Product Manual

Page 11 of 16
Maintenance Interval
Maintenance Point
Before and after operating
SEAL AND O-RING REPLACEMENT FOR RAM AND
PLUNGER PISTON
 Raise the pallet jack by pumping the handle.
 Remove the shaft (18). This will free the pump and handle
assembly from the pallet jack.
 Remove the oil plug (46), turn the pump over and empty
the oil into a suitable container. Pump the handle until all
the oil has drained. Dispose of the used hydraulic oil
according to local disposal regulations.
 Pull out the plunger piston (40) and/or the ram piston (42).
 Remove all O-rings and seals. See Fig. 6.
 Insert the new O-ring or seal one at a time making sure to
replace with the same size that was removed.
 Reassemble and fill the oil tank through the oil plug hole
with 0.26L (8.8 oz.) of new hydraulic jack oil.
Fig.6
Troubleshooting
Failure
Possible Cause
Corrective Action
Hydraulic unit
does not lift
Air in pump
See ''Bleeding the Air''
Worn O-ring in ram cylinder
Replace the O-ring (refer to ''Seal and
O-Ring Replacement'')
The forks do not
descend
Deformed piston rod
Replace piston rod and cylinder
Piston rod rusted
Lubricate/ replace rod. Keep jack in
lowered position when not in use
Handle tube, nut, or chain broken or
missing
Replace the handle tube
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'')
Pallet jack is loaded beyond capacity
Reduce load to within capacity