Axle shaft needle bearing 917/50200 JCB 3CX/4CX, aftermarket, option 2

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

The bearing is chosen by part number and standard bearing designation, since a bearing with the same outer dimensions but a different load rating or contact angle upsets the axle setting. Preload matters on taper roller bearings: too much preload overheats the bearing and shortens its life, while too little leaves play and shock in the gear mesh. After a bearing change the setting is therefore made with measurements, renewing the shims if necessary.

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 1), 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.