I have an IMT mechanics truck. It has developed slop between the worn drive and slewing ring but only in the area that it is most frequently used, on the right rear corner. It has been greased regularly. It is continus rotate but does not have a swivel, so the crane is always parked anti-clock. I plan to relocate the slewing ring to a clock toward drivers seat . The slewing ring had lots of grease on it except the one area and it was dry. From now on every time it comes off park will get a full rotation . Lesson Learned.
This is the corner. It has seen heavy use this summer.