Product Manual

Page 12 of 17
Maintenance Interval
Maintenance Point
UP-DOWN CAM ADJUSTMENT
When pumping the handle with the lever in the "Neutral"
position, there should be no movement of the fork. If there is
fork movement, the cam must be adjusted:
 Place the lever in the "Neutral" position.
 Loosen the Hex Nut (19).
 Adjust the Socket Head Cap Screw (20) while pumping
the handle until there is no longer any movement of the
ram.
 Tighten the Hex Nut (19).
Troubleshooting
Failure
Possible Cause
Corrective Action
Hydraulic unit
does not lift
Low oil level
Make sure there is no oil leakage from
the Release Screw (38), Pressure
Adjustment Screw (59), or the valve
area. Then add oil.
Air in pump
See "BLEEDING THE AIR" section.
Worn O-ring in ram cylinder
Replace O-ring (refer to "Seal and O-
Ring Replacement").
Once lifted, pallet
jack 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 jack loaded beyond capacity
Reduce load to within capacity.
Release valve not adjusted properly
Adjust valve by Pressure Adjustment
Screw (59) and Release Screw (38).
Oil leakage from Release Screw (38) or
Pressure Adjustment Screw (40)
Tighten Release Screw (38). Replace
O-rings on Release Screw (38) and/or
Pressure Adjustment Screw (59). 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.)