Komatsu Galeo PC138US-8 Shop Manual page 875

50 Disassembly and assembly
a In this section, only the precautions for assem-
bling the control valve assembly are described.
Before assembling the parts, apply engine oil
q
to their sliding surfaces.
2
Mating face:
Liquid sealant (Sealend 242 or equivalent)
a The tightening torque of the parts and the pre-
cautions are shown below (in random order).
Install cover (1):
q
Tighten the 4 nuts (17) in the diagonal order
([1] – [4]) according to the following procedure.
1st time:
3
58.8 – 68.6 Nm {6 – 7 kgm}
2nd time:
3
78.5 – 88.3 Nm {8 – 9 kgm}
3rd time:
3
98.1 – 113 Nm {10 – 11.5 kgm}
a The height of the stud top above the nut top:
Assembling block (10):
q
Tighten the 4 bolts (18) in the diagonal order
([1] – [4]) according to the following procedure.
1st time:
3
19.6 – 29.4 Nm {2 – 3 kgm}
2nd time:
3
39.2 – 49.0 Nm {4 – 5 kgm}
3rd time:
3
58.8 – 73.5 Nm {6 – 7.5 kgm}
a Degrease and dry up the threads of the plugs
and female screws in advance. Do not apply
pressure for 2 hours after tightening them.
PC138US, USLC-8
0.5 – 3 mm
SEN02713-00
19