© 2004 SPX Corporation
Sheet No.
Issue Date:
Rev. B, 6/07/04
Parts List & Operating Instructions
Form No. 525814
Troubleshooting Guide
Repair procedures must be performed in a dirt-free environment by qualified personnel who are familiar with this equipment.
Trouble
Cause
Solution
Erratic action
1. Air in system
1. Refer to section titled "Bleeding Air from the
Fork Lift Jack."
2. Oil viscosity too high
2. Change to a lower viscosity oil.
3. Internal leakage in cylinder
3. Replace worn packings. Look for
excessive contamination or wear.
4. Cylinder sticking or binding
4. Look for dirt, gummy deposits, leaks,
misalignment, worn parts, defective packings.
Jack does not lift
1. Release valve is open
1. Close release valve.
2. Low/no oil in reservoir
2. Fill with oil and bleed system.
3. Air-locked system
3. Bleed system.
4. Load is above capacity of jack
4. Use correct equipment.
5. Delivery valve and/or bypass
5. Clean to remove dirt or foreign matter.
valve not working correctly
Replace oil.
6. Packing worn out or defective
6. Repair power unit.
Jack lifts only partially
1. Too much or not enough oil
1. Check oil level.
Jack advances slowly
1. Air in system
1. Refer to section titled “Bleeding Air from the
Fork Lift Jack.”
2. Pump not working correctly
2. Repair power unit.
3. Leaking seals
3. Repair power unit or seals.
Jack lifts load, but doesn’t hold
1. Cylinder packing is leaking
1. Repair power unit or seals.
2. Valve not working correctly (suction,
2. Inspect valves. Clean and repair seat
delivery, release, or bypass)
surfaces.
3. Air-locked system
3. Bleed system.
Jack leaks oil
1. Worn or damaged seals
1. Repair power unit or seals.
Jack will not retract
1. Release valve is closed
1. Open or clean release valve.
Jack retracts slowly
1. Cylinder damaged internally
1. Send jack to OTC authorized service center
for repair.
2. Link section is binding
2. Lubricate link section.
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Содержание OTC 1540
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