Hydraulic Fan Motor Assembly - Part Numbers 708-7W-00230 & 708-7W-00210 This hydraulic fan motor assembly is designed for use on Komatsu HM400-3 and HM400-5 series articulated dump trucks, providing reliable cooling system performance. Common Faults Insufficient output torque of fan motor, low fan speed and engine overheating Abnormal noise during fan motor operation with housing vibration Oil leakage at motor shaft end, damaged oil seals and gaskets Wear of internal plungers