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 premature failure of the jack and the
potential for sudden and immediate loss of load. We recommend Hein-Werner HW93291 or equivalent.
Adding oil
1. With ram plunger fully lowered and pump piston fully depressed, set jack in its upright, level position. Remove oil
filler screw/plug.
2. Fill with oil until just below the rim of the oil filler screw/plug hole. Reinstall the oil filler screw/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 screw/plug.
2. Lay the jack on its side and drain the fluid into a suitable container.
Note:
Dispose of hydraulic oil in accordance with local regulations.
3. Fill with oil until just below the rim of the oil filler screw/plug hole. Reinstall the oil filler screw/plug.
Lubrication
1. 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.
2. When used on a daily basis, air pump should be internally lubricated before each use. Use
only
good quality air
tool lubricant. If no inline oiler is used, pour a teaspoon of air tool oil into the inlet of the air control valve. Simply
operate the jack using the air feature in order to fully distribute the oil.
Cleaning
Periodically check the pump piston and ram plunger 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 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
• Air pressure inadequate
• Ensure release valve tightly closed
•
Remedy overload condition
•
Ensure adequate air pressure
Jack will lift, but not maintain
pressure
•
Release valve not tightly closed
•
Hydraulic unit malfunction
•
Ensure release valve tightly closed
•
Contact Blackhawk 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
•
With ram fully retracted, remove oil
filler plug/screw to let pressurized
air escape, then reinstall oil filler
plug/screw
Will not lift to full extension
• Fluid level low
•
Ensure proper fluid level
