BLACKHAWK! BH8075 - Manual (Page 6)

TROUBLESHOOTING
Symptom Possible Causes Corrective Action
Hydraulic unit will not lift load • Release valve not tightly closed • Ensure release valve tightly closed
Hydraulic unit will lift, but not
maintain pressure • Release valve not tightly closed
• Hydraulic unit malfunction • Ensure release valve tightly closed
• Contact Blackhawk Tech. Service
Hydraulic unit 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
Hydraulic unit will not lift to full
extension • Fluid level low • Ensure proper fluid level
6
MAINTENANCE
Important: Use only a good grade hydraulic jack oil. We recommend Mobil DTE 13M or equivalent. 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.
Adding Oil to Hydraulic Unit
1. With saddle fully lowered set jack in its upright, level position. Locate and remove oil filler plug.
2. Fill with oil even with the bottom of oil filler plug hole. Reinstall the oil filler plug.
Changing Oil to Hydraulic Unit
For best performance and longest life, replace the complete fluid supply at least once per year.
1. Remove hydraulic unit from wheel dolly. Set hydraulic unit upright on a hard, level surface.
2. With saddle fully lowered, remove the oil filler plug.
3. Lay the jack on its side and drain the fluid into a suitable container.
Note: Dispose of hydraulic fluid in accordance with local regulations.
4. Fill with oil even with the bottom of oil filler plug hole. Reinstall the oil filler plug.
5. Install hydraulic unit back to the wheel dolly.
Lubrication
A periodic coating of light lubricating oil to wheel dolly and hydraulic unit pivot points will help to ensure that all
moving parts function smoothly.
Note: Never apply oil to the saddle.
Cleaning
Periodically check the hydraulic unit 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
Store the hydraulic unit with the pump piston, ram plunger, and saddle fully lowered and the release valve open,
but never more than 1 turn. This will help prevent rust and corrosion to those critical surfaces.