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SYSTEM RELIEF VALVE - MAIN POPPET OPEN
POWER BOOST CONTROL CIRCUIT OPERATION - Continued

Technical Manual For Hydraulic Excavator Model 330Lcr 1
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TM 5-3805-281-24-1
Theory of Operation
POWER BOOST CONTROL CIRCUIT OPERATION
9025
05
49
The function of power boost control circuit (K) is to
main hydraulic system can operate at a higher
increase system relief valve pressure setting so the
pressure.
Continued on next page
CED,TX08227,3121
1911MAY981/2
6-48


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