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6
TROUBLESHOOTING
Possible Causes
Corrective Action
Jack will not lift load
Jack bleeds off after lift
Will not lift to full extension
• Release valve not tightly closed
• Overload condition
• Fluid level low
• Fluid level low
• Air trapped in system
• Release valve not tightly closed
• Overload condition
• Hydraulic unit malfunction
• Ensure release valve tightly closed
• Remedy overload condition
• Ensure release valve tightly closed
• Remedy overload condition
• Contact Blackhawk Tech. Service
• Ensure proper fluid level
• Ensure proper fluid level
• With ram fully retracted, remove oil filler
plug to let pressurized air escape, then
reinstall oil filler plug
Poor lift performance
Jack will not lower after unloading
• Reservoir overfilled • Drain fluid to proper level
Symptom