Hyundai Robex 22-7, Service Manual

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19-1 Troubleshooting
19-1-1 All functions not operational
19-1
19-1-2 Operation power is weak
If not enough
Yes
Flow
low
Pressure
incorrect
Faulty
pump
Deterioration of
the HYD. oil
Check the level of
HYD. oil.
Pumps or couplings
faulty.
Fill up with HYD. oil.
Replace pump Ass'y or
couplings.
If not enough
Disassemble, check
Fill up with HYD. oil.
Clean up suction filter.
Repair faulty piping part.
Check cause of bubbles
and remove it.
Replace pump Ass'y.
Replace HYD. oil.
Adjust to correct
pressure.
Clean, disassemble, adjust
or replace Ass'y.
Replace Ass'y.
Intake system faulty.
HYD. oil has
bubbles in it.
Large internal leak
on pump.
Relief valve faulty
adjustment.
Faulty relief valve.
Check the level of
HYD. oil.
Abnormal noise
occur from pump.
Check the level of HYD. oil
flow from pump.
Check the pressure on
main relief valve.
Large internal leak on
control valve.
OK
No
OK
OK