Table of Contents
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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.
NOTICE: Do not use sandpaper or abrasive material on ram or pump piston surfaces.
Storage
When not in use, store the jack with pump piston and Ram Plunger fully retracted and air supply disconnected.
TROUBLESHOOTING
Symptom
Jack will not lift load
Jack will lift, but not maintain
pressure
Jack will not lower after
unloading
Poor lift performance
Will not lift to full extension
Possible Causes
• Release Valve not tightly closed
• Overload condition
• Release Valve not tightly closed
• Hydraulic unit malfunction
• Reservoir overfilled
• Fluid level low
• Air trapped in system
• Fluid level low
5
Corrective Action
• Ensure Release Valve tightly
closed
• Remedy overload condition
• Ensure Release Valve tightly
closed
• Contact Mac Tools Tech. Service
• Ensure load is removed, then drain
fluid to proper level
• Ensure proper fluid level
• Follow Bleeding/Venting Trapped
Air procedure on page 3
• Ensure proper fluid level
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