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CONTROL VALVE NEUTRAL AND POWER PASSAGES OPERATION
SYSTEM RELIEF AND POWER BOOST VALVE OPERATION

Maintenance Manual For Hydraulic Excavator Model 230Lcr
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TM 5-3805-280-24-1
Theory of Operation
(C and P), through the pump control valves (K and X),
Supply oil from the front pump (M) flows to the right
and into the return passage (D). Power passages (N)
control valve. Supply oil from the rear pump (O) flows
in the left and right control valves are used to route
to the left control valve. When all functions are in
supply oil for the combined operation of functions.
neutral supply oil flows through the neutral passages
TX,05,GG2191
1920MAY982/2
9025
05
41
6-39


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