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NOTE: When lift is not in use, lifting arm should be stored in the fully retracted position. Keep lift clean and well
lubricated. Apply a couple of drops of light machine to all pivoting joints as needed. Thoroughly wipe up excess oil
to help prevent slipping and falling.
1. To check hydraulic oil level, remove unit from lift, stand unit upright on a stable, level surface. Remove oil filler
plug. Oil should be to the level of the oil filler plug hole.
2. If low, add high quality hydraulic jack oil ONLY. Never use ANY other fluid. Use of other fluid may result in hydraulic
system failure, causing sudden and unexpected loss of load height.
3. Install oil filler plug, install hydraulic unit into receiver of lift. Secure with provided bolt.
NOTE: To get the longest life possible out of your lift, we recommend changing the hydraulic oil after 7 years of use,
sooner if used in a dust and grit filled environment. Do not expose to moisture. Dry lift completely if it gets wet. Check
pump piston and ram of hydraulic unit periodically for signs of rust and corrosion. Clean mildly affected areas with a
clean oily cloth. Never use abrasives on the pump piston and ram surfaces.
1. Remove hydraulic unit from lift. Stand unit upright on a stable, level surface. Remove oil filler plug and drain old
oil into a suitable container.
2. Fill with high quality hydraulic jack oil.
NOTE: Dispose of used hydraulic oil in accordance with local regulations.
1. Fully lower the lift arms, leave release valve open.
2. Remove oil filler plug. As you remove the oil filler plug you may hear pressurized air escaping from the reservoir.
This means you have successfully purged trapped air from the system.
3. Install oil filler plug.
Symptom
Hydraulic unit will not lift load
Hydraulic unit bleeds off after lift
Lift will not lower after unloading
Poor lift performance
Will not lift to full extension
CARE AND MAINTENANCE
TO CHECK AND ADD HYDRAULIC OIL
TO REPLACE HYDRAULIC OIL
TO PURGE TRAPPED AIR FROM SYSTEM
TROUBLESHOOTING
Possible Causes
• Release valve not tightly closed
• Overload condition
• Release valve not tightly closed
• Overload condition
• Hydraulic unit malfunction
• Reservoir overfilled
• Linkages binding
• Fluid level low
• Air trapped in system
• Fluid level low
• Ensure release valve tightly closed
• Remedy overload condition
• Ensure release valve tightly closed
• Remedy overload condition contact
PRO-LIFT Customer Support
• Ensure Load is removed, then
• Drain fluid to proper level
• Clean and lubricate moving parts
• Ensure proper fluid level
• Follow procedure of to purge trapped
air from system
• Ensure proper fluid level
7
Corrective Action
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