12. COOLING SYSTEM MXU 250R/300R Snap Ring Inner Bearing Washer Impeller Remove the water pump shaft outer bearing. Water Pump Shaft Outer Bearing Seal Washer Water Pump Assembly MECHANICAL SEAL REPLACEMENT Drive the mechanical seal out of the water pump assembly from the inside. Mechanical Seal (Water Seal) 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. 12-11