Pinion bearing 907/09000 JCB 3CX/4CX, aftermarket, option 1

Pinion bearing 907/09000 is an aftermarket part for the JCB 3CX and 4CX backhoe loaders. This bearing is the taper roller bearing supporting the pinion.

In construction machine axles the bearings support the gears and shafts and carry both radial and axial loads. On backhoe loaders and telehandlers the axle works hard, with bucket loads, shocks from rough ground and frequent changes of direction, and the bearings must carry these loads without upsetting the gear mesh. A worn bearing changes the gear clearances, causes whine and heat and in time damages the gears and seals, so it is replaced at the first signs of wear.

Specifications

Compatibility

According to sources, 907/09000 is an HM803149/HM803110 taper roller pinion bearing used on JCB 2CX, 3CX, 4CX and 5CX backhoe loaders. The catalogue also has the aftermarket version (option 2), aftermarket version (option 3) and aftermarket version (option 4) of this part. Other parts are in Bearings.

Fitting

When the old bearing is removed, check the housing and shaft seat for burrs, rust and wear, since a worn seat lets the new bearing spin. Renew the seals and O-rings next to the bearing too. When the axle oil is drained, look at the metal particles in it: a lot of particles suggests the gears may also be worn.