Arctic Cat 500 Sno Pro Operator's/Performance Manual page 53

2. Using the seal driver, position the inner water
pump shaft seal onto the seal driver and gently tap
the seal down into position.
NOTE: Grease must be applied to the lips of the
inner seal before installation.
NOTE: The seal must be installed with its spring
side towards the crankshaft.
3. Install the snap ring securing the inner seal in the
crankcase.
4. Using the seal driver, carefully install the outer
water pump seal. Gently tap the seal down into
position until it seats itself against its flange.
5. Position the upper crankcase half upside-down on
two wooden blocks; then install the C-ring, the
four bearing retaining pins, and the two crankcase
dowel pins.
6. Place the PTO-side crankshaft bearing into posi-
tion making sure the bearing retaining pin hole is
positioned inward.
NOTE: The bearing retaining pin hole is the hole
that doesn't go entirely through the bearing case.
MS986A
7. Lubricate the inner lips of the crankshaft oil seals
with grease; then slide the seals onto the crank-
shaft making sure the spring side of each seal faces
the center of the crankshaft.
8. Apply oil to the crankshaft bearings; then install
the crankshaft into the upper crankcase half. Be
sure the alignment hole in each bearing is posi-
tioned over its respective retaining pin in the
crankcase; then seat the crankshaft.
MS415
 NOTE: To check the bearing for proper position,
place the point of a sharp tool into the dimple
found in the bearing race. Strike the tool with the
palm of the hand in either direction. If the bearing
moves, it isn't positioned correctly and must be
rotated until it drops onto the retaining pin.
MS988
If the bearings are not properly seated during assem-
bly, the crankcase halves will not seal tightly and
severe engine damage will result.
CAUTION
CM043A
CM045A
47