4
5. MAINTENANCE
Important: Use only high-grade hydraulic jack oil. Avoid mixing different types of fluid and
NEVER use brake fluid, turbine oil, transmission fluid, motor oil or glycerin. Improper fluid can
cause premature failure of the jack and the potential for sudden and immediate loss of load.
5.1 Adding Oil: With the saddle lowered, set the jack in its upright, level position. Remove oil
filler plug/screw. (The oil should be within 3/8" from the top of the filler plug hole).
5.2 Changing Oil: With the saddle fully lowered, set the jack in an upright level position.
Remove the oil filler plug/screw. Lay the jack on its side and drain the oil into a suitable
container. Set the jack in its level upright position. Fill oil until just below the rim of the filler
hole. Reinstall oil filler plug/screw.
5.3 Lubrication: A periodic coating of light lubricating oil to pivot points, axles and hinges
will help prevent rust and assure that wheels, casters and pump assemblies move freely
5.4 Cleaning: Periodically check the ram for signs of rust or corrosion. Clean as needed and
wipe with an oily cloth.
Note: Ensure the jack is inspected and maintained on an annual basis by a qualified
technician.
Symptom
Possible Causes
Corrective Action
Jack does not lift.
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.
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 power unit.
Jack lifts only partially.
1. Too much or not enough oil.
1. Check oil level.
Jack advances slowly.
1. Pump not working correctly.
2. Leaking seals.
1. Install seal kit or replace power unit.
2. Install seal kit or replace power unit.
Jack lifts load, but does
not hold.
1. Cylinder packing is leaking.
2. Valve not working correctly.
3. Air-locked system.
1. Install seal kit.
2. Inspect valves. Clean and
repair seat surfaces.
3. Bleed system.
Jack leaks oil.
1. Worn or damaged seals.
1. Install seal kit.
Jack will not retract.
1. Release valve is closed.
1. Open or clean release valve.
Jack retracts slowly.
1. Cylinder damaged internally.
2. Link section is binding.
1. Install seal kit.
2. Lubricate link section.
6. TROUBLESHOOTING
