12. COOLING SYSTEM GRAND DINK 250 Install the water pump shaft and shaft inner Snap Ring Water Pump Shaft bearing into the waster pump assembly. Install the snap ring to secure the inner bearing properly. Inner Bearing Bolts Install the dowel pins and a new gasket and then install the water pump assembly to the right crankcase cover. Tighten the eight bolts to secure the right crankcase cover. When installing the water pump assembly, aligning the groove on the water pump shaft with the tab on the oil pump shaft. Water Pump Assembly Mechanical Seal WATER PUMP/IMPELLER INSTALLATION When the mechanical seal is replaced, a new seal washer must be installed to the impeller. Impeller Seal Washer (Porcelain) 12-13