Slew Ring Grease

The slewing rings are essentially working in fatigue.

Slew ring grease. In slewing ring bearings a heavy duty extreme pressure grease is required. This video shows how i got access to the 360 degree slew gear ring on a jcb micro digger it was found to be lacking grease and covered in dirt i was the. New grease must be added before and after the machine has been shut down for a long time. Slewing bearing is normally used ep ii extreme pressure ii lithium ester.

In case of some slewing ring bearings fatigue may occur due to improper internal lubrication. Typically slewing ring bearings are used in excavators crane wind power turbine and other oscillating service. More than 96 of slewing ring failure could be avoided by following simple maintenance tips. Before deliver from the factory the slewing bearing is filled with a small amount of ep ii.

Fill in the slewing bearing grease. Watch his brief video and learn from jeff payne caterpillar maintenance expert how to maintain the swing bearing and swing gear on your cat hydraulic exca. Slewing bearing grease analysis. The grease must entirely cover the flanks of the pinion and of the ring gear whether applying by brush or spraying.

Pump grease into the bearing until you see old grease squeeze past the seal. When begin use it the user should fill into full new grease which could make sure the slewing bearing works in good function. Later fine cracks develop followed by flaking. When lubrication is inadequate surface damage in the form of roughening or waviness occurs.

Inadequate lubrication is the most common cause of premature bearing failures. Lubrication is especially important in the maintenance of slewing bearings. Consisting of rings mounted with threaded fasteners and usually having a gear integral with one of the rings. When filling grease slowly turn the slewing ring to make the grease fill evenly.