Related Manuals for Bush Hog 665H
Summary of Contents for Bush Hog 665H
- Page 1 ® BUSH HOG BACKHOES Operator’s Manual MODELS 665H / 765H / 865H / 965H ASSEMBLY • OPERATION • MAINTENANCE $4.00 50034063...
- Page 2 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.
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Page 3: Table Of Contents
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 sub- mitted for warranty consideration must be made within forty-five (45) days of failure. -
Page 4: Warranty
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. -
Page 5: Dealer Preparation Check List
DEALER PREPARATION CHECK LIST 665H - 765H - 865H - 965H BACKHOES BEFORE DELIVERING MACHINE - The following check list should be completed. Machine properly assembled. All safety decals readable (See decal page). All bolts tightened to torque specifications given in the torque chart. -
Page 6: Safety Procedures
IMPORTANT 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. - Page 7 SAFETY PRECAUTIONS CONTINUED 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.
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Page 8: Safety Decals
The following decals are located on the backhoe. Keep decals clean and replace them immediately if they are missing. Contact your dealer or Bush Hog for replacements. Location: Right Side Of... -
Page 9: Federal Laws & Regulations
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. -
Page 10: General Operation
GENERAL OPERATION Figure 1 Stabilizer Cylinder DIRECTIONS: The terms right, left, front and back shall be determined from the position of the operator when seated in the operating position on the backhoe. ENGINE SPEED The speed at which the backhoe operates is partially dependent on engine RPM. -
Page 11: Operating The Backhoe
Figure 3 Safety Locks Swing Safety Lock 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. -
Page 12: Transporting The Backhoe
It is not difficult to become an efficient operator. Control lever operating decal is located on back of the control panel. Study this decal. It will assist you in becoming familiar with the controls. Smooth, light handling of the controls will result in the most efficient backhoe operation. -
Page 13: Placing The Stabilizers
CAUTION To avoid possible injury, observe the following safety rules when transporting the backhoe: 1. ALWAYS engage safety locks as shown on Figs. 1 and 3 when transporting backhoe. 2. TRAVEL SLOWLY over rough terrain, on hillsides, and around curves to prevent tipping. 3. -
Page 14: Filling The Bucket
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 and curling the bucket. -
Page 15: Backfilling
General Operations SIDE SLOPE EXCAVATING 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. -
Page 16: Service
CAUTION To 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. -
Page 17: Lubrication
(*) shown in Figures 6, 7, 8 & 8A, raise boom and install transport lock pin shown in Figure 1. On Models 665H, 765H, 865H and 965H the follow- ing locations should be oiled with SAE30 oil: A. Stabilizer Pivot Pins B. -
Page 18: Removal/Storage
REMOVAL FROM TRACTOR - STORAGE Figure 9 Blocking For Support 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. -
Page 19: Stabilizer Pads
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. - Page 20 - relief pressure will have to be checked and corrections made. Backhoe system pressure is 2100 psi for the 665H, 2100 psi for the 765H, 2400 psi for the 865H and 2250 psi for the 965H. Relief valve may need cleaning and overhauling, or entire cartridge must be replaced.
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Page 21: Valve Repair
VALVE REPAIR - DISASSEMBLY Figure 11 RETURN SPRING SPRING COLLAR SCREW, 5/16-18 x 3/4 SPOOL COLLAR LOCKWASHER SCREW, 1/4-20 x 7/8 RETURN SPRING DETENT BALL FOLLOWER BONNET RETAINING RING STOP COLLAR DETENT BALL SCREW, 1/4-20 x 7/8 Replace Center Section Assemblies: Note: For the purpose of these instructions we will consider the section containing the MAIN RELIEF VALVE as the left side of the valve. -
Page 22: Assembly
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 11 for the parts involved in the make-up of the bonnet assembly. -
Page 23: Attaching Kit Instructions
Dipperstick until it rests on the ground. Move control handle to “Boom Down” position as required to aid movement. ATTACHING KIT INSTRUCTIONS (For 665H & 765H) 3-POINT HITCH LINKAGE & HYDRAULIC HOOK-UP TO TRACTOR HYDRAULIC SYSTEMS General Description... - Page 24 ASSEMBLY (Refer to Figures 13 & 14) IMPORTANT: Tighten all hardware to the torque requirements specified in the torque chart. WARNING 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 ROPS.
- Page 25 Figure 14 (665H & 765H) ATTACHING KIT INSTRUCTIONS (For 865H) 3-POINT HITCH LINKAGE & HYDRAULIC HOOK-UP TO 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-up to the tractor hydraulic system.
