Removal And Installation Of Control Valve Assembly - Komatsu PC210-8 Shop Manual

UEN00663-02
Removal and installation of
control valve assembly
k
Release the remaining pressure in the
hydraulic circuit. For details, see Testing
and adjusting, release of remaining pres-
sure in hydraulic circuit.
Removal
a Attach an identification tag to each piping to
avoid a mistake in the position of installation
later.
1. Remove cover (1).
2. Drain hydraulic tank oil.
a Make the swing speed almost 0 degree for
below (3. – 6.) and to remove the control
valve mounting bolt.
6
Hydraulic tank:
a For the way not to drain the hydraulic tank
oil by using oil stopper, see Removal and
installation of hydraulic pump assembly.
3. Disconnect drain hose (2) through (8). Band:
(2): No color
q
(3): Red
q
(4): No color
q
(5): No color
q
(6): Red and yellow
q
(7): Brown
q
(8): No color
q
4. Disconnect connector (9) from clip. From the
top,
V06
V05
V04
V03
V02
V01
8
Approx. 234l (PC210, 230)
Approx. 239l (PC240)
50 Disassembly and assembly
5. Disconnect clamp (10).
6. Keep away solenoid assembly (11) from con-
trol valve bracket (B).
7. See Removal and installation of engine and oil
pressure pump assembly to remove below.
Engine hood
q
Control valve upper cover
q
Cover between hydraulic pump and en-
q
gine
Flame between control valve and engine
q
Cover between control valve and engine
q
8. Disconnect PLS1 port hose (12).
a Hose band: No color
9. Disconnect PLS2 port hose (13).
a Hose band: red
PC210, 230, 240-8