Disassembly And Assembly Of Control Valve - Komatsu PC200-8M0 Shop Manual

SEN06146-00
Disassembly and assembly of
control valve
a This section explains only the precautions for
assembling the contol valve assembly.
Special tools
Part number
Guide f21.8 mm
796-946-1310
(For 723-46-40100)
Guide f21.4 mm
796-946-1610
(For 723-46-41100)
Guide f21.2 mm
796-946-1810
2
(For 723-46-43100 and 723-46-43400)
Guide f21.0 mm
796-946-1910
(For 723-46-46101 and 723-46-46300)
Guide f20.6 mm
796-946-2210
(For 723-46-45100 and 723-46-45700)
Guide f21.8 mm
796-946-1320
(For 723-46-40100)
Guide f21.4 mm
796-946-1620
(For 723-46-41100)
Guide f21.2 mm
796-946-1820
(For 723-46-43100 and 723-46-43400)
3
Guide f21.0 mm
796-946-1920
T
(For 723-46-46101 and 723-46-46300)
Guide f20.6 mm
796-946-2220
(For 723-46-45100)
Guide f21.6 mm
796-946-1420
(For 723-46-42700)
796-946-1330 Sleeve
(For 723-46-40100)
796-946-1630 Sleeve
(For 723-46-41100)
796-946-1830 Sleeve
(For 723-46-43100 and 723-46-43400)
4
796-946-1930 Sleeve
(For 723-46-46101 and 723-46-46300)
796-946-2230 Sleeve
(For 723-46-45100)
796-946-1430 Sleeve
(For 723-46-42700)
14
50-500
1
Part name
t 1
t 1
t 1
t 1
t 1
t 1
t 1
t 1
t 1
t 1
t 1
t 1
t 1
t 1
t 1
t 1
t 1

Disassembly and assembly of control valve

Procedures for replacing pressure com-
pensation valve seal
a Since many types of pressure compensation
valves are installed, put a mark on each and
record the installed position when removing
them.
1. Remove piston (2), plug (3) and spring (4) from
pressure compensation valve (1).
2. Remove seals (5) and (6) from piston (2).
a There are many types of pistons.
3. Place tool T2 on piston (2), put seal (5) on the
tool, and then push the seal down slowly in
such a way that it expands evenly to install it in
position.
a Put the seal on the tool and push it down
to the flat part of the tool. Then you may
install the tool to the piston to push in the
seal further.
PC200, 200LC, 220, 220LC-8M0
500 Hydraulic system