Slew/swing creep

[Gumboot]

Hi, Gumboot here, (a Newbie)
Have just moved over to a Mini Ex. after 30yrs on JD loader-crawler.
Problem is with the house slowly rotating, more pronounced on a slope, to the lowest point of gravity. Will happen both clockwise, and counter-clockwise, engine on or off, hydraulics active or disabled.
Swing/slew in normal operation is fine, no leaks, odd noises, joystick will place the machine where desired, then slowly creep.
Manual on the swing motor doesn't show any brake pack, so am somewhat stumped. relief port valves are a possibility, but both ways?
Anyone had anything similar? thanks.

 

[Solar Oak]

I had the same issue with my Bobcat X331. My dealer said it was the poppets in the turntable.

The mechanic that repaired it, said the only complete repair was to replace the whole unit. Which is no longer available. At least not at a price I'd be willing to pay. He polished the poppets and replaced some seals. I'm not sure what that means, but I hope the information is of some help.