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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. At the BACK of the valve remove all bonnet

assembly parts which are connected to the spool.

Keep parts in the order of disassembly. See each

valve section parts breakdown for the parts involved

in the make-up of the bennet assembly.

IMPORTANT: DO NOT remove the spool from

the valve. The seals can be replaced externally.

Prevent spools from turning or moving by

inserting a screw drive through the clevis slot,

or by running a rod through the pin hole and

using the rod as a handle.

DO NOT hold the spool with a wrench. This will

destroy the finish.

4. At the BACK of the valve, remove seal retainer,

back-up washer, and spool O-ring seal, or retaining

sleeve, bonnet O-ring seal and spool O-ring.

5. Throughly clean counter bores.

6. Install new seals:

A. Spring-Centered Bonnet Assembly Only:

Lightly oil new O-ring seal. Slide seal over valve

spool and insert weal in counter bore. Replace back-

up washer and seal retainer.

B. Float Bonnet Assembly Only:

Lightly oil new O-rings. Install O-rings into spacer.

Slide spacer with O-rings over valve spool being

careful to orient as shown in boom valve section

breakdown.

7. At the BACK of the valve replace bonnet assem-

bly parts, reversing the order in which they were dis-

assembled in step 3. Use 6 - 8 ft. lbs. Torque to

tighten assembly screw on spring centered bonnet

assembly.

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. Throughly 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 and seal plate retainer.

12. Reattach all parts connected to the spool (han-

dle, linkage, etc.)

FRONT

MODEL CBH 60

MONOBLOCK VALVE

Bonnet

Assembly

Seal Plate

Back Up Washer

“O”- Ring

Float

Bonnet

Assembly

Figure 11

All manuals and user guides at all-guides.com

Содержание CBH60

Страница 1: ...l MAINTENANCE 06 09 Rev 2 4 00 50065802 BUSH HOG B Ba ac ck kh ho oe e M Mo od de el ls s CBH60 CBH70 CBH80 O Op pe er ra at to or r s s M Ma an nu ua al l All manuals and user guides at all guides co...

Страница 2: ...the same precision and skill as our original equipment Our trained service personnel are well informed on methods required to service Bush Hog equipment and are ready and able to help you Should you...

Страница 3: ...and to have any part s repaired or replaced when continued operation would cause damage or excessive wear to other parts or cause a safety hazard It is the Retail Customer s responsibility to deliver...

Страница 4: ...arges for normal service or adjustment loss of crops or any other loss of income rental of substitute equipment expenses due to loss damage detention or delay in the delivery of equipment or parts res...

Страница 5: ...e operates properly q Operator s manual has been delivered to owner and he has been instructed on the safe and proper use of the backhoe Dealer s Signature CAUTION It is recommended that the tractor b...

Страница 6: ...rds are intended to alert the viewer to the existence and the degree of hazard seriousness This signal word indicates a potentially hazardous situation which if not avoided will result in death or ser...

Страница 7: ...7 Stop tractor engine place transmission in park or neutral engage parking brake lower loader arms to ground cycle all hydraulic controls to relieve pressure allow machine moving parts to stop remove...

Страница 8: ...t regulations 4 BE SURE the SMV emblem is visible to the rear ADJUSTMENTS AND INSPECTION 1 CHECK pins that attach backhoe to tractor and all pivot pins for tightness several times daily Replace any pa...

Страница 9: ...imple 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 Conta...

Страница 10: ...uctions to Keep all guards in place when the machine is in operation Permit no riders on equipment Stop engine disconnect the power source and wait for all machine movement to stop before servicing ad...

Страница 11: ...ated on the control console directly ahead of the operator See Figure 2 The following is a list of the controls with the function of each reading from left to right 1 Left Hand Stabilizer Push lever f...

Страница 12: ...the RH stabilizer lowers Pull lever back the RH stabiliz er raises OPERATING THE BACKHOE To avoid possible injury observe the following safety rules WHEN OPERATING the backhoe 1 DISENGAGE safety lock...

Страница 13: ...of the swing arc so material can be dumped on either side As the operator becomes more familiar with the oper ation of the backhoe it will be common practice to operate two controls at one time For ex...

