Bush Hog CBH80 Operator's Manual Page 1

ASSEMBLYll OPERATION ll MAINTENANCE06/09 Rev. 2 $4.0050065802BUSH HOGBBaacckkhhooee MMooddeellssCBH60 / CBH70 / CBH80OOppeerraattoorr’’ss MMaannuu

IMPORTANT FEDERAL LAWS AND REGULATIONS* CONCERNINGEMPLOYERS, EMPLOYEES AND OPERATIONS.*(This section is intended to explain in broad terms the concept

GENERAL OPERATION!!CAUTIONTo avoid possible injury,observe the followingsafety rules BEFOREOPERATING the backhoe:1. BE SURE area is clearof un

SWING LEFT AND RAISE the boom by moving thecontrol lever back and to the left.SWING RIGHT AND LOWER the boom by movingthe lever forward and

It is not difficult to become an efficient operator.Control lever operating decal is located on back ofthe control console. Study this

!!CAUTIONTo avoid possible injury, observe the following safetyrules when transporting the backhoe:1. ALWAYS engage safety locks as shown on Figs. 1an

General OperationsFILLING THE BUCKETControl the bucket attitude throughout the digging cycle tokeep teeth at the proper angle for best penetra

General OperationsSIDE SLOPE EXCAVATING OR TRENCHINGDig with the backhoe uphill whenever possible.Level the backhoe on slopes with the stabiliz

!!CAUTIONTo avoid possible injury, observe the followingsafety rules WHEN SERVICING the backhoe:1. ENGAGE safety locks as shown in Figures 1 &am

TOOTH REPLACEMENTThe bucket tooth points are shelf-sharpening and willrequire little attention; however these points on thebucket shanks can

REMOVAL FROM TRACTOR - STORAGEThe backhoe is self-assisting during the installationand removal procedures. For removal and storage,follow

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 determi

STABILIZER PADSThe backhoe is supplied with flip-over stabilizer feet(Excluding Model CBH60) as standard equipment.They are suitable for mos

TROUBLESHOOTING (Continued)Problem Cause CorrectionMachine loses power after Diverter valve on prime move Diverter valve may need rebuilding oroperati

Troubleshooting (Continued)Problem Cause CorrectionLoss of power in any one Scored piston rods and worn Replace or rebuild the cylinder; replacecylind

Troubleshooting (Continued)Problem Cause CorrectionMaximum swing action Bent piston rod in cylinder Replace or rebuild the cylinder; replacecannot be

Troubleshooting (Continued)Problem Cause CorrectionLift, crowd or bucket Problems involving the control Dirt and shreds of packing material arecylinde

Troubleshooting (Continued)Problem Cause CorrectionLeaky valve Paint on valve spool; sticking (cont.)valve spool or scored valve spool Instead, the pl

Troubleshooting (Continued)Problem Cause CorrectionUnable to push valve Bent spool Replace with new spool section.spool in Foreign particles Clean sys

MODEL CBH 60 MONOBLOCKVALVE REPAIR - DISASSEMBLYReplacing Spools Seals:Note: For the purpose of these instructions we willconsider the control h

MODEL CBH 70, CBH 80 VALVE REPAIR - DISASSEMBLYReplace Center Section Assemblies:Note: For the purpose of these instructions we willconsider t

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 plater

Operator’s ManualBUSH HOG BACKHOE MODELSCBH60, CBH70, CBH80TABLE OF CONTENTSSECTION/PARA PAGEWarranty . . . . . . . . . . . . . . . . . . . . . . . .

ASSEMBLY - CBH 60, CBH 70, CBH 80The backhoe has been partially disassembled andstrapped to a skid for shipping purposes. Initialinstalla

MOUNTING KITS AND OPTIONAL KITS ASSEMBLY3-POINT HITCH LINKAGE FOR CBH 60 & CBH 70General DescriptionMounting and hydraulic kits do not include hos

Model CBH60 BackhoeATTACHING KIT INSTRUCTIONS3-POINT HITCH LINKAGE & HYDRAULIC HOOK-UP TO TRACTOR HYDRAULIC SYSTEMSGeneral DescriptionMounting an

Model CBH60 BackhoeATTACHING KIT INSTRUCTIONS3-POINT HITCH LINKAGE111416282726311927291675161411322514111622163020171810152115181720303412813923241662

