User Manual

Preventive Maintenance
IMPORTANT: The greatest single cause of failure in hydraulic units is dirt. Keep the motorcycle/ATV 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. To check the oil level, completely retract the ram. Remove the plug from the oil filler hole. The oil level should be within
1/4" of the filler plug hole. If necessary, add approved anti-wear hydraulic jack oil (Mobile DTE #13 or equivalent), and
install the filler plug again. IMPORTANT: The use of alcohol, hydraulic brake fluid, detergent motor oil, or
transmission oil could damage the seals and result in jack failure.
4. 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
Erratic action 1. Air in system
1. Refer to section titled “Bleeding Air from the
2. Oil viscosity too high
2. Change to a lower viscosity oil.
3. Internal leakage in cylinder
3. Replace worn packings. Look for
excessive contamination or wear.
4. Cylinder sticking or binding
Look for dirt, gummy deposits, leaks,
misalignment, worn parts, defective packings.
Jack does not lift 1. Release valve is open
1. Close release valve.
2. Low/no oil in reservoir
2. Fill with oil and bleed system.
3. Air-locked system
3. Bleed system.
4. Load is above capacity of jack
4. Use correct equipment.
5. Delivery valve and/or bypass
5. Clean to remove dirt or foreign matter.
valve not working correctly
Replace oil.
6. Packing worn out or defective
6. Repair power unit.
Jack lifts only partially 1. Too much or not enough oil
1. Check oil level.
Jack advances slowly 1. Pump not working correctly
1. Repair power unit.
2. Leaking seals
2. Repair power unit or seals.
Jack lifts load, but doesn’t hold 1. Cylinder packing is leaking
1. Repair power unit or seals.
2. Valve not working correctly (suction,
2. Inspect valves. Clean and repair seat
delivery, release, or bypass)
3. Air-locked system
3. Bleed system.
Jack leaks oil 1. Worn or damaged seals
1. Repair power unit or seals.
Jack will not retract 1. Release valve is closed
1. Open or clean release valve.
2. Locking bar engaged
2. Raise jack slightly, disengage locking bar.
Jack retracts slowly 1. Cylinder damaged internally
1. Send jack to OTC authorized service center
for repair.
2. Link section is binding
2. Lubricate link section.
Parts List & Operating Instructions Form No. 520825, Sheet 3 of 3, Back