Main pump coupling JRJ0213 JCB JS, aftermarket

Main pump coupling JRJ0213 is an aftermarket part for the JCB JS crawler excavators. This coupling comes complete with the rubber element and splined hub.

The rubber coupling element is the flexible ring that transmits torque from the flange on the engine flywheel to the hydraulic pump hub. Steel bushes bonded between rubber segments are bolted alternately to the flywheel and to the pump hub. The rubber damps the torsional vibration of the diesel engine and protects the pump from shock loads. Ageing rubber cracks, separates from the bushes or swells with oil; a worn element knocks and eventually tears. Keep the rubber element away from oil and fuel leaks, as oil makes the rubber swell and soften.

Specifications

Compatibility

According to sources, JRJ0213 is the main pump coupling of JCB JS200, JS210, JS220, JS225, JS230, JS240 and JS260 excavators with the K3V112DT pump. Other parts are in Hydraulic pumps.

Fitting

For the change, separate the pump from the engine and check the hubs on the flywheel and pump shaft and the bolt holes. Fit the element, tighten the bolts with thread locker to the specified torque, and keep the misalignment between pump and engine within the maker's limits. After assembly, run the engine at idle and check for knocking and vibration. Always inspect the coupling element whenever the pump is separated from the engine.