Backhoe kingpost 128/E5496 JCB 3CX/4CX, genuine

Backhoe kingpost 128/E5496 is a genuine JCB part for the JCB 3CX and 4CX backhoe loaders. According to the product card, this part is a backhoe kingpost.

The kingpost (swing tower) connects the backhoe boom to the carriage and is the joint around which the boom swings left and right. It is attached to the carriage by the upper and lower swing pins and to the boom by the boom foot pin, and the swing rams act on it. Digging forces and swing moments pass straight through the kingpost, so worn pin eyes, cracked welds or a distorted body make the boom wobble and lose precision. The swing pin nipples are greased every day. The kingpost pin eyes are measured, as oval eyes leave play even with new pins and bushes. Fine cracks at the welds show as rust marks under the paint, so the kingpost is inspected after cleaning.

Specifications

Compatibility

According to the product card, the part number is 128/E5496. The card also lists 331/49744, 128/10726, 123/10855. Fit is confirmed by the part number and the machine serial number. The catalogue also has the aftermarket version of this part. Other parts are in Backhoe arm.

Fitting

Large structural parts are fitted with suitable lifting equipment, with the machine made safe and the attachments lowered to the ground. Pins and bushes are cleaned and greased, and bolts tightened to the specified torque. After assembly the movement is tried slowly through its full travel to check that nothing binds.