Komatsu PC20R-8 Shop Manual page 249

REMOVAL AND INSTALLATION
2. Piston assembly
1 - Using the tool C8, mount the piston seal. Mount in se-
quence the rubber ring (13), the outer seal (14) and
the anti-extrusion rings (15).
2 - Mount the guide ring (16).
3 - Calibrate the diameter of the gasket (14) of the piston
(6), mounting the group beneath the press and using
the calibrating ring C9 adapted to fit the piston dia-
meter.
3. Piston rod group assembly
1 - Using a press and the tool C4 adapted to the dia-
meter, insert the bushing (17) into the piston rod (4).
2 - Insert the support «A» beneath the piston rod.
3 - Mount the pilot boss C10 adapted to the diameter
onto the extremity of the piston rod.
4 - Slide the head (3) onto the piston rod (4).
5 - Remove the pilot boss C10 from the extremity of the
piston rod.
PC20R-8 PC27R-8
WORK EQUIPMENT CYLINDERS
15 14 15 16
13
17
4
C
4
10
C
8
C
13 14 15
RKPA1460
6
9
C
RKPA1470
4
A
RKPA1480
4 3
RKPA1490
30-67