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. Release valve is open.
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. Packing worn out or defective.
1. Close release valve.
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 hydraulic unit.
1. Too much or not enough oil.
1. Check oil level.
1. Pump not working correctly.
2. Leaking seals.
1. Replace hydraulic unit.
2. Replace hydraulic unit.
1. Cylinder packing is leaking.
2. Valve not working correctly (suction,
delivery, release, or bypass).
3. Air-locked system.
1. Replace hydraulic unit.
2. Inspect valves. Clean and repair seat
surfaces.
3. Bleed system.
1. Worn or damaged seals.
1. Replace hydraulic unit.
1. Release valve is closed.
1. Open release valve all the way
counterclockwise (CCW). May be
necessary to clean release valve.
1. Cylinder damaged internally.
2. Link section is binding.
1. Send jack to OTC-authorized service
center. (Refer to OTC Form No. 104060.)
2. Lubricate or replace link section.
Parts List & Operating Instructions
Form No. 522982, sheet 3 of 3, back
troubleshooting Guide
Repair procedures must be performed in a dirt-free environment by qualified personnel who are familiar with
this
equipment.
CAUtION: All inspection, maintenance, and repair procedures must be performed when the jack
is free of a load (not in use).
trouble
Cause
Solution