- Page 26 Figure 15 ASSEMBLY IMPORTANT: Tighten all hardware to the torque requirements specified in the torque chart. WARNING To prevent bodily injury, do not operate backhoe unless Lower Link Weldments ( Figure 15 - 1, 2) are properly installed and adjusted. Failure to do so may result in backhoe being thrust upward, crushing operator against cab or ROPS.
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Page 27: Hydraulic Hook-Up
Figure 16 Backhoe Mainframe 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. - Page 28 Because a closed-center system requires no flow of oil through the backhoe control valve when the levers are in a neutral position, the 665H & 765H backhoes must not be connected to a closed- center tractor hydraulic system. A PTO pump kit is required if the tractor is to be mounted to a tractor with closed-center hydraulic system.
- Page 29 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 there is a demand for oil from one of the hydraulic cylinders.
- Page 30 Figure 21 (965H) ATTACHING KIT INSTRUCTIONS (For 965H) 3-POINT HITCH LINKAGE & HYDRAULIC HOOK-UP TO 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-up to the tractor hydraulic system.
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Page 31: Torque Chart
ASSEMBLY (Refer to Figure 21 & 22) IMPORTANT: Tighten all hardware to the torque requirements specified in the torque chart. WARNING TO PREVENT BODILY INJURY, DO NOT OPERATE BACKHOE UNLESS LOWER LINK WELDMENTS (217,218) ARE PROPER- LY INSTEALLED AND ADJUSTED. FAILURE TO DO SO MAY RESULT IN BACKHOE BEING THRUST UPWARD, CRUSHING OPERATOR AGAINST CAB OR ROPS. -
Page 32: Power Beyond Kits
Bush Hog backhoe and a competitive loader or a non Bush Hog valve. The second is also used to operate the backhoe and loader off the backhoe PTO pump kit option. The power beyond plug is included with the loader valve when the valve is ordered. - Page 33 There have been several different valves used on the loader in past years. The fittings required to con- vert the Bush Hog loader valve to a power beyond application are included in the loader valve kit. If the fittings (or plugs) cannot be located, they can be obtained from Bush Hog Service Parts.
- Page 34 BUSH HOG BACKHOE & BUSH HOG LOADER VALVE FIGURE 23 NOTE: Large loader valve shown. Small loader valve porting is different. Refer to loader operator’s manual for different valves. Outlet Inlet Bush Hog Loader Valve Open Center Plug Power Beyond...
- Page 35 The following instructions are to be used to connect the backhoe valve in line with a front end loader valve that is not a Bush Hog loader valve. When connecting the Bush Hog backhoe valve to a loader valve other than...
- Page 36 Figure 24 PRESSURE TO LOADER VALVE INLET LOADER VALVE OUTLET RETURN FROM LOADER VALVE 662H & 762H BACKHOES PRESSURE TO BACKHOE VALVE TRACTOR PRESSURE “OUT” PORT 862H & 962H BACKHOES OUTLET INLET RETURN FROM BACKHOE VALVE TEE FITTING TRACTOR RESERVOIR PORT...
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Page 37: Pto Pump & Reservoir
PTO PUMP AND RESERVOIR KIT General Description The PTO Pump Kit consists of those parts required to power the backhoe from the tractor’s PTO 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 and keeps the pump from turning with the PTO shaft. - Page 38 Figure 25 4.5 GPM PUMP KIT FILTER ONLY FROM BACKHOE “RETURN” TO BACKHOE “PRESSURE” Figure 26 6.1 GPM PUMP KIT 8 GPM PUMP KIT BACKHOE “RETURN” TO BACKHOE “PRESSURE” FILTER ONLY PUMP PLATE POSITIONS Pump Plate Pointing Down Pump Plate Pointing Up...
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Page 39: General Specifications
Dipperstick Cylinder Digging Force` Shipping Weight (less bucket) Hydraulic Volume Requirements Hydraulic Pressure Requirements Recommended Tractor HP Requirements Specifications May Vary Depending on Tractor Model and are Subject to Change Without Notification. Tractors Must Be Equipped 665H 7’0” 6’6” 180° 5’0” 8’6”... - Page 40 REPOSITION STABILIZER CYLINDERS BEFORE REMOVING BACKHOE FROM SHIPPING PALLET Cylinder ports must be pointing upward and hoses routed above the cylinder to main- frame pivot pin connection. Models 665H and 765H Models 865H (Shown) & 965H...
- Page 41 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.
- Page 42 ® BUSH HOG , L.L.C. P.O. Box 1039 Selma, AL 36702-1039 Telephone (334) 874-2700 www.bushhog.com...