Preventive Maintenance; Troubleshooting Guide - SPX OTC 1737 Parts List And Operating Instructions

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 in a protected area where it will not be exposed to corrosive vapors, abrasive dust, or other harmful elements.
2. Regularly lubricate the moving parts in the wheels, arm, and handle.
3. Replace the oil in the reservoir at least once per year. To check the oil level, lower the lift arm completely. Remove the phillips hd.
oil screw. Oil level should be at the bottom of the filler screw hole. If necessary, add approved anti-wear hydraulic jack oil, and install
the filler plug. IMPORTANT: Alcohol, hydraulic brake fluid, 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, damaged housing
b. excessive wear, bending, other damage
5. Keep warning labels and instructional decals clean and readable. Use a mild soap solution to wash external surfaces of the jack.
Repair procedures must be performed in a dirt-free environment by qualified personnel who are familiar with this equipment. CAUTION:
All inspection, maintenance, and repair procedures must be performed when the jack is free of a load (not in use).
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

c. leaking hydraulic fluid
d. scored, damaged piston rod

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. 521457
e. loose hardware
f. modified equipment
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. Replace hydraulic unit.
1. Check oil level.
1. Replace hydraulic unit.
2. Replace seals. Seal Kit No. 521475 is
available from OTC.
1. Replace hydraulic unit.
2. Inspect valves. Clean and repair seat
surfaces.
3. Bleed system.
1. Replace hydraulic unit.
1. Open release valve all the way
counterclockwise (CCW). May be
necessary to clean release valve.
1. Send jack to OTC-authorized service
center. (Refer to OTC Form No. 104031.)
2. Lubricate or replace link section.
Sheet No. 4 of 4
Issue Date: 8-05-2003 Rev. B