Axle shaft needle bearing 917/50200 JCB 3CX/4CX, aftermarket, option 1

For the JCB 3CX and 4CX backhoe loaders: axle shaft needle bearing 917/50200, an aftermarket part. This bearing is the needle roller bearing of the axle shaft.

Signs of axle bearing wear are a whine or hum that grows under load or at idle, play felt at the wheel or flange, the axle casing running hotter than usual and oil leaking past the seals. Bearing life depends largely on the cleanliness and level of the axle oil, since water-contaminated or low oil causes pitting on the roller and ring surfaces. The axle oil is changed with the type and at the interval the maker specifies.

Specifications

Compatibility

According to sources, 917/50200 is an NK45/30 needle roller bearing (45 x 55 x 30 mm), used in the axle shafts of JCB 3CX and 4CX backhoe loaders and included in front axle shaft repair kits. The catalogue also has the aftermarket version (option 2), aftermarket version (option 3), aftermarket version (option 4) and genuine version of this part. Other parts are in Bearings.

Fitting

The bearing is changed in clean conditions; take the new bearing out of its packaging only at fitting and do not wipe off the protective oil. Press it into its housing or onto its shaft only with a suitable driver and only through the ring that has the interference fit; the rollers and cage must never be struck. On taper roller bearings the cone and the cup are replaced together. After fitting, set the bearing preload or clearance by the method in the machine's service manual and top up the axle oil to the specified level.