Crankshaft 02/201287 Perkins AK, aftermarket

Crankshaft 02/201287 is an aftermarket part for the Perkins 1000 series (AK) engine. The card also lists ZZ90238, 10000-47898.

The crankshaft turns the reciprocating motion of the pistons into rotation and passes torque to the flywheel, front pulley and gear train. In a four-cylinder engine it runs on five main journals, with the rods on four crankpins. Scored or oval journals, a spun bearing, low oil pressure and knocking under load call for regrinding or replacement. A cracked or bent shaft can only be replaced. The photo shows a shaft with four crankpins and five main journals. Oil passages drilled through the crankshaft carry oil from the main journals to the crankpins; swarf or dirt in them soon ruins the bearings. If the repair followed a spun bearing, the block oil passages, oil cooler and oil pump are also cleaned or replaced, or metal particles will reach the new shaft and bearings. The front end carries the pulley and gear, the rear end the flywheel flange.

Specifications

Compatibility

The part is listed for JCB backhoe loaders with Perkins engines. In the Perkins catalogue ZZ90238 is the crankshaft kit for the 4.236 and 1000 series engines such as the 1004-4, 1004-40 and 1004-40T. The catalogue also has the genuine version of this part. Other parts are in Perkins engine.

Fitting

Coat the journals with assembly lube; once the shaft is in place, turn it by hand to check it rotates freely. Line up the gears by their timing marks.