Tronair 02-7835C0100, Operation & Service Manual

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Model: 02-7835C0100
25 Ton Axle Jack
08/2010 | Rev. 01 Page | 2
6.0 MAINTENANCE
6.1 GENERAL

All maintenance and/or repair work should be done using good workmanship practices and proper tools.

The work area should be clean and free of dirt.

When O-rings and backup rings are removed, every effort should be made to avoid the contact of tools with the critical
surfaces of parts. Surface deformities could cause degradation of seals and failure.

It is good practice to replace all O-rings and backup rings once removed. Cut and damaged rings normally result in fluid
leakage and jack failure.

At this time flush old hydraulic fluid and dirt from overall system and replenish with new, clean hydraulic fluid.
6.2
SERVICING JACK
To Disassemble Jack:
1. Collapse jack ram.
2. Remove vent screw and drain all fluid from reservoir.
3. Remove cap screws surrounding jack cylinder, then remove flange.
4. Lift cylinder from jack base (Operate jack hand pump to help remove cylinder).
5. Push piston assembly through bottom of cylinder.
6. Unscrew piston end caps.
7. Remove all old seals and O-rings and replace with new ones.
To Re-Assemble Jack
1. Re-assemble in reverse order of above.
2. Use Loctite 545 on threads of piston end caps.
3. Pre-lube all O-rings and seals with new, clean MIL-PRF-5606 hydraulic fluid.
4. Torque each cap screw to 50-55 ft-lb.
6.3
REMOVING AND SERVICING PUMP
NOTE: If pump is found faulty, call the factory for replacement or replace seals as follows:
1. Review Appendix I
– HC-2515 Hand Pump Parts List.
2. Drain all fluid from reservoir.
3. Remove pump from jack.
4. Remove cotter pin from clevis pin.
5. Remove four (4) socket head cap screws.
6. Remove flanges.
7. Remove tube assembly.
8. Replace O-rings and backup ring. (See Appendix I
– HC-2515 Hand Pump Parts List for kits available).
9. Re-assemble in reverse order.
10. Torque each 3/8 inch socket head cap screw to 20-25 ft-lbs. Torque each ½ inch socket head cap screw to 6-7½ ft-lbs.
6.4
JACK FUNCTION LOAD TEST
1. Take all necessary precautions to prevent injury.
2. Always jack against a load and never against the jack itself.
3. Do not exceed a test load equal to the jack rated capacity plus 10%.
4. Test annually.