Maintenance
nOtice:
Use only good quality 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. Premium hydraulic jack oil is recommended.
adding oil
1. With ram plunger fully lowered and pump piston fully depressed, set jack in its upright, level position. Remove
oil filler plug.
2.
Fill with oil until just below the rim of the oil filler hole. Reinstall the oil filler plug.
changing oil
For best performance and longest life, replace the complete fluid supply at least once per year.
1. With ram plunger fully lowered and pump piston fully depressed, remove the oil filler plug.
2. Lay the jack on its side and drain the fluid into a suitable container.
nOtice: Dispose of hydraulic oil in accordance with local environmental regulations.
3.
Fill with oil until just below the rim of oil filler hole.
4. Perform Bleeding/Venting Trapped Air procedure (page 3). Reinstall the oil filler plug.
Lubrication
A periodic coating of light lubricating oil to pivot points, axles and hinges will help to prevent rust and assure that
pump assemblies move freely.
cleaning
Periodically check the pump piston and ram plunger for signs of rust or corrosion. Clean as needed and wipe with
an oily cloth.
nOtice: Do not use sandpaper or abrasive material on ram or pump piston surfaces.
Storage
When not in use, store the jack with pump piston and ram plunger fully retracted and air supply disconnected.
5
trOUBLeSHOOtinG
Symptom
Possible causes
corrective action
Jack will not lift load
• Release valve not tightly closed
• Overload condition
• Ensure release valve tightly closed
•
Remedy overload condition
Jack will lift, but not maintain
pressure
•
Release valve not tightly closed
•
Hydraulic unit malfunction
•
Ensure release valve tightly closed
•
Contact Williams Tech. Service
Jack will not lower after
unloading
• Reservoir overfilled
• Ensure load is removed, then drain
fluid to proper level
Poor lift performance
• Fluid level low
•
Air trapped in system
• Ensure proper fluid level
•
Follow Bleeding/Venting Trapped
Air procedure on page 3
Will not lift to full extension
• Fluid level low
•
Ensure proper fluid level
