Komatsu PC88MR-10 Shop Manual page 1127

1) Set hub (1) on cylinder [7a] on the press
table.
2) Install ball bearing (24) to hub (1) and press-
fit the bearing by using push tool [6].
3) Rotate hub (1) reversely and install ball
bearing (24) to the opposite side similarly.
a Check the direction of ball bearing (24),
and then install it.
4) Apply grease (G2-LI) to the O-ring of floating
seal (31), and install it to hub (1).
a Remove the O-ring and thinly apply
grease to the periphery.
5) Set No.1 installation jig [14] and then No.2
installation jig [15] to hub (1) in this order,
and push No.2 installation jig [15] until it
contacts to No.1 installation jig [14].
a Remove No.1 installation jig [14] and
No.2 installation jig [15].
a Check that the parallelism of the end
surface of hub (1) and the seal surface of
floating seal (31) is 1 mm or less.
6) Install eyebolts [10] (2 pieces) to the
mounting bolt hole of hub (1).
a Install eyebolts [10] (2 pieces)
symmetrically.
7) Sling hub (1) and set it to work stand [1].
Hub (1): 25 kg
PC88MR-10
50 Disassembly and assembly
8) Install hexagonal socket head bolts [1a] (2
pieces) symmetrically.
Tighten hexagonal socket head bolts
[1a] (2 pieces). (To protect the travel
motor assembly from falling off the
work stand when inverting it.
2. Assemble spindle
1) Apply grease (G2-LI) to the O-ring of floating
seal (31), and install it to spindle (2).
a Remove the O-ring and thinly apply
grease to the periphery.
2) Set No.3 installation jig [16] and then No.2
installation jig [15] to spindle (2) in this order,
and push No.2 installation jig [15] until it hits
No.3 installation jig [16].
a Remove No.3 installation jig [16] and
No.2 installation jig [15].
a Check that the parallelism of the end
surface of spindle (2) and the seal
surface of floating seal (31) is 1 mm or
less.
Power train system
50-99