I have a leak in my turret when I pump only off the drivers side of my pump. I am assuming my slewing seal is broken. My mec says it is no big deal and he could do both in a day. Has anyone done this repair before? I am a bit reluctant to step up to the plate for this one.

You can do it Seed , if I and another operator has done it you can to ! We talking of R&P slewing ?

Seed it could be a couple of things but they are not that bad make sure you put spray teflon or some kind of coating on the outside of the barrel for future repairs if not they will corrode and be a real pain to pull out, be careful not to scar your facing on the rack can cause major issues.