Specification

MAINTENANCE
Important: Use only a good grade hydraulic 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 ram 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 ram in its upright, level position. Remove oil
filler plug.
2. Fill with oil until just below the rim of the oil filler hole. Reinstall the oil filler 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 plug.
2. Lay the ram 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 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. For air option model BH2081: 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 ram 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 ram with pump piston and ram plunger fully retracted and air supply disconnected.
5
TROUBLESHOOTING
Symptom Possible Causes Corrective Action
Ram will not lift load
• Release valve not tightly closed
• Load is too heavy
• Ensure release valve tightly closed
• Consider higher capacity ram
Ram will lift, but not maintain
pressure
• Release valve not tightly closed
• Hydraulic unit malfunction
• Ensure release valve tightly closed
• Contact Blackhawk Tech. Service
Ram 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 to let pressurized air
escape, then reinstall oil filler plug
Will not lift to full extension • Fluid level low • Ensure proper fluid level