12. COOLING SYSTEM GRAND DINK 125/150 Water Pump Assembly MECHANICAL SEAL REPLACEMENT Drive the mechanical seal out of the water pump assembly from the inside. Mechanical Seal (Water Seal) Mechanical Seal Driver Drive in a new mechanical seal using a mechanical seal driver. Apply sealant to the right crankcase cover fitting surface of a new mechanical seal and then drive in the mechanical seal. Outer Bearing WATER PUMP SHAFT INSTALLATION Drive a new water pump shaft outer bearing into the water pump assembly from the inside. Water Pump Assembly 12-12