Cat 312 hydrqulic rotation hub? Rotary manifold rebuild question..

[mclean]

I've had this 312a for a couple months. Never worked too hard just around the shop or loading stuff onsite. The tracks have been week since I bought it. Won't turn with out the help of the boom and spin..

I took out the rotary hub this morning, and there are no seals in the lower 5 grooves. How could this have happened? Would someone take them out and reinstall with out to cover a problem?

Any thoughts? Just put the new seals in and see what happens?



Thanks,
Chris

 

[lantraxco]

Check the hydraulic tank, probably lots of small pieces laying in the bottom, and/or the return filter, cooler, etc.