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230 REMOVE AND INSTALL RIGHT BOOM CYLINDER CONTROLLED LOAD LOWERING VALVE - Continued
REMOVE AND INSTALL BOOM CYLINDER - Continued

Maintenance Manual For Hydraulic Excavator 230Lcr And 230Lcrd With Rock Drill 2
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TM 5-3805-280-24-2
Hydraulic System
CAUTION: The hydraulic oil tank is pressurized.
High pressure release of oil from pressurized
system can cause serious burns or penetrating
injury. Release pressure from tank by loosening
vent plug. It is not necessary to remove vent
plug.
2. Loosen vent plug (A) to release air pressure from
hydraulic oil tank.
A--Vent Plug
Continued on next page
TX,33,UU3810
1922SEP982/5
33
3360
144
21-176


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