7
TROUBLESHOOTING
PROBLEM-SOLVING HINTS
FIG. 3
PARTS
MODEL NUMBER: 50138
The Model Number and Serial Number are found on the lifting arm and handle socket
respectively. Always mention the Model Number and Serial Number when requesting service
or repair parts for your jack.
INDIVIDUAL PARTS ARE NOT AVAILABLE FOR REPLACEMENT ASSMBLIES
1
2
3
4
5
6
7
Symptom
Possible Causes
Corrective Action
Jack does not lift load
Jack bleeds off
(starts to lower) after lift
Jack does not lower after
unloading
Poor lift performance
• Release valve not tightly closed
• Overloaded - too much weight on jack
• Release valve not tightly closed
• Hydraulic unit malfunction
• Oil reservoir overfilled
• Linkages binding
• Ensure release valve is tightly closed
• Reduce weight on jack
• Ensure release valve is tightly closed
• Replace power unit assembly
• Drain fluid to proper level
• Clean and lubricate moving parts
• Ensure proper fluid level
• With ram fully retracted, open release
valve, pump handle several times to
expel trapped air
Does not lift to full
extension
• Fluid level low
• Fluid level low
• Air trapped in system
• Ensure proper fluid level
Key
Description
1
Saddle
2
Power Unit Assembly
3
Handle Assembly
4
Front Wheel Assembly
5
Rear Castor Assembly
6
Cover Plate
7
Oil Filler Plug
—
Operators Manual
––
Warning Label
For after sale support and assistance:
Call 8:00 AM - 4:45 PM CST., Monday - Friday 1-888-332-6419
