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17)
SYSTEM PRESSURE REGULATOR RELIEF SETTING
(1)
Preparation
Keep the hydraulic oil temperature at
①
50±5˚C.
(2)
Measurement
Select the following switch positions.
①
Power mode switch : P mode
·
Slowly operate each control lever of
②
boom, arm and bucket functions at full
stroke over relief and measure the
pressure.
In the swing function, place bucket
③
against an immovable object and
measure the relief pressure.
In the travel function, lock undercarriage
④
with an immovable object and measure
the relief pressure.
(3)
Evaluation
The average measured pressure should be within the following specifications.
Model
HX130CR
HX130LCR
(
) : Power boost
Function to be tested
Boom, Arm, Bucket
Travel
Type 1
Swing
Type 2
7-20
Main pump
a2
Monitoring
(analog)
Cluster
Standard
Port relief setting at 20 lpm
330 (360)±10
330±10
260±10
285±10
a1
Pressure sensor
130ZF7MS15
Unit : kgf / cm
2
380±10
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Table of Contents
Troubleshooting
