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OPERATION
(cont.)
3. Slowly turn the handle counter-clockwise, but no more than 1/2 full turn. If the load fails to lower:
a. Use a functioning jack to raise the vehicle high enough to reinstall jack stands.
b. Remove the malfunctioning jack and then the jack stands.
c. Use the functioning jack to lower the vehicle.
4. After removing jack from under the vehicle, lower lifting arm completely to reduce ram exposure to rust and
contamination.
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 saddle fully lowered set jack in its upright, level position. Remove vent screw.
2.
Fill with oil until ~3/16" above the inner cylinder as seen from the oil filler hole. Reinstall vent screw.
Changing oil
For best performance and longest life, replace the complete fluid supply at least once per year.
1. With saddle fully lowered, remove vent screw.
2. Lay the jack on its side and drain the fluid into a suitable container.
NOTICE: Dispose of hydraulic fluid in accordance with local environmental regulations.
3. Fill with oil until ~3/16" above the inner cylinder as seen from the oil filler hole. Reinstall 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, casters and pump assemblies move freely. Lubricate lift arm through grease fittings.
Cleaning
Check the pump piston and ram 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 and pump piston surfaces.
Storage
When not in use, store the jack with saddle fully lowered.
TROUBLESHOOTING
Symptom
Jack will not lift load
Jack will lift, but not maintain
pressure
Jack will not lower after unloading
Poor lift performance
Will not lift to full extension
Possible Causes
• Release valve not tightly closed
• Load is too heavy
• Release valve not tightly closed
• Hydraulic unit malfunction
• Reservoir overfilled
• Linkages binding
• Fluid level low
• Hydraulic unit malfunction
• Fluid level low
4
Corrective Action
• Ensure release valve tightly closed
• Consider higher capacity jack
• Ensure release valve tightly closed
• Discontinue use, contact
Blackhawk technical service
• Drain fluid to proper level
• Clean and lubricate moving parts
• Ensure proper fluid level
• Follow Bleeding/Venting Trapped
Air procedure on page 3
• Ensure proper fluid level
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