Engine O-ring 320/01656 JCB, aftermarket

For the JCB machines: engine O-ring 320/01656, an aftermarket part.

A ring is defined by inside diameter, cross-section and material, and even rings that look alike can differ in hardness or material. In hydraulic and fuel systems a ring of the wrong material swells or cracks, and in high-pressure joints a size mismatch lets the ring extrude from its groove. The ring is therefore chosen by part number.

Specifications

Compatibility

According to the product card, 320/01656 is an engine O-ring. Fit is confirmed by the part number. The catalogue also has the genuine version of this part. Other parts are in Seals and oil seals.

Fitting

On assembly, clean the groove and mating face, wet the ring with the working fluid or suitable grease and seat it without twisting. Protect the ring as it passes sharp edges and threads, tighten the joint to the specified torque and check for leaks under pressure. Spare rings are stored somewhere cool and dark, since rubber in sunlight cracks at the surface. Before fitting, inspect the ring for cracks and cuts.