TROUBLESHOOTING
MAINTENANCE
Important: Use only 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 premature failure of the jack and the
potential for sudden and immediate loss of load. Hein-Werner HW93291 or equivalent is recommended.
Adding oil
1. With saddle fully lowered, set jack in its upright, level position. Remove oil filler plug.
2. Fill until oil is level with the oil filler hole, reinstall oil filler plug.
Changing oil
For best performance and longest life, replace the complete fluid supply at least once per year.
1. With saddle fully lowered, remove oil filler plug.
2. Lay the jack on its side and drain the fluid into a suitable container.
Note.
Dispose of hydraulic fluid in accordance with local regulations.
3. Set jack in its level position. Fill until oil is level with the oil filler hole, reinstall 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
casters 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
When not in use, store the jack with saddle fully lowered.
5
Symptom
Possible Causes
Corrective Action
Jack will not lift load
• Release valve not tightly closed
• Load is too heavy
• Ensure release valve tightly closed
•
Consider higher capacity jack
Jack will lift, but not maintain
pressure
•
Release valve not tightly closed
•
Hydraulic unit malfunction
•
Ensure release valve tightly closed
•
Discontinue use, Contact
Blackhawk Tech. Service
Jack will not lower after unloading
• Reservoir overfilled
• Linkage binding
• Ensure load is removed, then drain
fluid to proper level
• Clean and lubricate moving parts
Poor lift performance
• Fluid level low
•
Air trapped in system
• Ensure proper fluid level
•
With ram fully retracted, remove
oil filler plug to let pressurized air
escape, then reinstall oil filler plug
Jack will not lift to full extension
• Fluid level low
•
Ensure proper fluid level
