Arctic Cat Sno Pro 120 2011, Service Manual

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7
FS010
21. Slide bearing assembly off of shaft.
22. Remove the bleed screw from the bearing and set
them both on a clean, lint-free towel.
REBUILDING
1. Using a pair of snap ring pliers, remove the snap ring
from the bearing housing. Using fingers, remove the
FIST scraper from the housing. Using a scribe,
remove the O-ring from the inside of the FIST
scraper by “spearing” the seal with the point of the
scribe and pulling it out.
FS011
2. Using a scribe, remove the U-cup wiper and O-ring
seals from the bearing housing.
3. Thoroughly clean the FIST bearing, bearing housing,
and piston assembly with solvent. Dry with com-
pressed air in a well ventilated area.
4. Using a scribe, remove the O-ring seal from the IFP.
5. Install the new, well lubricated O-ring into the FIST
bearing. Check to make sure the O-ring is properly
seated and is not twisted.

NOTE: To aid in proper seating of the O-ring, it may
be advisable to use a soft, blunt object (non-writing
end of a pen, etc.) to push it in.
6. Install the new, well lubricated O-rings into the bear-
ing housing making sure the shaft O-ring is in the
groove next to the DU bushing and that the O-rings
are properly seated and not twisted. It may be advis-
able to use a soft, blunt object to push it in.
7. Install the new U-cup seal into bearing. U-cup
should be installed so the cupped end is facing the
DU bushing inside of bearing. Check to make sure
seal is properly seated. It may be advisable to use a
soft, blunt object to push it in.
8. Install FIST bearing into housing. Check for proper
orientation of the FIST bearing. The stepped side of
the FIST bearing should be visible.
9. Using a pair of snap ring pliers, install the snap ring
into the bearing housing. Check for proper orienta-
tion of the snap ring. The flat side of the snap ring
should be visible. Check to make sure the snap ring
is properly seated.
FS007
10. Install the new, well greased O-ring onto the IFP.
11. Replace the bearing bleed screw O-ring.
ASSEMBLING
1. Clamp shaft eyelet securely in vise and place a seal
tool on end of shaft.
2. Lubricate the bearing assembly seals with an assem-
bly lube. Slide the bearing assembly onto shaft with
the FIST bearing facing the eyelet. This should be
done in a single smooth motion to avoid damaging
the seals.
3. Hold the piston assembly from underneath the top-
out plate and place the end of the screwdriver onto
the end of the shock shaft. Slide the piston assembly
onto the shaft end. Check to make sure the piston
assembly is seated properly and install the piston
lock nut. Tighten nut to 18 ft-lb. Remove shaft
assembly from vise and set it aside on a clean, lint-
free paper towel.
CAUTION
Use care when passing the bearing over the shaft
threads not to scratch the inside of the bearing
assembly.
CAUTION
Care must be taken when using a scribe to remove a
seal. Always spear the seal with the point of the
scribe. Do not attempt to wedge the scribe behind the
seal as this could cause damage to the seal groove
and compromise the performance of the shock.
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