Komatsu Utility PC12R-8 MISTRAL, Shop Manual, Page: 261 / 324

DISASSEMBLY AND ASSEMBLY OF THE SPRING RECOIL AND
THRUST CYLINDER GROUPS
1 - Spring recoil group
H First inject grease to remove the piston.
Disassembly
1 - Place the group (1) beneath a press on which the tool
B1 is mounted.
The spring is mounted with a strong pre-loading. Ma-
ke sure that the group is well-centred and that it is
standing perfectly flat.
2 - Increase pressure slowly and compress the spring
(2).
3 - Maintaining pressure, remove the cotter pin (3) and
the nut (4).
4 - Slowly release pressure until the spring is completely
released.
H Length of released spring: 200 mm
5 - In sequence remove the cylinder (5), the spring (2),
the spacer (6) and the support (7).
Assembly
.
To re-assemble, reverse the dismantling procedure.
H Tighten the nut (4) up to the indicated length of the
spring. (See «40. STANDARD MAINTENANCE»).
Mount the cotter pin (3).
H After assembly, check that the parallelism error bet-
ween the faces A and B is less than 0.5 mm.
2 - Thrust cylinder
Disassembly
1 - Take the piston rod (8) out of the cylinder.
2 - Take out the guard ring (9), the anti-extrusion ring
(10), and the O-ring (11).
Assembly
.
To re-assemble, reverse the dismantling procedure.
30-61
REMOVAL AND INSTALLATION SPRING RECOIL AND THRUST CYLINDER GROUPS
PC12R-8 PC15R-8
F
RKP05150
B1
1
2
RKP05200
2
3
4
5
6
7
A
B
=
=
RKP05160
RKP05210
8
9
10
11
11 10 9