5
TROUBLESHOOTING
Symptom
Possible Causes
Corrective Action
Jack will not lift load
• Release valve not tightly closed
• Overload condition
• Air pressure inadequate
• Ensure release valve tightly closed
• Remedy overload condition
•
Ensure adequate air pressure
Jack will lift, but not maintain
pressure
•
Release valve not tightly closed
• Hydraulic unit malfunction
•
Ensure release valve tightly closed
• Discontinue use, contact Mac Tools
technical service
Jack will not lower after unloading • Reservoir overfilled
• Linkages binding
• Fluid level low
• Drain fluid to proper level
• Clean and lubricate moving parts
• Ensure proper fluid level
Poor lift performance
• Fluid level low
•
Air trapped in system
• Ensure proper fluid level
•
With ram fully retracted, remove oil
filler screw to let pressurized air
escape. Reinstall oil filler screw
Will not lift to full extension
• Fluid level low
• Ensure proper fluid level
MAINTENANCE
Lubrication
A periodic coating of light lubricating oil to pivot points, axles and hinges will help to prevent rust and assure that
wheels, casters and pump assemblies move freely. To help ensure trouble free operation, an inline air dryer and
oiler is recommended.
Cleaning
Periodically check the pump piston and ram for signs of rust or corrosion. Clean as needed and wipe with an oily
cloth.
Note:
Never use sandpaper or abrasive material on these surfaces!
Storage
When not in use, store the jack with saddle fully lowered.
REPLACEMENT PARTS
(refer to page 6)
Not all components of the jack are replacement items. When ordering parts, give Model number, serial number and
parts description. Call or write for current pricing:
MAC Tools (a division of Stanley Black & Decker), 505 N. Cleveland
Ave., Suite 200, Westerville, OH 43082 Tel: 1800-MAC-TOOL (622-8665)
