Excavator Komatsu PC1250-8 Fan Motor – Part Nos. 708-7S-00610 708-7S-00612 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 and valve plate, severe overheating of motor Unstable motor pressure, fluctuating fan speed Motor seizure, fan stops rotating and cooling system fails