Service manual
Page 110 of 151
• Upon installation, inspect for any leaks.
12-7 Water Pump
Inspection
• Place a water pan underneath the unit.
• Remove the coolant drain bolt.
• Ensure all the coolant is drained from the cooling
system.
• Inspect the drained coolant for any unusual
material or dirt. If there is, the inner water pump
seals or cooling system may be damaged. The
cylinder or cylinder head gasket may also be
damaged; take apart the crankcase and inspect
these before dismantling the cooling system.
Water Pump Removal
• Loosen the drain bolt to drain out the coolant.
• Remove the water hose.
• Loosen the 4 bolts and remove the pump cover.
• Loosen the 9 bolts and remove the right cover.
• Remove the gasket and dowel pins.
• Turn the pump rotor clockwise and remove.
• Note that the rotor uses a left hand threads.
• Remove the cir clip from the right crankcase
cover.
• Remove the water pump shaft and the inner
bearing.
• Remove the outside bearing with an inner bearing
puller.
• Rotate the inner ring of the bearing; the bearing
should turn smoothly and quietly.
• If the bearing does not rotate smoothly or
produces a noise, replace it.
• Special tool: Inner bearing puller
Drain bolt
Water pump
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