35
4111-0016 — Aug. 2019
© 2019 Systems, LLC
Symptom
Possible Cause
Solution
Restraint does not fully
raise or motor over
current device and/
or overload device
continuously tripping.
Low hydraulic fluid.
Add fluid, see page 26 for proper fluid level and
type.
Debris in tank.
Drain and clean tank. If debris cannot be cleaned
out replace tank.
Restraint does not raise.
Faulty spool valve.
Remove coil from cartridge valve and cartridge valve
from valve block.
-Check valve for contaminants and/or damage.
-Replace valve if damaged.
-Carefully wipe valve with clean rag (do not damage
“O” rings on valve).
NOTE:
Do not over-tighten coil on valve. Max torque is
0.83 ft. lbs. (just over finger tight). Do not over-tighten
valve into block. Max torque is 15 ft. lbs. which will
compress O-ring and prevent leakage.
Operate unit. Replace valve if problem persists after
all other troubleshooting procedures performed.
Solenoid energized.
Locate solenoid (see page 40).
Coil should not be energized when Powerhold is in
engage mode.
Relay or controller contact has stuck contacts. Test
coil for magnetism. Coil must be de-energized to
release the transport vehicle.
Combination Units Only
Restraint does not raise
but leveler raises.
Solenoid not energized.
Locate solenoid (see page 40).
Coil must be energized when Powerhold is in
disengage mode.
Check valve for magnetism at the coil.
Faulty spool valve.
Remove coil from cartridge valve and cartridge valve
from valve block.
-Check valve for contaminants and/or damage.
-Replace valve if damaged.
-Carefully wipe valve with clean rag (do not damage
“O” rings on valve).
NOTE:
Do not over-tighten coil on valve. Max torque is
0.83 ft. lbs. (just over finger tight). Do not over-tighten
valve into block. Max torque is 15 ft. lbs. which will
compress O-ring and prevent leakage.
Operate unit. Replace valve if problem persists after
all other troubleshooting procedures.
TROUBLESHOOTING