Big-end bearing set 02/202916 Perkins +0.25 mm, aftermarket

Big-end bearing set 02/202916, +0.25 mm is an aftermarket part for the Perkins 1000 and 1100 series engines. The card also lists U5ME0034A, 332/G8430, 10000-45329.

Big-end bearings are the thin shells on which the connecting rod runs on the crankpin, carried by a pressurised oil film. The set holds the upper and lower shells for four rods. A worn bearing lowers oil pressure and causes knocking under load and a spun bearing. The size follows the crankpin: standard for a shaft that has not been reground, undersize for a reground one. The shell size is marked on the back of each shell, showing standard or the undersize value.

Specifications

Compatibility

The part is listed for JCB machines fitted with these engines. An undersize set is chosen after the crankshaft has been reground, to the journal size given by the grinding shop. The catalogue also has the genuine version of this part. Other parts are in Perkins engine.

Fitting

The shells go in oiled, with their backs dry and clean. The rod cap must not be turned round: the numbers on cap and rod face the same side. Change the engine oil and filter after assembly and watch the oil pressure on first start.