Hyundai HX145 LCR, Manual

Page: 396 / 702

6-41
Main pump
Valve casing
EPPR valve
CN-75
Multimeter
TEST PROCEDURE TEST PROCEDURE
Test 1 Test 1 : Check resistance at connector
CN-75.
Starting switch OFF.
Disconnect connector CN-75 from EPPR
valve at main hydraulic pump.
Check resistance between 2 lines as
figure.
(1) (1)
①
②
③
Test 2 Test 2 : Check electric current at EPPR
valve.
Disconnect connector CN-75 from EPPR
valve.
Insert the adapter to CN-75 and install
multimeter as figure.
Start engine.
Set S-mode and cancel auto decel
mode.
Position the multimodal dial at 10.
If tachometer show approx 1750
±
50 rpm
disconnect one wire harness from EPPR
valve.
Check electric current at bucket circuit
relief position.
(2) (2)
①
②
③
④
⑤
⑥
⑦
SPEC : 15~25
Ω
(20˚C)
14096MS33
Test 3 Test 3 : Check pressure at EPPR valve.
Remove plug and connect pressure
gauge as figure.
·
Gauge capacity : 0 to 50 kgf/cm
2
(0 to 725 psi)
Start engine.
Set S-mode and cancel auto decel
mode.
Position the multimodal dial at 10.
If tachometer show approx 1750
±
50 rpm
check pressure at relief position of bucket
circuit by operating bucket control lever.
If pressure is not correct, adjust it.
After adjust, test the machine.
(3) (3)
①
②
③
④
⑤
⑥
⑦
2) 2)
Multimeter
CN-75
EPPR valve
Main pump
Adapter(P/no.:21Q6-50410)
Valve casing
Main pump
Pressure adjusting
screw locknut
Valve casing
CN-75
EPPR valve
Pilot pressure
supply line
Spec : 100~700 mA
Spec : 2~25 kgf/cm
2
(30~350 psi)
14095MS21
14095MS22