Bush 1211/0021 JCB, aftermarket

For the JCB machines: bush 1211/0021, an aftermarket part. According to the product card, this part is a bush.

A pivot bush is a replaceable plain bearing pressed into the eyes of the boom, dipper, bucket and hydraulic cylinders, in which the pin turns. The bush protects the pin and the eye itself from wear: the wear is taken by the bush, and once it is replaced the joint works tightly again. A grease passage and grooves spread grease over the pin surface. When the bush wears, play develops in the joint, the bucket and dipper knock as they move, precision is lost and, if the repair is put off, the eye becomes oval and has to be rebuilt by welding. Bush wear is detected from the play in the joints by gently rocking the dipper with the bucket pressed against the ground.

Specifications

Compatibility

According to the product card, the part number is 1211/0021. Fit is confirmed by the part number and the machine serial number. The catalogue also has the genuine version of this part. Other parts are in JCB JS series bushings.

Fitting

Remove the old bush with a puller or press, clean the eye and remove any burrs. Lightly oil the new bush and press it in square to the axis, then fit the pin and grease the joint.