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MAINTENANCE
Important: Use only a good 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 failure of the jack and the potential for sudden and
immediate loss of load. We recommend Hein-Werner hydraulic jack oil HW 93291.
Adding oil
1. Lower saddle fully.
2. Set jack in its upright, level position.
3. Locate and remove air vent screw.
4. Fill with oil until ~3/16" above the inner cylinder as seen from the air vent screw hole.
5. Reinstall the air vent screw.
Changing oil
For best performance and longest life, replace the complete hydraulic fluid at least once a year.
1. Lower saddle fully.
2. Remove the air vent screw.
3. Lay the jack on its side and drain the fluid into a suitable container.
Note: Dispose of hydraulic fluid in accordance with local regulations.
4. Fill with oil until ~3/16" above the inner cylinder as seen from the air vent screw hole.
5. Reinstall the air vent screw.
Lubrication
A periodic coating of light lubricating oil to pivot points, axles and hinges will help to prevent rust and assure
that wheels, castors and pump assemblies move freely.
Cleaning
Periodically check the pump piston and ram for signs of rust or corrosion. Clean as needed and wipe with an oily cloth.
Note: Never use sandpaper or abrasive material on these surfaces!
Storage
Lower the saddle to its lowest position when not in use.
TROUBLESHOOTING
Symptom
Jack will not lift load
Jack bleeds off after lift
Jack will not lower after unloading
Will not lift to full extension
Possible Causes
• Release knob not tightly closed
• Overload condition
• Hydraulic unit malfunction
• Reservoir overfilled
• Linkages binding
• Fluid level low
• Fluid level low
Corrective Action
• Ensure release knob tightly closed
• Remedy overload condition
• Contact Hein-Werner Technical Service
• Drain fluid to proper level
• Clean and lubricate moving parts
• Ensure proper fluid level
• Ensure proper fluid level
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