Komatsu F30791, Shop Manual

Page: 219 / 298

REMOVAL OF RIGHT-HAND PPC VALVE (BOOM-BUCKET)
Lower the working equipment untilit is resting on the
ground, stop the engine and remove the ignition key.
Release all residual pressures from all circuits and
from the tank. (For details, see «20. CONTROLS
AND ADJUSTMENTS»).
1 - Take off the arm-rest (1).
2 - Disconnect cap (2).
H Take great care not to damage the frame (3).
3 - Take out the screws (4) e overturn the cover toward
engine hood.
4 - Disconnect the horn connector (5).
5 - Take out the screws (6) and remove the PPC valve
(7).
6 - Disconnect the six PPC valve tubes (7) and plug them
to prevent entry of impurities.
H Check that the tubes are marked to avoid exchan-
ging them during re-assembly.
INSTALLATION OF RIGHT-HAND
PPC VALVE (BOOM-BUCKET)
. To install, reverse the removal procedure.
H Check carefully the positions for re-connecting
the tubes.
Position
P T P1 P2 P3 P4
White
M
White
S
Red
D
Red
S
Yellow
C
Yellow
A
If the couplings are removed from the PPC valves,
make sure that the coupling with a filter is mounted
on input P .
30-37
REMOVAL AND INSTALLATION RIGHT-HAND PPC VALVE (BOOM-BUCKET)
PC20R-8 PC27R-8
RKPA3133
4
1
3
2
RKPA3140
5
7
6
RKPA3150
8
7
RKPA3160
P
P
3
P
1
P
4
P
2
T