Страница 14: ...sport height It is normal for the backhoe to slowly settle while being transported PLACING THE STABILIZERS Decreased Digging Depth Narrower Stabilizer Platform Stabilizers Improperly Positioned INCORR...

Страница 15: ...wing ing it to the spoil pile As the pile is approached dump the bucket When the bucket is empty the dipperstick and bucket are in position to resume digging upon return to the trench IMPORTANT Avoid...

Страница 16: ...sandy soil use a platform under the rear tires and the stabilizers The plat form distributes the load over a larger area and lessens the possibility of a cave in The platform also tends to keep the u...

Страница 17: ...system for leaks by examining the oil in the reservoir If air is being drawn into the system the oil will contain air bubbles and appear to foam When tightening connections always use two wrenches IMP...

Страница 18: ...grease If any grease fittings are missing replace them immediately Clean all fittings thoroughly before using grease gun Lubricate all grease fittings at least twice daily once at the beginning of op...

Страница 19: ...m can now be disconnected CAUTION Make sure tractor PTO is disengaged and engine shut off before disconnecting pump or hydraulic lines a On PTO pump self contained systems the pump should be removed f...

Страница 20: ...n immediately or gangrene may result TROUBLESHOOTING PROCEDURES Problem Cause Correction Machine fails to operate when started initially Low oil supply in reservoir Fill to proper level No oil supply...

Страница 21: ...l This valve is a precision device and is valve not intended for any extensive field adjustment or repair Field replace ment parts are limited to seal kits cartridges valve sections and tie rods Repla...

Страница 22: ...rs functioning leaking O ring fittings Check and properly replace any damaged hoses and lines Restrictions in oil lines Check and replace any damaged hoses and lines Check for pinched hoses Oil is byp...

Страница 23: ...80 Relief valve may need cleaning and overhauling or entire cartridge must be replaced Spongy or jerking action Low oil supply in reservoir Fill to proper level of cylinders and or noisy operation Air...

Страница 24: ...ontrol valve Damaged or worn spool seals Replace spool end seals Leaky cylinders Oil is bypassing cylinder piston Replace or rebuild the cylinder replace scored piston worn piston damaged parts packin...

Страница 25: ...lbs for 5 16 nuts and 33 ft lbs for 3 8 nuts Never force spool Bent spool Replace with new spool section Foreign particles Clean system and valve Misalignment of control handle Check linkage for bind...

Страница 26: ...ected 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 for 5 16 nuts and 33 ft lbs for 3 8 nuts Never force spool Oil leakag...

Страница 27: ...pool O ring 5 Throughly clean counter bores 6 Install new seals A Spring Centered Bonnet Assembly Only Lightly oil new O ring seal Slide seal over valve spool and insert weal in counter bore Replace b...

Страница 28: ...s 11 Position valve assembly with the mounting pads of the end sections on a flat surface To obtain prop er alignment of end sections relative to the spool sec tions apply downward pressure to the end...

Страница 29: ...ter 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 and seal plate retainer 12 Reattach all parts connected to the spool h...

Страница 30: ...hoe Attach bucket to dipperstick using one pivot pin two 5 16 NF x 7 8 bolts lock nuts pin retainers and washers as needed to take up gap under pin retainers Place shims between dipper stick and bucke...

Страница 31: ...me kit instructions differ with each tractor backhoe combination and come included with the individual subframe kit 4 To an agricultural tractor using a 4 point kit specif ically offered for the tract...

Страница 32: ...base backhoe consisting of four 1 2NC x 1 3 4 Carriage Bolts Lockwashers and Nuts 5 Tighten and torque all hardware installed 6 Back tractor close to the backhoe Connect tractor lower link arms to lo...

Страница 33: ...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 All manuals and u...

Страница 34: ...ect tractor lower link arms to lower link mounts using two L pins 14 two Cotter Pins 11 and two Wire Form Cotter Pins 12 NOTE If tractor has a Category II hitch install two Bushings 15 in lower link a...

Страница 35: ...MODEL CBH70 BACKHOE ATTACHING KIT INSTRUCTIONS 3 POINT HITCH LINKAGE 33 Figure 15 All manuals and user guides at all guides com...

