Komatsu PC20R-8 Shop Manual page 248

REMOVAL AND INSTALLATION
ASSEMBLY OF THE WORK EQUIPMENT CYLINDERS
H Take great care not to damage the seal and the slid-
ing surfaces.
H Prepare each individual component before commen-
cing the final assembly.
1. Assembly of the cylinder head
1 - Position the guard ring (7) and, using a press and the
push rod C7, press it home in the head (3).
H Check the orientation carefully.
2 - Mount the snap ring (8).
3 - Using the tool C3, mount the lip-seal (9).
H Check that the lips face into the cylinder.
4 - Mount the O-ring (10), the anti-extrusion ring (11) and
the O-ring (12) onto the cylinder head (3).
H Only for the boom cylinders.
In sequence mount the anti-extrusion ring (17),
the O-ring (18) and the 2nd anti-extrusion ring
(17).
30-66
WORK EQUIPMENT CYLINDERS
7
3
8
10 3 11 12
8
7
9
7
C
3
RKPA1440
3
C
9
RKPA1450
17 18 17
RKZ05260
PC20R-8 PC27R-8