Komatsu PC88MR-10 Shop Manual page 1131

2) Install thrust ball (108) to cylinder block
(104).
3) Install piston assemblies (piston (105) and
shoe (106)) (9 units) to retainer plate (107).
a After installation, soak the parts as a unit
in power line oil (TO30).
4) Install piston assembly (piston (105), shoe
(106), and retainer plate (107)) to cylinder
block (104) together.
a Install retainer plate (107) by both hands.
a Securely align retainer plate (107) with
the spherical portion of thrust ball (108)
(For details, see "Component parts
figure".)
PC88MR-10
50 Disassembly and assembly
5) Install cylinder block (104) to shaft (102).
a Align spline of shaft (102) to install
cylinder block (104).
6) After installation of cylinder block (104),
rotate cylinder block (104) by hand to check
that there is no play of the block around shaft
(102).
a Check it if any play is found.
a (For details, see "Component parts
figure".)
7. Assemble parking brake
1) Rotate travel motor assembly (1a) 90 deg. so
that the travel motor faces upward.
2) Install plate (116) to cylinder block (104).
3) Install disc (115) and plate (116) alternately
to cylinder block (104).
Power train system
50-103