As investigation result, this water pump was found trace of leakage in drain hole and leakage test was leakage. The bearing was found unsmooth of rotation, rusty on shaft and found grease leakage. Seal ring was found wear and had foreign material to adhere on surface of seal ring / matting ring yet found than matting ring it was cracked two point to be abnormal that might occurred by contamination in water into stick between on contact surface of seal cause by seal leakage and water into bearing effect the bearing damage. For impeller water pump was found rusty which might occurred by LLC was not applied.
However, This bearing is needed more of investigation to find the failure of bearing by TBKK’s supplier.