TESTING AND ADJUSTING
TESTING AND ADJUSTING CONTROL PUMP CIRCUIT OIL PRESSURE
TESTING AND ADJUSTING
CONTROL PUMP CIRCUIT OIL
PRESSURE
MEASURING
j, Hydraulic oil temperature when measuring: 45 - 55°C
1. Remove pressure pick-up plug (1) (Thread dia.=
1 Omm, Pitch = 1.25 mm), and install oil pressure
guage CI (5.88 MPa (60 kg/cm?).
2.
Start the engine and measure with engine at high
idling.
* When testing for internal leakage of the equipment in
the control circuit, use the parts given below to shut off
the circuit for the follwing sections when measuring the
relief pressure.
No.
Section of hydraulic circuit shut off
Component that can be
checked
1 Control pump outlet port
Control pump
2
Solenoid valve inlet port
Solenoid valve
3
Travel PPC valve inlet port
Travel PPC valve
4
R.H. PPC valve inlet port
R.H. PPC valve
5
L.H. PPC valve inlet port
L.H. PPC valve
*
Items No. 2 and below can be checked if the equip-
ment in the previous number is normal.
*
Use the following parts to shut off the circuit.
l For elbow
Sleeve nut
: 07221-20210,07221-20315
07221-20422
Plug
: 07222-00210,07222-00315
07222-00414
l For hose
Plug
: 07376-50210,07376-50315
07376-50422
c1
’ +3
XiOAV271
STD
/FiipC R.H. PPC -‘L.H.PPCI
Solenoid valve
valve
valve
valve
Accumulator
XlOAV273
20-47
a
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