EPPR VALVE CHECK PROCEDURE
4)
(1)
Check electric current value at EPPR valve
Disconnect connector CN-75 from
①
EPPR valve.
Insert the adapter to CN-75 and install
②
multimeter as figure.
Start engine.
③
Set S-mode and cancel auto decel
④
mode.
Position the accel dial at 10.
⑤
If rpm display show approx 1750 ± 50
⑥
rpm check electric current at bucket
circuit relief position.
Check electric current at bucket circuit
⑦
relief position.
(2)
Check pressure at EPPR valve
Remove plug and connect pressure
①
gauge as figure.
·Gauge capacity : 0 to 50 kgf/cm
Start engine.
②
Set S-mode and cancel auto decel
③
mode.
Position the accel dial at 10.
④
If tachometer show approx 1750 ± 50
⑤
rpm check pressure at relief position of
bucket circuit by operating bucket control
lever.
If pressure is not correct, adjust it.
⑥
After adjust, test the machine.
⑦
2
(0 to 725 psi)
5-52
5-52
Spec : 100~700 mA
Adapter(P/no.:21Q6-50410)
EPPR valve
Multimeter
CN-75
Main pump
Spec : 2~25 kgf/cm
(30~350 psi)
2
Pressure adjusting
screw locknut
EPPR valve
CN-75
Valve casing
Main pump
Valve casing
145ZF5MS21
Pilot pressure
supply line
145ZF5MS22