Komatsu PC20R-8 Shop Manual page 216

REMOVAL AND INSTALLATION
REMOVAL OF THE CONTROL VALVE
Completely lower the working equipment until it is
resting on the ground and stop the engine.
Release all residual pressures from the circuits and
the tank. (For details, see «20. CONTROLS AND AD-
JUSTMENTS»).
H Drain out the hydraulic oil.
Hydraulic oil: approx. 29
1 - Remove control valve cover (1), lateral lower cover (2)
and inner control valve box cover. (For details, see
the single removal).
2 - Disconnect all the servo-control, function, delivery
and exhaust pipes (4) from control valve (3).
H Mark the tubes to avoid exchanging them during
re-assembly.
H Plug the tubes to prevent entry of impurities.
3 - Remove the floor mat (5) and the covers (6).
4 - Disconnect the lever command cable from the cables
(7).
5 - Disconnect the cables (8) and (9) from travel control
lever, from boom swing control pedal and from brack-
et.
30-34
,
1
2
3
4
5
8
9
CONTROL VALVE
RKPA2425
7
4
RKPA3050
6
RKPA3060
RKPA3070
PC20R-8 PC27R-8