Seals - Arctic Cat Cougar Service Manual

GENERAL INFORMATION
required to remove all traces of oil and
other chemical deposits.
a. The housing must be heated to a tempera-
ture of about 100° C (212° F) in an oven or
on a hot plate. An easy way to check to see
that it is at the proper temperature is to drop
tiny drops of water on the case. If they sizzle
and evaporate immediately, the temperature
is correct. Heat only one housing at a time.
CAUTION
Do not heat the housing with a propane
or acetlyene torch. Never bring a flame
into contact with the bearing or housing.
The direct heat will destroy the case
hardening of the bearing and will likely
warp the housing.
b. Remove the housing from the oven or hot
plate and hold onto the housing with a
kitchen pot holder, heavy gloves or heavy
shop cloths-it is hot.
@
NOTE
A suitably sized socket and extension
works well for removing and installing
bearings.
Spring
Dust lip
31
c. Hold the housing with the bearing side
down and tap the bearing out. Repeat for all
bearings in the housing.
d. While heating up the housing halves, place
the new bearings in a freezer if possible.
Chilling them will slightly reduce their
overall diameter while the hot housing as-
sembly is slightly larger due to heat expan-
sion. This will make installation much
easier.
NOTE
Always install bearings with the manu-
facturer's mark or number facing out-
ward, unless the text directs otherwise.
e. While the housing is still hot, install the new
bearing(s) into the housing. Install the bear-
ings by hand, if possible. If necessary,
lightly tap the bearing(s) into the housing
with a socket placed on the outer bearing
race. Do not install new bearings by driving
on the inner bearing race. Install the bear-
ing(s) until it seats completely.
SEALS
Seals (Figure 76) are used to prevent leakage
of oil, grease or combustion gasses from a hous-
ing and a shaft. Improper procedures to remove
a seal can damage the housing or the shaft.
Improper installation can damage the seal. Note
the following:
a. Prying is generally the easiest and most
effective method of removing a seal from a
housing. However, always place a rag un-
derneath the pry tool to prevent damage to
the housing.
b. A low temperature grease should be packed
in the seal lips before the seal is installed.
c. Oil seals should always be installed so that
the manufacturer's numbers or marks face
out.