Arctic Cat 400 Service Manual page 393

6. Using an impact driver, loosen but do not
remove the two Phillips-head cover screws.
7. Remove the two cap screws securing the water
pump to the engine; then remove the water
pump.
DISASSEMBLING
1. Finish removing the two Phillips-head cap
screws securing the cover to the bearing hous-
ing; then remove the cover. Account for the
O-ring.
2. Remove the E-ring securing the impeller/shaft
to the bearing housing; then remove the impel-
ler/shaft.
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3. Using Seal Removal Tool (p/n 0644-072),
remove the mechanical seal and the oil seal from
the bearing housing.
CLEANING AND INSPECTING
NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is
necessary.
1. Clean all oil-pump components in cleaning sol-
vent.
2. Inspect the impeller/shaft for corrosion or dam-
age.
ASSEMBLING
1. Place the new oil seal into the bearing housing;
then using a seal driver, gently tap the seal down
until it is fully seated.
2. Place the new mechanical seal into the bearing
housing; then tap it down until it is fully seated.
NOTE: A large deep-well socket can be used to
drive the seal down evenly.
3. Install the impeller/shaft assembly into the bear-
ing housing; then secure with the E-ring.
NOTE: Make sure the E-ring is fully seated and
the impeller rotates freely.
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