Bush Hog CBH70 manual

ASSEMBLY l l OPERATION l l MAINTENANCE 06/09 Rev. 2 $4.00 50065802 BUSH HOG B B a a c c k k h h o o e e M M o o d d e e l l s s C B H 6 0 / C B H 7 0 / C B H 8 0 O O p p e e r r a a t t o o r r ’ ’ s s M M a a n n u u a a l l ®[...]

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[...]

O p e r a t o r ’ s M a n u a l B U S H H O G B A C K H O E M O D E L S C B H 6 0 , C B H 7 0 , C B H 8 0 T A B LE O F CO NT EN TS SECTION/PARA PAGE Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Dealer Preparation Check List . . . . . . . . . . . . . . 3 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . 5 Sa[...]

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 for non-commercial, state, and municipalities’ use and ninety (90) days for comme[...]

DEALER PREPARATION CHECK LIST CBH60 - CBH70 - CBH80 BACKHOES BEFORE DELIVERING MACHINE - The following check list should be completed. Use the Operator’s Manual as a guide. q Machine properly assembled. q All safety decals readable (See decal page). q All bolts tightened to torque specifications given in the torque chart. q Machine operates prope[...]

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 preca[...]

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. In addition to the design and c[...]

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 dec al s are locat ed o n the back hoe . Keep d ec als clean a nd r epl ac e them i mme di at ely if th ey a re m is[...]

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-Steige[...]

GENERAL OPERATION ! ! CAUTION To avoid possible injury, observe the follow ing safety rules BEFORE OPERATING the backhoe: 1. BE SURE area is clear of underground utilities or other hazards. 2. PO SITION barricade around work area. 3. PROVIDE adequate front end weight to counter-balance tractor at all times. 20% of the total tr a c t o r , l o a d e[...]

SWING LEFT AND RAISE the boom by movi ng the control lever back and to the left. 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. 3. Crowd/Bucket: Push lever forward, the dipper- stick moves ou t, a way from the operator. Pull le ver back, the dipp[...]

It is not difficult to become an efficient operator. Control lever operating decal is located on back of the control console. 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. Operate the backhoe control levers to become famil- iar[...]

! ! 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. DO NOT drive the tractor near the edge of a ditch or excavation. 4. USE[...]

General Operations FILLING THE BUCKET Control the bucket attitude throughout the digging cycle to keep t eeth 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 i[...]

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. When on the side of a steep slope, cut a leve[...]

! ! CAUTION To a vo id poss ib le inju ry , obs er ve the foll ow in g 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 perfor[...]

TOOTH REPLACEMENT The bucket tooth points are shelf-sharpening and will req uir e little a tte nti on; h owe ver t hes e points o n 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 po int, a new shank should be welded to the bucket in its pla[...]

REMOVAL FROM TRACTOR - STORAGE The backhoe is self-as sisting during the installat ion and remov al proced ure s. For removal a nd stora ge, follow these steps: 1. Install the swing safety lock pin as shown in Figures 1 and 3. 2. Stretch out the boom, dipper stick and bucket as shown in Figure 9. Lower the bucket to the ground so that it rests ther[...]

STABILIZER PADS The backhoe is supplied with flip-over stabilizer feet (Excluding Model CBH60) as standard equipment. They are suitable for most backhoe work and gener- ally are all that is ever required. However, foot pad kits are available as options. These kits bolt to the standard feet and increase the versatility of the back- hoe. See Figure 1[...]

TROUBLESHOOTING (Continued) Problem Cause Correction Machine loses power after Diverter valve on prime move Diverter valve may need rebuilding or operating satisfactorily leaking or bypassing oil internally replacing. initially through valve to reservoir Excessive back pressure Relieve condition. Restriction may be from outlet to reservoir. Relief [...]

Troubleshooting (Continued) Problem Cause Correction Loss of power in any one Scored piston rods and worn Replace or rebuild the cylinder; replace cylinder, including lift guides in cylinder damaged parts. and crowd (cont.) Bent piston rod in cylinder Replace or rebuild the cylinder; replace damaged parts. Worn or damaged rod seals on Repack cylind[...]

Troubleshooting (Continued) Problem Cause Correction Maximum swing action Bent piston rod in cylinder Replace or rebuild the cylinder; replace cannot be obtained damaged parts. Something jamming the swing Remove interference. linkage Slow operation of machine Low oil supply in reservoir Fill to proper level. (lack of power) all cylinders Oil viscos[...]

Troubleshooting (Continued) Problem Cause Correction Lift, crowd or bucket Problems involving the control Dirt and shreds of packing material are cylinders drop under load va lve (cont.) the usual causes of valve malfunction. when control spools Be sure the reservoir oil supply is kept shifted from neutral clean and only factory supplied packing pa[...]

Troubleshooting (Continued) Problem Cause Correction Leaky valve Paint on valve spool; sticking (cont.) valve spool or scored valve spool Instead, the plug and fitting should be removed from valve body and be reconnected, using a new O-ring. Do not apply excessive pressure on mounting bolts. The rods for CBH70, CBH80 should be torqued to 14 ft/lbs [...]

