Caterpillar 0963973 Rubber Coupling Assembly

The 096-3973 rubber coupling assembly serves as a flexible power transmission element between the engine flywheel and hydraulic pump drive on Caterpillar excavators. Constructed with a rubber element featuring 12 teeth bonded to steel hubs, it accommodates misalignment and dampens torsional vibration from the diesel engine. Compatible with Caterpillar 3204, 3304, and 3116 industrial diesel engines as well as Mitsubishi S6KT engine variants. Directly mounts to the engine flywheel housing and transmits torque to the hydraulic pump input shaft. Designed for heavy-duty construction equipment operating cycles. Cross-references include Caterpillar part numbers 096-3973, 0963973, and CA0963973. Related supersession or alternative part 0941466 fits similar E-series excavator applications. Aftermarket replacements available from multiple global suppliers.