Komatsu PC200-8M0, Shop Manual

Page: 1083 / 1254

SEN06146-00
PC200, 200LC, 220, 220LC-8M0 50-500
9
500 Hydraulic system
Removal and installation of control valve assembly
Removal and installation of
control valve assembly
1
Removal
k Park the machine on a level surface, lower
the work equipment to the ground so that it
is stable, and stop the engine.
k Disconnect the cable from the negative (–)
terminal of the battery.
k Release the remaining pressure in the
hydraulic circuit. For details, see Testing
and adjusting, "Releasing residual pres-
sure from hydraulic circuit".
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 angle almost 0
°
for below
(3. – 6.) and to remove the control valve
mounting bolt.
6 Hydraulic tank:
237
l
(PC200/200LC-8M0)
244
l
(PC220/220LC-8M0)
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 hoses (2) through (8).
(Band color)
q
(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
4. Disconnect connector (9) from clip.
(From the top)
V06
V05
V04
V03
V02
V01
5. Disconnect clamp (10).
6. Keep away solenoid assembly (11) from con-
trol valve bracket (B).
7. See "Removal and installation of engine and
hydraulic pump assembly" to remove below.
q Engine hood
q Control valve upper cover
q Cover between hydraulic pump and en-
gine
q Frame between control valve and engine
q Cover between control valve and engine
8. Disconnect PLS1 port hose (12).
a
Hose band: No color
9. Disconnect PLS2 port hose (13).
a
Hose band: red