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Parts List & Operating Instructions
IMPORTANT: Dirt is the greatest single cause of failure in hydraulic units.
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 in a well-protected area where it will not be exposed to corrosive
vapors, abrasive dust, or any other harmful elements.
2. Refer to Figure 2, and regularly (at least once per month) lubricate the moving
parts shown.
3. Add grease to upper arm grease nipple (shown) every three months.
4. Replace the oil in the reservoir at least once per year. To check the oil level,
place the service jack on level ground and lower the lift arm completely.
Remove the filler plug located under the top shroud. The oil level should be
within 3/8" of the filler plug hole. If necessary, add approved anti-wear
hydraulic jack oil, 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.
5. Inspect the jack before each use. Take corrective action if any of the following problems are found:
a. Cracked or damaged housing
b. Excessive wear, bending, or other damage
c. Leaking hydraulic fluid
d. Scored or damaged piston rod
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
© 2003 SPX Corporation
Preventive Maintenance
e. Malfunctioning swivel heads or adjusting screws
f. Loose hardware
g. Modified or altered equipment
Troubleshooting Guide
Cause
1.
Release valve is open.
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.
Packing 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, or
bypass).
3.
Air-locked system.
1.
Worn or damaged seals.
1.
Release valve is closed.
1.
Cylinder damaged internally.
2.
Link section is binding.
Form No. 520770
Grease Nipple
Solution
1. Close release valve.
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 seal kit.
1. Check oil level.
1. Install seal kit, or replace power unit.
2. Install seal kit.
1. Install seal kit.
2. Inspect valves. Clean and
repair seat surfaces.
3. Bleed system.
1. Install seal kit.
1. Open or clean release valve.
1. Send jack to OTC authorized
service center for repair.
2. Lubricate link section.
3 of 3
Sheet No.
Issue Date:
Rev. C, 8-13-03
Figure 2
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