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PUMP CONTROL VALVE TEST - Continued
HYDRAULIC PUMP REGULATOR ADJUSTMENTS

Maintenance Manual For Hydraulic Excavator Model 230Lcr
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TM 5-3805-280-24-1
Tests
9. A pressure reading not in the ranges given can be an
indication of contamination or sticking spools in the
front (F) or rear (H) pump control valve. Before making
any adjustments, check the front and rear pump control
valve pressure sensors and the operation of remote
control spool in front and rear pump regulators.
Turn the adjusting screw in to increase pressure
reading; turn adjusting screw out to decrease pressure
reading.
9025
25
93
E--Right Control Valve
F--Front Pump Control Valve
G--Left Control Valve
H--Rear Pump Control Valve
TX,9025,GG2652 1921MAY986/6
6-224


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