Komatsu Galeo PC138US-8 Shop Manual page 887

50 Disassembly and assembly
Assembly
a When assembling, clean and inspect the parts
closely and take care fully so that dirt, rust,
flaw, etc. will not cause a trouble.
1. When installing piston (1), apply grease (G2-
LI) to its outside and the inside of the body
hole.
2. Install spring (2) with its small diameter side on
the shim (3) side.
Diameter of spring (Inside diameter)
q
Small diameter side: 4.9, Large diameter
side: 5.55
3. Use the insertion jig to insert bushing (4). (Do
not drive in the bushing with impact loads of a
hammer, etc.)
4. Use the insertion jig to insert pin (5). (Do not
drive in the pin with impact loads of a hammer,
etc.)
5. Apply grease (G2-LI) to the rocking part of
shaft (6) and the contact surfaces of lever (7)
and piston (1) and the contact surfaces of plate
(8) and pin of lever (9).
2
Quantity of grease (G2-LI)
Rocking part of shaft:
Contact surfaces of lever and piston:
Contact surfaces of plate and pin:
6. Install plate (8) with the cut part on the outside
of the PPC assembly.
7. Install washer (10) 1.6 mm thick first. If the dif-
ference between both sides at the stroke end
of the lever exceeds 0.7°, change the washer
thickness to reduce the difference to below
0.7°. (If the washer thickness is reduced by
0.3 mm, the stroke end angle is increased by
0.39°.)
Thickness of washer t: 1.0, 1.3, 1.6
q
8. Tighten each part to the following torque.
Plug (11): 6 – 11 Nm {0.6 – 1.1 kgm}
q
Bolt (12): 3.9 – 4.9 Nm {0.4 – 0.5 kgm}
q
(Apply LOCTITE #262.)
Screw (13): 7.8 – 9.8 Nm {0.8 – 1.0 kgm}
q
Plug (14): 4 – 9 Nm {0.4 – 0.9 kgm}
q
Bolt (15): 25 – 30 Nm {2.5 – 3.2 kgm}
q
Bolt (16): 27 – 34 Nm {2.8 – 3.5 kgm}
q
PC138US, USLC-8
4 – 8 cc/periphery
0.3 – 0.8 cc/place
0.3 – 0.8 cc/place
SEN02713-00
31