Disassembly And Assembly Of Work Equipment Ppc Valve Assembly - Komatsu PC200-8M0 Shop Manual

SEN06146-00

Disassembly and assembly of work equipment PPC valve assembly

a Only precautions for assembling the work
equipment PPC valve assembly are explained
below.
Disassembly
a Spring (6) and spring (7) consist of each one of
two types of springs with different installed
loads in four places, so check the mounting
position (oil pressure port) and mark with tags
to prevent mistakes when installing.
24
50-500
Disassembly and assembly of work equipment PPC valve
Assembly
a Before assembly, thoroughly clean the parts
and check them for dirt, rust, or damage to pre-
vent failure. Assemble the parts with utmost
care.
a Install spring (5) with its small diameter side on
the shim (4) side.
Diameter of spring (Inside diameter)
q
Small diameter side: f4.9 mm
Large diameter side: f5.55 mm
a When installing springs (6) and (7), note that
they are different and they must be installed to
different hydraulic ports.
q Installed height: 31.9 mm (Common to
both springs)
q Installed load:
Spring (6) (P1, P2): 35.3 N {3.6 kg}
Spring (7) (P3, P4): 21.6 N {2.2 kg}
a When installing piston (8), apply grease (G2-
LI) to its outside and the inside of the body (1)
hole.
3
Bolt (11):
500 Hydraulic system
11.8 – 14.7 Nm {1.2 – 1.5 kgm}
PC200, 200LC, 220, 220LC-8M0
1