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

Maintenance Manual For Hydraulic Excavator Model 230Lcr
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TM 5-3805-280-24-1
Tests
Auto-Idle--Specification
Position .................................................................................................. Off
Propel Speed Switch--Specification
Position ..................................................................................... Fast Speed
Arm Regenerative (SC)--Specification
Pressure ............................................................. Laptop computer reading
196 kPa (1.96 bar) (28 psi)
Speed Sensing (SD)--Specification
Pressure ............................................................. Laptop computer reading
196 kPa (1.96 bar) (28 psi)
Propel Speed Change (SI)--Specification
Pressure ............................................................. Laptop computer reading
196 kPa (1.96 bar) (28 psi)
Power Boost (SG)--Specification
Pressure ............................................................. Laptop computer reading
196 kPa (1.96 bar) (28 psi)
For arm regenerative solenoid valve (SC), operate
boom up and arm in functions in combined
operation.
9025
For speed sensing solenoid valve (SD), operate arm
25
87
in function over relief and boom up function to load
the engine.
For propel speed change solenoid valve (SI), drive
the machine at fast speed propel.
For power boost solenoid valve (SG), push and
release power boost button on right control lever.
7. Compare pressure readings from the gauge and laptop
computer. The pressure reading from gauge must be
within the specified range of calculated pressure
reading on the computer.
Continued on next page
TX,9025,GG2121 1921MAY985/6
6-218


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