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 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 air supply disconnected, set jack in its upright, level position. Remove oil filler
screw.
2.
Fill with oil until just below the rim of the oil filler hole. Reinstall the oil filler screw.
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 air supply disconnected, remove the oil filler screw.
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 hole. Reinstall the oil filler screw.
Lubrication
Air pump should be internally lubricated before each use. Use good quality air tool lubricant. If no inline oiler is used,
pour a teaspoon of air tool oil into the air control valve inlet. Operate the jack with air pressure to fully distribute the
oil inside the air motor.
Cleaning
Periodically check the ram for signs of rust/corrosion. Clean as needed and wipe with oily cloth.
Note:
Never use sandpaper or abrasive material on ram surface!
Storage
When not in use, store the jack with 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
• Discontinue use, contact
Blackhawk Technical Service
Jack will not lower after unloading
• Reservoir overfilled
• 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 screw to let pressurized air
escape. Reinstall oil filler screw
Will not lift to full extension
• Fluid level low
• Ensure proper fluid level
