Preventive Maintenance
IMPORTANT: The greatest single cause of failure in hydraulic units is dirt. Keep the transmission jack
clean and well lubricated to prevent foreign matter from entering the system. If the jack has been exposed to
rain, snow, sand, or grit, it must be cleaned before it is used.
1. Store the jack in a well-protected area where it will not be exposed to corrosive vapors, abrasive dust, or
any other harmful elements.
2. Lubricate moving parts at least once per month.
3. Regularly wipe the cylinder columns with a clean cloth to remove dirt and abrasives.
4. Replace the oil in the reservoir at least once per year.
5. Inspect the jack before each use. Take corrective action if any of the following problems are found:
a. Cracked or damaged housing d. Scored or damaged piston rod
b. Excessive wear, bending, or other damage e. Loose hardware
c. Leaking hydraulic fluid f. Modified or altered equipment
Troubleshooting Guide
Repair procedures must be performed in a dirt-free environment by qualified personnel who are familiar with
this equipment.
Trouble Cause Solution
Air Stage - Air leak causes 1. Air valve is dirty
1. Follow instructions to
mechanical lock to engage or
clean air valve.
erratic cylinder action
Air Stage - Cylinder does not 1. Mechanical lock is engaged
1. Attach air hose and
lower when DOWN pedal is
press UP pedal until
pressed
cylinder is at full line
pressure. Press DOWN
pedal and
mechanical
lock should release.
Hydraulic Stage - Cylinder does 1. Jack is out of prime
1. Follow instructions
not raise
on bleeding air from the
hydraulic system.
Hydraulic Stage - Cylinder lifts 1. Release valve is not sealing
1. Clean or reseat
load, but doesn’t hold
release valve ball.
2. System oil is dirty
2.
Replace hydraulic oil.
Hydraulic Stage - Cylinder does 1. Low oil level
1. Check oil level.
not raise to full height
Follow instructions
on adding oil.
Parts List & Operating Instructions
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