5
CAUTION: When not in use, do not allow heavy
loads to remain on the forks for an extended
period of time. Always lower forks completely
when not in use.
MAINTENANCE
For optimum performance, lubricate chain (49)
with light oil periodically.
Trouble-Shooting for HLPT Series Pallet Trucks
Trouble
Possible Cause
Remedy
(with parts list reference number)
Forks do not lift to
maximum height.
1. Hydraulic oil level low.
1. Lower forks fully and add
hydraulic oil to fill hole (89A) up
to bottom level. [About 0.92
liters]
Forks will not lift.
1. Oil level is low, or oil is too
viscous.
2. Oil has impurities.
3. Hex nut (47) is too high on
anchor bolt (48) and release
valve not closing.
4. Air trapped in hydraulic system.
1. Fill with oil, or change oil.
2. Change
oil.
3. Adjust hex nut on anchor bolt to
allow release valve to close
properly.
4. Release air from system by
pulling handle lever (25), then
pumping handle up and down
several times.
Forks will not lower.
1. Lifting piston (90) is deformed
from overloading.
2. The fork was kept in high
position for extended time
resulting in rusting and jammed
of the exposed piston rod.
3. Hex nut (47) not adjusted
properly on anchor bolt (48).
4. Fork frame (1) and fork roller
(6) are jammed.
1. Replace lifting piston.
2. Always keep forks in lowest
position when not in use. Keep
ram and lifting piston lubricated
and away from moisture.
3. Adjust hex nut to allow release
valve to close properly.
4. Correct jam; replace fork roller if
necessary.
Hydraulic fluid leak.
1. Seal parts worn or damaged.
2. Some parts cracked or worn.
1. Replace worn or damaged parts.
2. Replace damaged or cracked
parts.
Forks descend without
pulling release valve
handle.
1. Release valve unable to close
properly due to impurities in
hydraulic oil.
2. Hydraulic system cracked or
bored.
3. Air trapped in hydraulic pump.
4. Seal parts worn or damaged in
hydraulic pump.
5. Hex nut (47) is not in correct
position on anchor bolt (48).
1. Replace with new hydraulic oil.
2. Inspect and replace damaged
parts.
3. Release air from pump by pulling
handle lever (25), then pumping
handle up and down several
times.
4. Replace worn or damaged parts
5. Adjust hex nut to allow release
valve to close properly.
