Connecting rod 320/03328 JCB Dieselmax, genuine

Connecting rod 320/03328 is a genuine JCB part for the JCB Dieselmax 444 engine. The card also lists 320/03377.

The connecting rod links the piston to the crankshaft and turns combustion force into rotation. The small end holds the gudgeon pin bush and the big end has a split cap and the big-end bearings. A bent rod lowers compression and knocks in the cylinder, while a damaged big-end bore leads to spun bearings; after a spun bearing the rod must always be checked. When selecting, compare the part number and the casting marks on the old rod. When a rod is replaced, the big-end bearings and rod bolts are renewed as well. The engine has four rods, and each is numbered and fitted to its own cylinder. The part number is marked on the rod body. The rod is forged steel. Cap and body are machined together. The rod is supplied new. Compare the rod weight with the others.

Specifications

Compatibility

The part is listed for JCB 3CX and 4CX backhoe loaders. The catalogue also has the aftermarket version of this part. Other parts are in JCB Dieselmax engine.

Fitting

Fit the cap to its own rod by the marks, with the numbers on cap and rod on the same side. After assembly, turn the crankshaft by hand to check that it rotates freely. Renew the rod nuts or bolts. Fit the rods in order and by their marks.