Needle bearing (transmission) 917/02400 JCB, aftermarket, option 2

Needle bearing (transmission) 917/02400 is an aftermarket part for the JCB machines.

A needle bearing is made up of many thin cylindrical rollers (needles) and carries high loads in a small radial height. In transmissions it sits under gears that turn freely on the shaft, in clutch drums and in gear hubs; in the caged type the needles are held evenly spaced in a cage. Axial (thrust) needle bearings carry the axial force on the side of a gear. A worn needle bearing lets the gear rock and causes noise and early tooth wear. A whine from the gearbox heard only in certain gears often points to a worn needle bearing under that gear's free-running gear. Caught early, replacing just the bearing can save the gear and shaft. When the gearbox is cleaned after a failure, the oil passages are checked too, as a blocked lubrication hole leaves the bearing without oil.

Specifications

Compatibility

According to the product card, 917/02400 is a needle bearing. Fit is confirmed by the part number. The catalogue also has the aftermarket version of this part. Other parts are in Transmission.

Fitting

On assembly, lubricate the needles and shaft with clean transmission oil, push the caged bearing onto the shaft without tilting and make sure no needles drop out as the gear goes on. Fit thrust bearings in the right order together with their washers. After assembly, check the shaft end float, fill with the specified oil and listen to the gearbox on the first run. To stop the needles falling out during assembly, the bearing can be held lightly with clean grease, which dissolves in the oil on the first run.