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DISASSEMBLE AND ASSEMBLE SYSTEM RELIEF VALVE - Continued
REMOVE AND INSTALL HYDRAULIC OIL TANK

Maintenance Manual For Hydraulic Excavator 230Lcr And 230Lcrd With Rock Drill 2
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TM 5-3805-280-24-2
Hydraulic System
DISASSEMBLE AND ASSEMBLE CIRCUIT RELIEF AND ANTI-CAVITATION VALVE
A--Nut
G--Backup Ring
L--Cartridge
Q--Adjusting Screw
B--Plug
H--Anti-Cavitation Sleeve
M--Pilot Poppet
C--O-Ring (2 used)
I--Piston
N--Anti-Cavitation Sleeve
D--Backup Ring
J--Main Poppet
Spring
E--O-Ring
K--Piston and Main Poppet
O--Pilot Poppet Spring
F--O-Ring
Spring
P--O-Ring
Circuit Relief and Anti-Cavitation Valve-to-Housing--
1. Disassemble valves for cleaning and inspection
Specification
only. Valves are serviced as assemblies.
Torque....................................................................... 83 Nm (62 lb-ft)
2. Tighten nut (A).
3. Check and adjust pressure setting. (See Circuit
Adjusting Screw-to-Plug Nut--Specification
Relief Valve Test and Adjustment in Group
9025-25.)
Torque................................................................. 29.5 Nm (264 lb-in.)
33
Tighten valve into housing.
3360
115
TX,33,UU3803
1921SEP981/1
21-147


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