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6)
INSTRUCTION FOR DISASSEMBLY AND REASSEMBLY
Before disassembly, visually inspect for leakage of oil and for part that have damage and clean the
valve up. Preparation for assembly put the tag on each part to prevent wrong assembly and clean
the parts completely. Inspect the parts if there is any scratch or dent, and check the movement. In
assembly process, follow the tightening torque specification.
(1)
Operation
Warm-up is very important before operation.
Be careful operating control valve when oil and valve temperature is low, to avoid stick by spool
heat shock.
Not doing continual operates of main relief valve and port relief valve, warm valve uniformly by
circulating oil to each cylinder.
Not doing neither inching operating nor multiple operation in low temperature to avoid heating
locus of control.
(2)
Relief valve
Exchanging complete relief valve is recommended. Therefore do not disassemble if there is any
defect in the relief valve.
(3)
Mounting
Be careful not to affect extreme force to control valve by hydraulic hose.
Tighten up all mounting blots in same torque.
It is possible that seals are damaged by heat weld slag in which case of welding near the control
valve.
To prevent contamination entering control valve, do not take off the shipping plug until install
hydraulic hose.
6-46
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