Troubleshooting (Continued) Problem Cause Correction Unable to push valve Bent spool Replace with new spool section. spool in Foreign particles Clean system and valve. Misalignment of control handle Check linkage for binding condition. linkage Spring centered spools Paint on valve spool; sticking Clean valve spool. Binding is usually do not return [...]

MODEL CBH 60 MONOBLOCK VALVE REPAIR - DISASSEMBLY Replacing Spools Seals: Note: For the purpose of these instructions we will consider the control handle side of the valve as the FRONT, and the opposite side as the BACK. 1. Remove control valve from the backhoe. 2. Throughly clean the exterior of the valve before beginning disassembly procedures. 3[...]

MODEL CBH 70, CBH 80 VALVE REPAIR - DISASSEMBLY Replace Center Section Assemblies: Note: For the purpose of these instructions we will consider the section containing the INLET PORT as the left side of the valve. NO TE : If it is deci d ed t h at a n o ve r ha ul of c o mp o- nents or pressure adjustments are necessary to cor- rect malfunctioning, [...]

8. At the FRONT of the valve remove all parts con- nected to the spool (handle, linkage, etc.). 9. At the FRONT of the valve remove seal plate retainer, back-up washer and spool O-ring seal. 10. Thoroughly clean counter bore. 11. Lightly oil new O-ring seal. Slide O-ring seal over valve spool and insert in seal counter bore. Replace back-up washer,[...]

ASSEMBLY - CBH 60, CBH 70, CBH 80 The backhoe has been partially disassembled and strapped to a skid for shipping purposes. Initial installation on the tractor will require a hoist or other device capable of safely lifting the entire backhoe fr o m th e s k i d . A f t e r t h e in i ti a l in s ta l l a t i o n i s co m- pl e t e, the ba ck h o e [...]

MOUNTING KITS AND OPTIONAL KITS ASSEMBLY 3-POINT HITCH LINKAGE FOR CBH 60 & CBH 70 General Description Mounting and hydraulic kits do not include hoses to connect the backhoe to the tractor hydraulic system. Additional hydraulic components, hoses, and/or kits will be required to complete the hook-up to the trac- tor hydraulic system. Refer to t[...]

Model CBH60 Backhoe ATTACHING KIT INSTRUCTIONS 3-POINT HITCH LINKAGE & HYDRAULIC HOOK- UP TO TRACTOR HYDRAULIC SYSTEMS General Description Mounting and hydraulics kits do not include hoses whi ch co nnect the back hoe cont rol valv e to the trac - tor hydraulic system. Additional hydraulic compo- nen ts, h oses , a nd / or ki ts w ill be r equi[...]

Model CBH60 Backhoe ATTACHING KIT INSTRUCTIONS 3-POINT HITCH LINKAGE 11 14 16 28 27 26 31 19 27 29 16 7 5 16 14 11 32 25 14 11 16 22 16 30 20 17 18 10 15 21 15 18 17 20 30 3 4 1 28 13 9 23 24 16 6 2 31 Figure 14[...]

MODEL CBH70 BACKHOE ATTACHING KIT INSTRUCTIONS 3- PO IN T HI TCH L IN KA GE & H YD RA ULI C HOO K- UP TO TRACTOR HYDRAULIC SYSTEMS. General Description Mounting and hydraulics kits do not include hoses which connect the backhoe control valve to the trac- tor hydraulic system. Additional hydraulic compo- nents, hoses and/or kits will be required[...]

MODEL CBH70 BACKHOE ATTACHING KIT INSTRUCTIONS 3- PO IN T HI TC H LI NK AG E 33 Figure 15[...]

MODEL CBH80 BACKHOE ATTACHING KIT INSTRUCTIONS 3-POINT HITCH LINKAGE & HYDRAULIC HOOK- UP TO TRACTOR HYDRAULIC SYSTEMS General Description Mounting and hydraulic kits do not include hoses which connect the backhoe control valve to the trac- tor hydraulic system. Additional hydraulic compo- nents, hoses and /or kits will be required to complete [...]

MODEL CBH80 BACKHOE ATTACHING KIT INSTRUCTIONS 3-POINT HITCH LINKAGE 35 Figure 16[...]

PTO PUMP & RESERVOIR KIT INSTALLATION General Description CBH70 4.5 GPM Pump 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 addi- tion, it includes a pump plate which attaches to the tra[...]

IMPORTANT - When installing the backhoe, do not let the Swing Cylinders interfere with the backhoe pump, or have the hydraulic lines become entangled in any part of the backhoe or tractor. Make sure both Pressure and Suction Lines are free from kinks or twists to reduce back pressure and excessive heat build-up. B AC KH O E M AI NF R A ME /A D A PT[...]

General Description CBH 80 6.1 GPM Pump 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 addi- tion, it includes a pump plate which attaches to the tractor’s drawbar and keeps the pump from [...]