Страница 36: ...link arms to lower link mounts using two L pins 14 two Cotter Pins 11 and two Wire Form Cotter Pins 12 NOTE If tractor has a category II hitch install two Bushings 15 in lower link arms 3 Attach Upper...

Страница 37: ...MODEL CBH80 BACKHOE ATTACHING KIT INSTRUCTIONS 3 POINT HITCH LINKAGE 35 Figure 16 All manuals and user guides at all guides com...

Страница 38: ...the Filter Base 8 Assemble Pump Plate 26 to Pump 11 using two 3 8 NF x 1 3 4 Bolts 1 Lockwashers 8 and Nuts 4 Pump Plate may have to be readjusted later when installed on tractor PTO Shaft The Plate...

Страница 39: ...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 BACKH...

Страница 40: ...d Nuts 4 Pump Plate may have to be readjusted later when installed on tractor PTO Shaft The Plate may need to be turned 180 degrees to provide prop er engagement with tractor drawbar and have ade quat...

Страница 41: ...es 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 MAINFRA...

Страница 42: ...the reservoir as shown in Figure 19 IMPORTANT Never connect the return hose to a tractor remote coupler which can be pressur ized Accidental pressurization can cause seri ous damage to backhoe valve 4...

Страница 43: ...oe control valve to make it a non circulating or a demand type sys tem 4 A low pressure surge valve in the return line to keep the tractor back pressure surges from dam aging the backhoe control valve...

Страница 44: ...khoe FIRST PROCEDURE ASSEMBLY OF A BUSH HOG BACKHOE TO A BUSH HOG LOADER VALVE IMPORTANT Improper hydraulic hook up can cause serious damage to backhoe control valve or other hydraulic components Refe...

Страница 45: ...plied With Valve IMPORTANT Never connect the return hose to a tractor remote coupler which can be pressurized Accidental pressurization can cause serious damage to backhoe valve Backhoe Connection Loc...

Страница 46: ...at is not a Bush Hog loader valve When connecting the Bush Hog backhoe valve to a valve other than one obtained from Bush Hog the input pressure line from the tractor will be connected to the pressure...

Страница 47: ...inal pressure hose to the loader or other accessory valve 9 Connect the other end of the hydraulic hose to the pressure port of the loader or accessory valve using fit tings supplied by customer as re...

Страница 48: ...e 9 Connect the other end of the hydraulic hose to the pressure port of the loader or accessory valve using fit tings supplied by customer as required Refer to Figure 25 10 Complete assembly of the ba...

Страница 49: ...to backhoe components 1 Park tractor with loader and backhoe on a level surface 2 Set Parking Brake Exit tractor 3 Remove Boom Lock Pin from backhoe and place in storage location Enter backhoe 4 Lower...

Страница 50: ...1 4 5 9 3 4 3 2 7 6 4 4 8 11 10 48 FIGURE 26 MECHANICAL THUMB ASSEMBLED All manuals and user guides at all guides com...

Страница 51: ...rom factory Remove stabilizers and fasteners from pallet Position stabilizer between mounting lugs and pin into place Cut plastic ties from rod ends of hydraulic cylinders swing down and pull rod end...

Страница 52: ...t 104 120 136 E Transport Height maximum 66 82 90 F Bucket Rotation 180 180 180 G Loading Reach bucket at 60 33 40 41 H Transport Overhang 37 48 5 54 5 I Undercut 17 14 17 5 J Stabilizer Spread up pos...

Страница 53: ...2013 2728 2 1 16 1 3 8 6 UNC 655 887 1470 1992 2382 3228 2 1 16 1 3 8 12 UNF 746 1011 1672 2266 2712 3675 2 1 4 1 1 2 6 UNC 870 1179 1950 2642 3161 4283 2 1 4 1 1 2 12 UNF 979 1327 2194 2973 3557 482...

Страница 54: ...All manuals and user guides at all guides com...

Страница 55: ...All manuals and user guides at all guides com...

Страница 56: ...2501 Griffin Ave l l Selma AL 36703 Telephone 334 874 2700 l l www bushhog com All manuals and user guides at all guides com a l l g u i d e s c o m...

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