Hyundai Robex 22-7, Service Manual

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19-3-4 Extreme slow turning speed
19-8
19-3-5 Turning movement when the machine is parked on a slope
Clean or replace.
Low
pressure
Relief valve is sticking
Does the turning
speed meet the
specified speed?
Check the action of
the turning operation
system (dozer, swing).
Change over relief
valves to the other
pump port or replace,
then test.
Check the turning
circuit pressure.
Internal leak on
turning motor.
Faulty relief valve.
Faulty relief valve.
Disassemble,
clean or replace.
Faulty control valve.
Change over outlet
hoses to pump
No.1's or No.2's,
then test.
Yes
Slow
OK
OK
OK
Faulty
Faulty
Faulty
Low
pressure
Clean or replace.
OK
Adjust to correct
pressure or replace.
Replace valve
or Ass'y.
Is the distance lower
than tolerance?
Check the turning
pressure.
Internal leak on
turning motor.
Faulty relief valve.
OK
Replace motor Ass'y.
OK
Yes
No
Low
pressure