Welcome to the engines category of our JCB Spare Parts Compendium. Here you will find information about the various parts to a JCB engine, complete with links to relevant parts in our directory. This is currently being built (writing 21 March 2017). In other areas of the site, you can find engines and short engines listed on our parts selection for JCB Engines and a full listing of engines and their constituent parts, that are currently listed in our directory, in the Engine Parts Category. Please be sure to contact us for any part that you need.
JCB engines are some of the top diesel engines you can buy. They are made for construction machines, as well as various lorries.
Also known as the cylinder block, this cast iron or aluminium piece forms a substantial amount of the engine.
Located just above the cylinders on top of the engine block, the cylinder head completes the body provided by the block.
The cylinder liner is synonymous with cylinder sleeve. Not all engine models have it, but it's important in those that do.
The crankshaft, commonly called the "crank," is arguably the most important part of the engine. It's located towards the lower end, and is positioned horizontally.
The crankshaft pulley, most commonly known as the harmonic balancer, is connected to the crankshaft to reduce torsional vibration, which is the angular vibration of an object, and pulls the drive belts.
The pistons are connected directly to the crank. However, "piston" is a general term for its constituent parts, which are the piston head, piston rings, and the connecting rod (con rod).
The oil pump is typically located below the crankshaft, it concentrates pressurised oil into circulation throughout the engine, lubricating the bearings, the pistons, the camshaft, and more. The engine needs the lubrication of oil in order to maintain the right temperature and to function with ease and minimal noise.