Preventive Maintenance; Troubleshooting Guide - SPX OTC 1794 Lista De Piezas E Instrucciones De Funcionamiento

Parts List & Operating Instructions
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
b. Excessive wear, bending, or other damage
c. Leaking hydraulic fluid
Repair procedures must be performed in a dirt free environment by qualified personnel who are familiar with
this equipment.
Trouble
Air Stage - Air leak causes
mechanical lock to engage, or
erratic cylinder action
Air Stage - Cylinder does not
lower when DOWN pedal is
pressed
Hydraulic Stage - Cylinder does
not raise
Hydraulic Stage - Cylinder lifts
load, but doesn't hold
Hydraulic Stage - Cylinder does
not raise to full height
Regularly lubricate all moving parts of the jack. Pay special attention to the lift screw and related linkages.
1. Use a medium weight lubricating grease on external moving parts, such as bearing surfaces, pivot points, and tilt screws.
2. Regularly check the oil level. With the saddle fully lowered, remove the oil filter screw, and check the oil level. For units
with the filter screw in the reservoir tube, oil should just cover the inner cylinder tube. For units with the filter screw at
the rear of the unit block, the oil level should be at the bottom of the filter screw holes. Fill, if necessary.
3. Use only hydraulic jack oil. Do not use hydraulic brake fluid.
4. If the jack fails to operate, check the oil level and/or bleed the unit before seeking repair service.
IMPORTANT: Do not use this jack as a wash rack when washing or steam cleaning transmissions.
© SPX Corporation

Preventive Maintenance

Troubleshooting Guide

Cause
1. Air valve is dirty
1. Mechanical lock is engaged
1. Jack is out of prime
1. Release valve is not sealing
2. System oil is dirty
1. Low oil level
Maintenance
Form No. 106458
d. Scored or damaged piston rod
e. Loose hardware
f. Modified or altered equipment
1. Clean air valve.
1. Attach air hose, and press UP
pedal until cylinder is at full line
pressure. Press DOWN pedal and
mechanical lock should release.
1. Refer to Bleeding Air from the
Hydraulic System.
1. Clean or reseat release valve ball.
2. Replace hydraulic oil.
1. Refer to Maintenance for
instructions about adding oil.
Sheet No.
Issue Date: Rev. E, 5-21-04
Solution
3 of 3