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DISASSEMBLE AND ASSEMBLE CONTROL VALVE
DISASSEMBLE AND ASSEMBLE CONTROL VALVE

Maintenance Manual For Hydraulic Excavator 230Lcr And 230Lcrd With Rock Drill 2
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TM 5-3805-280-24-2
Hydraulic System
NOTE: It is not always necessary to remove the
Tighten plug (39).
control valve to remove individual components.
Pump Control Valve-to-Housing Plug--Specification
The letters, A--D, are used in the illustration to
Torque....................................................................... 84 Nm (62 lb-ft)
indicate the location of parts in housing.
3. Tighten cap screws (69).
2. Rear pump control valve (24): Disassemble valve
for cleaning and inspections only. Valve is serviced
Pilot Plate-to-Housing Cap Screw--Specification
as an assembly. Valve is set at the factory so
adjustment in the field should not be necessary. If
Torque....................................................................... 78 Nm (58 lb-ft)
disassembly of lock nut (35) and adjusting screw
(36) from plug (39) is necessary, check valve
4. Tighten plug (8).
pressure setting after assembly. (See Pump Control
Plug-to-Propel Flow Control Valve Pilot Plate--Specification
Valve Test in Group 9025-25.)
Torque....................................................................... 98 Nm (72 lb-ft)
Pull flow sense spool (46) and sleeve (47) from
housing (52) using a M8-1.25 nut on threaded end
of spool.
Continued on next page
TX,33,UU4003
1921SEP986/17
33
3360
99
21-133


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