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Parts List & Operating Instructions
IMPORTANT: The greatest single cause of failure in hydraulic units is dirt. Keep the service 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, with pistons completely retracted, in a well-protected area where it will not be exposed to corrosive vapors, abrasive
dust, or any other harmful elements.
2. Use only replacement parts that are approved by the manufacturer. Disconnect the air supply before performing any maintenance
operation.
3. Regularly lubricate the moving parts in the wheels, arm, and handle using a high quality grease.
4. To check the oil level, completely lower the pistons. Remove the dipstick. The oil level should be between the two marks on the
dipstick. If necessary, add approved, anti-wear, hydraulic jack oil, and install the dipstick again. IMPORTANT: The use of alcohol,
hydraulic brake fluid, or transmission oil could damage the seals and result in jack failure. Use only HL or HM type hydraulic
oil with an ISO viscosity grade of 22 or SAE viscosity grade of SW.
5. Replace the oil in the reservoir at least once per year: Disconnect the air supply; remove the
cover and connecting tube (see Figure 5); and let the oil drain into an approved container.
Attach the connecting tube; remove the dipstick; add approved, anti-wear, hydraulic jack oil;
check the oil level (between the two marks on the dipstick); install the dipstick and cover.
6. Inspect the jack before each use. Take corrective action if any of the following problems are found:
a. cracked, damaged housing
b. excessive wear, bending, other damage
7. Keep warning labels and instructional decals clean and readable. Use a mild soap solution to wash external surfaces of the jack.
CAUTION: To prevent personal injury, all inspection, maintenance, and repair procedures must be performed
when the jack is free of a load (not in use) and disconnected from the air supply. Repair procedures must be
performed in a dirt-free environment by qualified personnel who are familiar with this equipment.
Trouble
Jack does not lift
Jack lifts only partially
Jack advances slowly
Jack lifts load,
but doesn't hold
Jack leaks oil
Jack will not retract
Jack retracts slowly
2 of 2
Sheet
© 2006 SPX Corporation
Rev. A, September 29, 2006
Preventive Maintenance
c. leaking hydraulic fluid
d. scored, damaged piston rod
Troubleshooting Guide
Cause
1. Control valve in wrong position.
2. Low/no oil in reservoir.
3. Air-locked system.
4. Load is above capacity of jack.
5. Delivery valve and/or bypass valve not
working correctly.
6. Seals worn out or defective.
1. Too much or not enough oil.
1. Pump not working correctly.
2. Leaking seals.
1. Cylinder packing is leaking.
2. Valve not working correctly (suction,
delivery, release, bypass).
3. Air-locked system.
1. Worn or damaged seals.
1. Control valve in wrong position.
1. Cylinder damaged internally.
Form No. 539815
Connecting
Tube
e. loose hardware
f. modified equipment
Solution
1. Move control valve to UP position.
2. Fill with oil and bleed system.
3. Bleed system.
4. Use correct equipment.
5. Clean to remove dirt or foreign matter.
Replace oil.
6. Install appropriate seal kit.
1. Check oil level.
1. Install appropriate seal kit.
2. Install appropriate seal kit.
1. Replace with seal kit No. 540023.
2. Inspect valves. Clean and repair seat
surfaces.
3. Bleed system.
1. Replace with seal kit No. 540023.
1. Move control valve to DOWN position.
1. Send jack to OTC-authorized service
center. (Refer to OTC No. 104031.)
Figure 5
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