IMPORT ANT FEDERAL LA WS AND REGULA TIONS* CONCERNING EMPLOYERS, EMPLOYEES AND OPERA TIONS. *(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-St[...]

GENERAL OPERA TION CAUTION T o avoid the possible injury , observe the follow- ing safety rules BEFORE OPERA TING the backhoe: 1. BE SURE area is clear of underground utilities or other hazards. 2. POSITION barricade around work area. 3. PROVIDE adequate front end weight to counter-balance tractor at all times. 20% of the total tractor , loader and[...]

SWING RIGHT AND LOWER the boom by moving the lever forward and to the right. SWING RIGHT AND RAISE the boom by moving the lever back and to the right. 2. Left Hand Stabilizer: Push lever forward, the LH stabilizer lowers. Pull lever back, the LH stabilizer raises. 3. Right Hand Stabilizer: Push lever forward, the RH stabilizer lowers. Pull lever ba[...]

Smooth, light handling of the controls will result in the most efficient backhoe operation. Operate the backhoe control levers to become famil- iar with their speed and movements. The engine speed and the size of the hydraulic system will deter- mine the speed of cylinder operation. When powering from tractor systems with higher output than require[...]

CAUTION T o avoid possible injury , observe the following safety rules when transporting the backhoe: 1. AL W A YS engage safety locks as shown on Figs. 1 and 3 when transporting backhoe. 2. TRA VEL SLOWL Y over rough terrain, on hillsides, and around curves to prevent tipping. 3. DO NOT drive the tractor near the edge of a ditch or excavation. 4. [...]

General Operations FILLING THE BUCKET Control the bucket attitude throughout the digging cycle to keep teeth at the proper angle for best penetration. This will minimize dragging and scraping the bucket through the ground. When digging in hard-packed soil, bucket penetration can be increased by applying down pressure with the boom while crowding in[...]

General Operations SIDE SLOPE EXCA V A TING OR TRENCHING Dig with the backhoe uphill whenever possible. Level the backhoe on slopes with the stabilizers to dig plumb trenches, or use the backhoe or loader to cut a level slot for the uphill wheel and stabilizer . Pile the spoil from the slot on the low side. When on the side of a steep slope, cut a [...]

SER VICE CAUTION T o avoid possible injury , observe the following safety rules WHEN SERVICING the backhoe: 1. ENGAGE safety locks as shown in Figures 1 & 3 before servicing the backhoe. 2. DO NOT oil, grease or adjust the backhoe while it is in motion. 3. DO NOT change any backhoe relief valve settings. They are factory set for best performanc[...]

T ooth Replacement The bucket tooth points are self-sharpening and will require little attention; however , these points on the bucket shanks can be replaced when they become badly worn or broken. If a tooth shank breaks off, becomes damaged or lost so that it cannot hold a tooth point, a new shank should be welded to the bucket in its place. Weld-[...]

REMOV AL FROM TRACTOR - ST ORAGE The backhoe is self-assisting during the installation and removal procedures. For removal and storage, follow these steps: 1. Install the swing safety lock pin as shown in Figures 1 and 3. 2. Stretch out the boom, dipper arm and bucket as shown in Figure 9. Lower the bucket to the ground so that it rests there solid[...]

Stabilizer Pads - 765H, 865H and 965H The backhoe is supplied with flip-over stabilizer pads as standard equipment. They are suitable for most backhoe work and generally are all that is ever required. However , street pad kits are available as options for Models 765H, 865H and 965H backhoes. These kits bolt to the standard pads and increase the ver[...]

Causes and Corrections, Continued 12. Bent piston rod in cylinder - replace or rebuild the cylinder; replace damaged parts. 13. Worn or damaged rod seals on cylinder; external leaks - repack cylinder . Rebuild cylinder , replacing damaged parts as necessary . 14. Diverter valve on prime mover leaking externally or bypassing oil internally through v[...]

V AL VE REP AIR - DISASSEMBL Y RET AINER BACK-UP W ASHER SCREW 5/16-18 x 3/4 SPOOL COLLAR RETURN SPRING SPRING COLLAR LOCKW ASHER O-RING SEAL RETURN SPRING SPRING COLLAR SCREW , 5/16-18 x 3/4 SPOOL COLLAR LOCKW ASHER SCREW , 1/4-20 x 7/8 RETURN SPRING DETENT BALL FOLLOWER BONNET RET AINING RING STOP COLLAR DETENT BALL SCREW , 1/4-20 x 7/8 U-CUP SEA[...]

