5
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Symptom
Possible causes
corrective action
Jack will not lift load
• Release valve not tightly closed
• Load is too heavy
• Ensure release valve tightly closed
• Consider higher capacity jack
Jack will lift, but not maintain
pressure
•
Release valve not tightly closed
• Hydraulic unit malfunction
•
Ensure release valve tightly closed
• Discontinue use, contact your local
Fastenal Representative or visit
www.fastenal.com to locate your
nearest store
Jack will not lower after unloading • Reservoir overfilled
• Linkages binding
• 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, reinstall oil filler plug
Will not lift to full extension
• Fluid level low
• Ensure proper fluid level
Lubrication
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.
cleaning
Periodically check the pump piston and ram plunger for signs of rust or corrosion. Clean as needed and wipe with
an oily cloth.
Storage
When not in use, store the jack with pump piston and ram plunger fully retracted.