MODEL CBH70 BACKHOEATTACHING KIT INSTRUCTIONS3-POINT HITCH LINKAGE & HYDRAULIC HOOK-UPTO TRACTOR HYDRAULIC SYSTEMS.General DescriptionMounting an

MODEL CBH70 BACKHOEATTACHING KIT INSTRUCTIONS3-POINT HITCH LINKAGE33Figure 15

MODEL CBH80 BACKHOEATTACHING KIT INSTRUCTIONS3-POINT HITCH LINKAGE & HYDRAULIC HOOK-UP TO TRACTOR HYDRAULIC SYSTEMSGeneral DescriptionMounting

MODEL CBH80 BACKHOEATTACHING KIT INSTRUCTIONS3-POINT HITCH LINKAGE35Figure 16

PTO PUMP & RESERVOIR KIT INSTALLATIONGeneral Description CBH704.5 GPM PumpThe PTO Pump Kit consists of those parts requiredto power the backhoe

IMPORTANT - When installing the backhoe, do not let the Swing Cylinders interfere with the backhoepump, or have the hydraulic lines become entangled i

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

General Description CBH 806.1 GPM PumpThe PTO Pump Kit consists of those parts requiredto power the backhoe from the tractor’s PTO shaft. Itincludes

IMPORTANT - When installing the backhoe, do not let the Swing Cylinders interfere with the backhoepump, or have the hydraulic lines become entangl

1. OPEN-CENTER SYSTEM WITH LOADER VALVEOR OTHER ACCESSORY VALVE CONNECTED TOTHE TRACTOR HYDRAULIC SYSTEMWhen a loader valve or other accessory valve m

Hydraulic Hook-Up (CBH 80) ForTractors With Closed-Center HydraulicSystems (Figure 21)There are two basic types of hydraulic systems,ope

POWER BEYOND KITSFOR TRACTORS WITH OPEN-CENTER HYDRAULIC SYSTEMSGeneral DescriptionA power beyond application is required to convert ahydraulic valve

BUSH HOG BACKHOE & BUSH HOG LOADER VALVEFigure 22NOTE: Large loader valve (Walvoil)shown. Small loader valve portingis different. Refer to

SECOND PROCEDUREASSEMBLY OF A BUSH HOG BACKHOETO A NON BUSH HOG LOADER VALVE -OR - BUSH HOG BACKHOE TO LOADERVALVE USING PTO PUMP KIT OPTION.IMPORTANT

Power Beyond – Model CBH60 - FIGURE 241. Remove the cover that encloses the backhoe valve within the control console.2. Disconnect Return Hose from

Power Beyond – Model CBH70 & CBH80 - FIGURE 251. Remove Plug from underside of Right Hand Valve End Cover.2. Install “Shut Off” Plug into the po

MECHANICAL THUMB INSTRUCTIONS - FIGURE 26Thumb OperationThe Mechanical Thumb is used for picking up objects and securing them between the thumb and th

DEALER PREPARATION CHECK LISTCBH60 - CBH70 - CBH80 BACKHOESBEFORE DELIVERING MACHINE - The following check list should be completed.Use the Operator’s

1459343276448111048FIGURE 26MECHANICAL THUMBASSEMBLED

REPOSITION STABILIZER CYLINDERS BEFOREREMOVING BACKHOE FROM SHIPPING PALLETCylinder ports must be pointing upward and hoses routed above the cylinder

BACKHOES - DIMENSIONS AND SPECIFICATIONSSpecifications May Vary Depending on Tractor Model and are Subject to Change Without Notification. Tractors Mu

BOLT DIAMETERWRENCH (IN.) “B” AND SAE SAE SAESIZE (IN.) “A” THREAD SIZE GRADE 2 GRADE 5 GRADE 87/16 1/4 - 2O UNC 6 (7) 8 (11) 12 (16)7/16 1/4 - 28 UNF

2501 Griffin Ave. llSelma, AL 36703 Telephone (334) 874-2700 llwww.bushhog.com

Safety Alert SymbolThis Safety Alert Symbol means: “ATTENTION! BECOME ALERT!YOUR SAFETY IS INVOLVED!”This symbol is used to call attention to

IMPORTANT SAFETY PRECAUTIONSThis symbol is used to call attention to safe-ty precautions that should be followed by the operator to avoid accidents. W

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 avo

SAFETY DECALSThe safety of the operator was a prime consideration in the design of the backhoe. Proper shielding, conve-nient controls, simple