Komatsu PC88MR-10 Shop Manual page 1136

Hydraulic excavator
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50 Disassembly and assembly
Power train system
a When not using positioning jig [17] of
No.1 thrust washer (12), carefully tighten
bolt (40) to prevent No.1 thrust washer
(12) from drag turning with the bolt.
a After tightening bolt (40), remove
positioning jig [17].
12.Install No.2 planetary gear
1) Install No.1 thrust collar (9) to spindle (2).
2) Install No.2 thrust washers (11) (4 pieces) to
spindle (2).
a Adhesive (LT-2) is applied to screw hole
(g) on the shaft tip end of spindle (2). Set
tap (M8, P1.25) to the screw hole, and
blow compressed air to remove dust.
a Install No.2 thrust washer (11) with larger
chamfered side (h) facing downward.
50-108
3) Install inner bearings (30) (4 pieces), needle
bearing gauges (28) (4 pieces), No.2
planetary gears (7) (4 pieces).
a Install No.2 planetary gear (7) so that it
engages with the hub inner tooth.
4) Set jig [18] to the carrier, and install No.2
thrust washers (10) (4 pieces).
5) Tighten bolts (51) (4 pieces).
Bolt (51):
57.9 ± 9.81 Nm {5.9 ± 1.0 kgm}
a When not using positioning jig [18] of
No.2 thrust washer (10), carefully tighten
bolt (51) to prevent No.2 thrust washer
(10) from drag turning with the bolt.
a After tightening bolt (51), remove
positioning jig [18].
13.Install carrier assembly
1) Install carrier assembly (11a) assembled
above to hub (1).
a Install the planetary gear so that it
engages with the hub inner tooth.
PC88MR-10

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