Operator’s Manual Backhoe Series BH - Page 63 of 91 - Version 2.0
7.9 Replace Center Section Assemblies:
• For these instructions, we will consider the section containing the MAIN
RELIEF VALVE as the left side of the valve.
Method:
1. Remove the control valve from the Backhoe.
2. Thoroughly clean the exterior of the valve before beginning disassembly procedures. Mark
each section numerically so you can reassemble them in the same sequence.
3. Mount the valve vertically in a vice to facilitate disassembly and assembly.
4. Remove the three tie rod nuts from the right-end section using a thin-wall socket.
5. You can remove the valve sections by sliding the sections along the tie rods.
6. Thoroughly clean the O-ring counterbores and the ground surfaces of each section.
Place O-ring seals, ordered as a kit, in good counterbores.
For better sealing, it is recommended that all O-rings used in the counterbores are replaced
with new parts.
7. Replace sections on tie rods with the O-ring counter bores facing the right end of the valve.
Be careful replacing the sections so that the section O-rings are not moved from the
counterbores.
8. When all sections are assembled on the tie rods, tighten the tie rod nuts equally to 20 ft. lbs .
torque, NO MORE -NO LESS, or the spool may bind and stick.
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