TROUBLE SHOOTING
Symptom
Jack will not
load
Jack bleeds
off after lift
Jack will not
lower after
unloading
Poor lift
performance
Will not lift to
full extension
Possible Causes
Release valve not tightly
closed overload condition
Air supply in adequate
Release valve not tightly
closed Overload condition
Hydraulic unit malfunction
Reservoir overfilled
Linkages binding
Fluid level low
Air trapped in system
Fluid level low
Corrective Action
Ensure release valve tightly closed
Remedy overload condition
Ensure adequate air supply
Ensure release valve tightly closed
Remedy overload condition
Contact seller
Drain fluid to proper level
Clean and lubricate moving parts
Ensure proper fluid level
With ram fully retracted, remove oil
filler plug to let pressurized air
escape, reinstall oil filler plug
Ensure proper fluid level
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