20-112
PC58UU-3
b
TESTING AND ADJUSTING
HYDRAULIC PRESSURE IN WORK EQUIPMENT,
SWING, AND TRAVEL CIRCUITS
TESTING AND ADJUSTING
HYDRAULIC PRESSURE IN
WORK EQUIPMENT, SWING,
AND TRAVEL CIRCUITS
Measuring
★
Oil temperature for measurement: 45 - 55 °C
1. Measuring unload oil pressure
1) Remove oil pressure pickup plug (1) (10
mm, P = 1.25) and install oil pressure gauge
C1 (39.2 MPa {400 kg/cm²}).
2) Run the engine at full throttle and set all
control levers in neutral and measure the
oil pressure.
2. Measuring work equipment relief pressure
1) Remove oil pressure pickup plug (1) (10
mm, P = 1.25) and install oil pressure gauge
C1 (39.2 MPa {400 kg/cm²}).
2) Run the engine at full throttle and relieve
each actuator and measure the oil pressure
at this time.
3. Measuring travel circuit relief pressure
1) Remove oil pressure pickup plug (1) and (2)
(10 mm, P = 1.25) and install oil pressure
gauge C1 (39.2 MPa {400 kg/cm²}).
2) Run the engine at full throttle and relieve
the travel pump and measure the oil pres-
sure at this time.
Before removing the oil pressure
pickup plug, release the residual
pressure from hydraulic tank.
After installing the oil pressure
gauge, pressurize the hydraulic
tank. For details, see Pressuriz-
ing hydraulic tank.
Move each cylinder to the
stroke end.
Put block
b
against the
grouser of the track shoe or
put block
c
between the
sprocket and frame to lock
the track shoe.
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