Tronair Columbus Jack 2295-10PR, Operation & Service Manual, Page: 32 / 34

Routine Jack Maintenance Bulletin
TO PROVIDE COMPLETE INFORMATION ON SERVICING
ColumbusJACK/REGENT QUALITY GROUND HANDLING EQUIPMENT
BULLETIN RJM 149
– TEFLON BACKUP RING INSTALLATION PROCEDURE
When installing new Teflon backup rings on a ram or piston of any jack model, the following procedure should be observed to
ensure correct installation of the ring. When installing a new backup ring, the corresponding o-ring should always be replaced
also.
1. Cut existing o-ring and Teflon backup ring.
2. Clean and visually inspect the groove in the ram or piston for any nicks, scratches of score marks, which could cut the
o-ring and backup ring during installation.
3. Check to ensure backup ring is clean and not damaged.
4. Set backup ring on a flat metal surface.
5. Using a propane torch, heat backup ring in a circular motion until backup ring is equally softened and pliable or flexible.
6. Carefully pick-up the
HOT Teflon backup ring off the HOT metal plate and
stretch the ring enough to fit over the end of the ram (piston).
NOTE: Make sure the "V" cup portion of the backup ring will face the o-ring.
(See figure)
7. If backup ring does not return to size after cooling, re-heat backup ring while
on the part, and cool quickly with a cold, wet towel or rag.
8. Check to ensure o-ring is clean and not damaged.
9. Carefully stretch o-ring over the end of the ram (piston). Ensure that the
o-ring and the "V" cup of the backup ring are facing each other. (See figure)