Product Manual

Page 12 of 17
Troubleshooting
Failure
Possible Cause
Corrective Action
Hydraulic unit
does not lift
Low oil level.
Make sure there is no oil leakage from
Release Screw (35), Pressure
Adjustment Screw (33) or valve area.
Then add oil.
Air in pump.
See ''BLEEDING THE AIR''.
Worn O-ring in ram cylinder.
Replace O-ring (refer to ''Seal and O-
Ring Replacement'').
Once lifted, truck
lowers by itself
Air comes into the oil.
See ''BLEEDING THE AIR''.
Worn O-ring in ram cylinder.
Replace O-ring (refer to ''Seal and O-
Ring Replacement'').
Release valve not seated properly.
See ''BLEEDING THE AIR''.
Pallet truck loaded beyond capacity.
Reduce load to within capacity.
Release valve not adjusted properly.
Adjust valve by Pressure Adjustment
Screw (33) and Release Screw (35).
Oil leakage from Release Screw (38) or
Pressure Adjustment Screw (40).
Tighten Release Screw (35). Replace
O-rings on Release Screw (35) and/or
Pressure Adjustment Screw (33). If
leakage continues, contact authorized
service center.
Fork does not
lower
Cam requires adjustment.
Refer to ''Up-Down Cam Adjustment''.
Cam (14) is damaged.
Replace Cam (17).
Damaged push rods and/or linkages.
Replace damaged parts. (It is
recommended that an authorized
service center perform this work.)
Lever does not
stay in the
neutral position
Cam requires adjustment.
Refer to ''Up-Down Cam Adjustment''.