Sheet No.
Issue Date: Rev. D, July 25, 2005
© SPX Corporation
Jack does not lift
Jack lifts only partially
Jack advances slowly
Jack lifts load, but doesn’t hold
Jack leaks oil
Jack will not retract
Jack retracts slowly
1. Control valve in wrong position.
2. Low/no oil in reservoir.
3. Air-locked system.
4. Load is above capacity of jack.
5. Delivery valve and/or bypass
valve not working correctly.
6. Seals worn out or defective.
1. Move control valve to UP position.
2. Fill with oil and bleed system.
3. Bleed system.
4. Use correct equipment.
5. Clean to remove dirt or foreign
matter. Replace oil.
6. Replace with seal kit No. 515349 for
the 5093 or seal kit No. 515353 for
the 5094.
1. Too much or not enough oil.
1. Check oil level.
1. Pump not working correctly.
2. Leaking seals.
1. Replace with seal kit No. 515349 for
the 5093 or seal kit No. 515353 for
the 5094.
2. Replace with seal kit No. 515349 for
the 5093 or seal kit No. 515353 for
the 5094.
1. Cylinder packing is leaking.
2. Valve not working correctly
(suction, delivery, release, or
bypass).
3. Air-locked system.
1. Replace with seal kit No. 515349 for
the 5093 or seal kit No. 515353 for
the 5094.
2. Inspect valves. Clean and repair
seat surfaces.
3. Bleed system.
1. Worn or damaged seals.
1. Replace with seal kit No. 515349 for
the 5093 or seal kit No. 515353 for
the 5094.
1. Control valve in wrong position.
1. Move control valve to DOWN
position.
1. Cylinder damaged internally.
1. Send jack to OTC-authorized service
center. (Refer to OTC Form No.
104031.)
Troubleshooting Guide
Repair procedures must be performed in a dirt-free environment by qualified personnel who are familiar with
this equipment.
CAUTION: To prevent personal injury, all inspection, maintenance, and repair procedures must be
performed when the jack is free of a load (not in use) and disconnected from the air supply.
Trouble
Cause
Solution
Parts List & Operating Instructions
Form No. 107273
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