Disassembly And Assembly Of Control Valve Assembly - Komatsu PC88MR-10 Shop Manual

50 Disassembly and assembly
Hydraulic system

Disassembly and assembly of control valve assembly

a Since the service valves are single add-on type, they can be added and removed one by one at any time.
Assembly
(PC88MR-C030-710-K-00-A)
This section explains only the precautions for assembling the 9-spool valve.
a Only figures for related items are shown.
a For figures not shown in this section, see "Control valve" OF "Facility standard" section in "Structure and
function".
Control valve top/bottom cover
a Tighten stud mounting nuts (01580-11008) (2) (4 pieces) of control valve top cover (1) in the order of
[1] to [4] in 3 times.
1st time:
19.6 to 29.4 Nm {2 to 3 kgm}
2nd time:
39.2 to 49.0 Nm {4 to 5 kgm}
3rd time:
58.8 to 73.5 Nm {6 to 7.5 kgm}
Be sure to loosen and tighten the following bolts while the spool is in the valve.
(3): 723-11-17361
(4): 723-11-27910
50-152
(PC88MR-C030-926-K-00-A)
PC88MR-10