Hyundai Robex 22-7, Service Manual

Page: 111 / 120

19-2 Travelling system
19-2-1 Right (or left) hand side of crawler does not work correctly
19-3
Check the spool stroke.
Check the travelling for
both(forward,
backward)directions.
Replace or change over
the relief valve with the
other pump's port and
then test.
Check the action of
the relief valves.
Faulty drive motor.
Check the link system.
Faulty linkage.
Faulty action on spool.
Change over valve section
port A ⇔ port B
Counter balance
valve is faulty.
Check plunger, repair
or replace Ass'y.
Faulty relief valve.
Pump was faulty.
Check the counter
balance valve.
Drive motor broken.
Adjustment or replace.
Replace seals or
block Ass'y.
Internal leak on
swivel joint.
Replace seals
or Ass'y.
Adjust to correct
pressure or replace
relief valve.
Disassemble,
clean or replace.
Replace pump Ass'y.
Check plunger, repair
or replace Ass'y.
Replace motor Ass'y.
Action OK
(relieves pressure)
Action faulty (does
not relieve
pressure)
Faulty
OK
Faulty
Contamination
OK
Low
pressure
No travelling in
either direction
Only one
direction
Problem changed to
opposite direction
Faulty
Faulty
Faulty
OK
OK