Product Manual

Page 11 of 16
Maintenance Interval
Maintenance Point
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 pump over and empty the
oil into a suitable container. Pump the handle until all the
oil has drained. Dispose of used hydraulic oil according to
local disposal regulations.
 Pull out the plunger piston (40) and/or 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 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, 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").
Pallet jack loaded beyond capacity.
Reduce load to within capacity.
Damaged push rods and/or linkages.
Replace damaged parts. (It is
recommended that an authorized
service center perform this work.)
Fluid leak
Component, likely seal, worn or
damaged.
Inspect and replace worn or damaged
parts.