Caterpillar 0996444 Hydraulic Pump Coupling Assembly

The 0996444 hydraulic pump coupling is a flexible drive component designed to connect the hydraulic pump shaft to the engine flywheel on Caterpillar mini excavators. It transmits rotational power while absorbing torsional vibration and shock loads between the engine and pump. Engineered for the Caterpillar C2.6 diesel engine and compatible Mitsubishi 4M40 and 4D32 engines, this coupling assembly features a 14-tooth spline interface and a 215 mm by 118 mm dimensional envelope. The flexible rubber element provides misalignment tolerance and dampens harmonic vibration inherent in hydraulic drive systems. Direct replacement for Caterpillar OEM part numbers 099-6444 and 0996444, also cross-referenced to 1099248.