1. Remove control valve from the backhoe. 2. Thoroughly clean the exterior of the valve before beginning disassembly procedures. 3. At the BACK of the valve remove all bonnet assem- bly parts which are connected to the spool. Keep parts in the order of disassembly . See Figure 1 1 for the parts involved in the make-up of the bonnet assembly . IMPOR[...]

3. Remove plastic bag containing bucket pins from backhoe. Attach bucket (D) to dipperstick using one pin, two bolts, nuts, lockwashers, pin retainers and washers as necessary . 4. Attach bucket link (E) to bucket, using same hard- ware as listed for step #3. 5. Attach hoist to backhoe to prevent tipping. Remove all remaining strapping and attach s[...]

22 ASSEMBL Y (Refer to Figures 13 & 14) IMPORTANT: Tighten all hardware to the torque requirements specified in the torque chart. To prevent bodily injury, do not operate backhoe unless Lower Link Weldments (1, 2) are properly installed and adjusted. Failure to do so may result in backhoe being thrust upward, crushing operator against cab or RO[...]

Figure 14 (665H & 765H) 8 10 20 19 11 9 10 7 14 12 13 16 10 9 2 7 10 9 11 1 18 17 11 9 10 10 15 6 3 5 4 A TT ACHING KIT INSTRUCTIONS (For 865H) 3-POINT HITCH LINKAGE & HYDRAULIC HOOK-UP T O TRACTOR HYDRAULIC SYSTEMS General Description Mounting and hydraulic kits include two hoses which can be used in connecting the backhoe control valve to[...]

Figure 15 4 38 35 37 5 3 23 15 25 8 7 12 11 9 10 13 26 24 25 22 16 17 20 19 18 21 31 25 25 26 24 34 33 22 24 26 25 2 30 32 25 28 27 29 14 ASSEMBL Y IMPORTANT: Tighten all hardware to the torque requirements specified in the torque chart. To prevent bodily injury, do not operate backhoe unless Lower Link Weldments ( Figure 15 - 1, 2) are properly in[...]

10. Align RH and LH link weldment (12) with a hole in the upper bar/brace assembly, as close to the tractor as possible. Use 3/4 x 6” bolt (32), flat washer (25), lockwasher (24), and nut (26). See Figure 15. You may need to return to Step 6 and readjust upward or downward the bolt connection. 11. Remove backhoe from the tractor. 12. Install conn[...]

Tractor Reservoir Note: Do not connect hoses from the backhoe con- trol valve to the tractor hydraulic system until initial assembly of mounting kit is complete. 1. OPEN-CENTER SYSTEM WITH LOADER VALVE OR OTHER ACCESSORY VALVE CON - NECTED TO THE TRACTOR HYDRAULIC SYS - TEM: When a loader valve or other accessory valve must be connected to the trac[...]

Hydraulic Hook-Up (865H & 965H) For Tractors With Closed-Center Hydraulic Systems There are two basic types of hydraulic systems, open- center and closed-center. The open-center system con- stantly pumps oil through the hydraulic cylinder operat- ing valves and returns the oil to the reservoir. The closed-center system does not pump oil until t[...]

A TT ACHING KIT INSTRUCTIONS (For 965H) 3-POINT HITCH LINKAGE & HYDRAULIC HOOK-UP T O TRACTOR HYDRAULIC SYSTEMS General Description Mounting and hydraulic kits include two hoses which can be used in connecting the backhoe control valve to the tractor hydraulic system. Additional hydraulic components or kits will be required to complete the hook[...]

ASSEMBL Y (Refer to Figure 21 & 22) IMPORTANT: Tighten all hardware to the torque requirements specified in the torque chart. 1. Use hoist to raise the backhoe mainframe so that the boom pivot pin is approximately 16” off the ground. 2. Back tractor close to the backhoe. Connect tractor lower link arms to lower link mounts at position “C”[...]