IMPORTANT - When installing the backhoe, do not let the Swing Cylinders interfere with the backhoe pump, or have the hydraulic lines become entangled in any part of the backhoe or tractor. Make sure both Pressure and Suction Lines are free from kinks or twists to reduce back pressure and excessive heat build-up. 30 BACKHOE M AINFRAME/ADAPTER CBH 80[...]

1. OP EN -CE NTE R SY STE M WIT H LOA DE R VALV E OR OT HER ACC ESS ORY VAL VE CO NNEC TED TO TH E T RAC TOR H YDR AU LIC SY STE M When a loade r valve or other access ory valve must be connect ed to the trac tor hydr aulic system in addi- tion to the backhoe control valve, a Power Beyond Kit is required. This k it con verts the backho e valv e so [...]

H y d r a u l i c H o o k - U p ( C B H 8 0 ) F o r Tr a c t o r s Wi t h C l os e d - C e n t er H y d r a u li c Systems (Figure 21) There are two basic types of hydraulic systems, open-center and closed-center. The open-center syst em cons tan tly p ump s oil t hro ugh t he hydr aul ic cylinder operating valves and returns the oil to the reservo[...]

POWER BEYOND KITS FOR TRACTORS WITH OPEN-CENTER HYDRAULIC SYSTEMS General Description A power beyond application is required to convert a hydraulic valve so that pressurized oil can be direct- ed to a no the r “open c en ter ” valve . This allo ws the backhoe valve and a loader valve, or other accesso- ry, to be connected to the tractor hydraul[...]

BUSH HOG BACKHOE & BUSH HOG LOADER VALVE Figure 22 NOTE: Large loader valve (Walvoil) shown. Small loader valve porting is diffe ren t. Refer t o loade r o pe ra- tor’s manual for different valves. Inlet Bush Hog Loader Valve Outlet Op en Ce nte r Pl ug Power Beyond Plug (Supplied With Valve) IMPORTANT: Never connect the return hose to a t r [...]

SECOND PROCEDURE ASSEMBLY OF A BUSH HOG BACKHOE TO A NON BUSH HOG LOADER VALVE - OR - BUSH HOG BACKHOE TO LOADER VALVE USING PTO PUMP KIT OPTION. IMPORTANT: • Improper hydraulic hook-up can cause seri- ous damage to the backhoe control valve, loader valve, tractor valve, and other hydraulic components. • The pressure supply line from the PTO pu[...]

Power Beyond – Model CBH60 - FIGURE 24 1. Remove the cover that encloses the backhoe valve within the control console. 2. Disconnect Return Hose from 90 degree Adapter Union located on right hand side of control valve. 3. Remove 90 degree Adapter Union from control valve. 4. Install 1/4" BSPP Pipe Plug internally into the port opening. Tight[...]

Power Beyond – Model CBH70 & CBH80 - FIGURE 25 1. Remove Plug from underside of Right Hand Valve End Cover. 2. Install “Shut Off” Plug into the port opening. Torque Plug to 32 ft-lbs. 3. Remove Plug from Upper port on front side of Right Hand Valve End Cover. 4. Install 90 degree Adapter Union into Right Hand End Cover. 5. Assemble 45 deg[...]

MECHANICAL THUMB INSTRUCTIONS - FIGURE 26 Thumb Operation The Mechanical Thumb is used for picking up objects and securing them between the thumb and the bucket. Large objects which can include rocks and logs when grasped, will increase momentum of backhoe as it is swung side to side. Do not make sudden start and stops. Be careful lifting and movin[...]

1 4 5 9 3 4 3 2 7 6 4 4 8 11 10 48 FIGURE 26 MECHANICAL THUMB ASSEMBLED[...]

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. Backhoe is shipped palletized from factory. Remove stabilizers and fasteners from pallet. Position stabilizer between mounting lugs and pin into place. Cut plast[...]

BACKHOES - DIMENSIONS AND SPECIFICATIONS 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. CBH60 CBH70 CBH80 SERIES 6-1/4 Foot 7-1/4 Foot 8-1/4 Foot Maximum Digging Depth 76” 87.5” 99.5” A. Digging Depth (two foo[...]

BOLT DIAMETER WRENCH (IN.) “B” AND SAE SAE SAE SIZE (IN.) “A” THREAD SIZE GRADE 2 GRADE 5 GRADE 8 7 /16 1/4 - 2O UNC 6 (7) 8 (11) 12 (16) 7/16 1/4 - 28 UNF 6 (8) 10 (13) 14 (18) 1 /2 5/16 - 18 UNC 11 (15) 17 (23) 25 (33) 1 /2 5/16 - 24 UNF 13 (17) 19 (26) 27 (37) 9/16 3/8 - 16 UNC 20 (27) 31 (42) 44 (60) 9/16 3/8 - 24 UNF 23 (31) 35 (47) 49[...]

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2501 Griffin Ave. l l Selma, AL 36703 Telephone (334) 874-2700 l l www.bushhog.com[...]