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PROPORTIONAL SOLENOID VALVE TEST AND ADJUSTMENT - Continued
PUMP CONTROL VALVE TEST

Technical Manual For Hydraulic Excavator Model 330Lcr 1
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TM 5-3805-281-24-1
Tests
9. Adjust the solenoid valve (H) as needed.
a. Make a mark on the end of adjusting screw (I) for
the original position of screw. Do not mark on
threads of screw.
b. Loosen nut (J) just enough so adjusting screw (I)
can be turned.
IMPORTANT: Turning adjusting screw out too far may
cause oil leakage because the O-ring
has come off it seat. The length from
end of adjusting screw to nut must not
exceed 4 mm (0.157 in.).
c. Turn adjusting screw in to increase pressure setting;
turn adjusting screw out to decrease setting.
Remember, the length from end of adjusting screw
to nut must not exceed 4 mm (0.157 in.).
Per 1/4 Turn of Adjusting Screw Approximate
Change--Specification
Pressure ........................................................... 98 kPa (0.98 bar) (14 psi)
End of Adjusting Screw to Nut Must Not Exceed--Specification
Length.............................................................................. 4 mm (0.157 in.)
9025
25
d. Hold adjusting screw and then tighten nut.
97
Adjusting Screw-to-Housing Nut--Specification
Torque ........................................................... 8.8 Nm (6.5 lb-ft) (78 lb-in.)
e. Check the pressure setting again.
CED,TX08227,3038 1923MAR985/5
6-244


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