Size Grade 2 Grade 5 Grade 8 1/4-20 NC 70 in. lbs. 1 15 in. lbs. 165 in. lbs. 1/4-28 NF 85 in. lbs. 140 in. lbs. 200 in. lbs. 5/16-18 NC 150 in. lbs. 250 in. lbs. 350 in. lbs. 5/16-24 NF 165 in. lbs. 270 in. lbs. 30 ft. lbs. 3/8-16 NC 260 in. lbs. 35 ft. lbs. 50 ft. lbs. 3/8-24 NF 300 in. lbs. 40 ft. lbs. 60 ft. lbs. 7/16-14 NC 35 ft. lbs. 55 ft. l[...]

ASSEMBL Y OF A BUSH HOG BACKHOE TO A BUSH HOG LOADER V AL VE IMPORTANT: Improper hydraulic hook-up can cause serious damage to backhoe control valve or other hydraulic components. Refer to the Bush Hog loader Operator’s Manual during this procedure. When connecting the Bush Hog backhoe valve to a Bush Hog front end loader valve, the input pressur[...]

BUSH HOG BACKHOE & BUSH HOG LOADER V AL VE FIGURE 23 NOTE: Large loader valve shown. Small loader valve porting is different. Refer to loader operator’s manual for different valves. IMPORTANT: Never connect the return hose to a tractor remote coupler which can be pressurised. Accidental pressurization can cause serious damage to backhoe valve[...]

ASSEMBL Y : BUSH HOG BACKHOE AND A NON BUSH HOG LOADER - OR - BUSH HOG BACKHOE AND LOADER USING PTO PUMP KIT OPTION IMPORTANT: Improper hydraulic hook-up can cause serious damage to backhoe control valve or other hydraulic components. The following instructions are to be used to connect the backhoe valve in line with a front end loader valve that i[...]

34 1 2 4 8 PRESSURE TO LOADER V AL VE LOADER VA LV E INLET OUTLET PRESSURE TO BACKHOE V AL VE TRACTOR PRESSURE “OUT” PORT OUTLET INLET RETURN FROM BACKHOE V AL VE TEE FITTING RETURN FROM LOADER V AL VE TRACTOR RESERVOIR PORT Figure 24 662H & 762H BACKHOES 862H & 962H BACKHOES 3 2 3 2[...]

PT O PUMP AND RESERVOIR KIT (Optional) General Description The PTO Pump Kit consists of those parts required to power the backhoe from the tractor ’s PT O shaft. It includes the PTO pump and adapter , reservoir , filtra- tion system, hydraulic hoses and fittings. In addition, it includes a pump plate which attaches to the tractor ’s draw bar an[...]

36 PUMP PLATE POSITIONS Pump Plate Pointing Down Pump Plate Pointing Up Figure 25 4.5 GPM PUMP KIT Figure 26 6.1 GPM PUMP KIT or 8 GPM PUMP KIT 14 20 15 1 27 9 2 24 10 25 13 7 4 9 2 23 5 21 24 FROM BACKHOE “RETURN” TO BACKHOE “PRESSURE” 6 12 3 16 19 18 22 11 17 FILTER ONLY 28 26 18 19 16 3 29 26 12 6 22 11 17 FILTER ONLY 5 21 24 4 7 12 25 1[...]

Specifications May Vary Depending on Tractor Model and are Subject to Change Without Notification. Tractors Must Be Equipped with ROPS and Seat belt That Will Provide Better Safety. SERIES 665H 765H 865H 965H Maximum Digging Depth 7’0” 8’0” 9’0” 10’1” A. Digging Depth (two foot flat bottom) 6’6” 7’6” 8’6” 9’7” B. Swi[...]

REPOSITION ST ABILIZER CYLINDERS BEFORE REMOVING BACKHOE FROM SHIPPING P ALLET Cylinder ports must be pointing upward and hoses routed above the cylinder to main- frame pivot pin connection. Models 865H (Shown) & 965H Models 665H and 765H 38[...]

NOTICE: INSTRUCTIONS FOR MOUNTING BUSH HOG BACKHOES ON SKID STEER LOADERS COME WITH THE INDIVIDUAL MOUNTING KITS. THE EXAMPLE SHOWN BELOW IS A MODEL 865H MOUNTED ON A JOHN DEERE MACHINE. 39[...]

BUSH HOG , L .L .C. ® P .O. Box 1039 ● Selma, AL 36702-1039 T elephone (334) 874-2700 ● www .bushhog.com[...]