Troubleshooting Guide - OTC 5303 Lista De Partes E Instrucciones De Funcionamiento

Parts List & Operating Instructions
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
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
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Troubleshooting Guide

Cause
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. Too much or not enough oil.
1. Pump not working correctly.
2. Leaking seals.
1. Cylinder packing is leaking.
2. Valve not working correctly (suction,
delivery, release, or bypass).
3. Air-locked system.
1. Worn or damaged seals.
1. Release valve is closed.
1. Cylinder damaged internally.
2. Link section is binding.
Form No. 567148
Solution
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. Check oil level.
1. Replace hydraulic unit.
2. Replace hydraulic unit.
1. Replace hydraulic unit.
2. Inspect valves. Clean and repair seat
surfaces.
3. Bleed system.
1. Replace hydraulic unit.
1. Open release valve all the way
counterclockwise (CCW). May be
necessary to clean release valve.
1. Send jack to OTC-authorized service
center. (Refer to OTC Form No. 104060.)
2. Lubricate link section.
3 of 3
Sheet No.
Issue Date: Rev. B February 21, 2013