12. COOLING SYSTEM ATV 300/250
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
Install the water pump shaft and shaft inner
bearing into the waster pump assembly.
Install the snap ring to secure the inner
bearing properly.
Install the dowel pins and a new gasket and
then install the water pump assembly to the
right crankcase cover.
Tighten the twelve 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/IMPELLER
INSTALLATION
When the mechanical seal is replaced, a
new seal washer must be installed to the
impeller.
Install the impeller onto the water pump
shaft.
Torque: 1.2 kgf-m (12 N-m, 8.6 lbf-ft)
The impeller has left hand threads.
Install the two dowel pins and a new gasket.
Install the water pump cover and tighten the
four bolts.
Torque: 1 kgf-m (10 N-m, 7.2 lbf-ft)
12-9
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