Disassembly And Assembly Of Work Equipment Ppc Valve Assembly - Komatsu Galeo PC138US-8 Shop Manual

50 Disassembly and assembly
Disassembly and assembly of
work equipment PPC valve
assembly
(For boom, bucket, arm, swing
control)
Disassembly
1. Remove nut (13), then remove disc (12), nut
(11) and boot (15).
2. Remove bolts, then remove plate (5).
a Do not remove joint (10) unless it is to be
replaced.
3. Remove seal (16) and collar (17).
4. Pull out piston (8), and remove retainer (18),
springs (7), (6) and (5), and shim (4).
a Spring (6), (5) and spring (7), (5) consists
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 mis-
takes when installing.
5. Pull out valve (19) from body (1).
a Do not remove plugs (2), (3).
PC138US, USLC-8
1
SEN02713-00
27