Arctic Cat Sno Pro 120 Service Manual page 336

1. With the handlebar in the highest position, remove
the reservoir cover and fill the reservoir with
approved brake fluid.
CAUTION
Brake fluid is highly corrosive. Do not spill brake fluid
on any surface of the snowmobile.
! WARNING
Use only approved brake fluid. Any substitute may
result in a loss of brakes.
! WARNING
Do not use brake fluid from a container opened for a
long period of time. Unsealed brake fluid containers will
absorb moisture and can contaminate the fluid inside.
2. Slide a piece of flexible tubing over the ball of the
bleeder valve and direct the other end into a container.
Bearcat/F-Series/T-Series
3. Slowly compress the brake lever and hold. Open the
bleeder valve to release the fluid and air. When the
fluid stops flowing, close the bleeder valve; then
release the brake lever.
4. Repeat step 3 until the brake fluid flows free of air
bubbles.
 NOTE: It may be necessary to refill the reservoir
during the bleeding process.
5. When the brake fluid is free of all air and the brake
lever feels firm when compressed, fill the reservoir;
then install and secure the cover. Remove the tube
from the bleeder valve.
6-44
CHECKING AND REPLACING BRAKE
PADS (Bearcat/F-Series/T-Series)
1. Remove the brake fluid reservoir cover; then remove most
of the brake fluid from the reservoir. Replace the cover.
 NOTE: The above procedure will allow room for the
fluid from the caliper when the pistons are pushed
into the caliper for installing new brake pads. Replac-
ing the cover will prevent fluid spillage.
2. Open the right-side access panel and remove the
springs and hairpin clip securing the resonator; then
remove it from the engine compartment.
 NOTE: Measure the thickness of both brake pads.
The brake pad thickness must be greater than 0.20 in.
If the brake pad thickness is less than specified,
replacement of both pads is necessary.
F/M/XF
739-269B
3. Remove the hairpin clip from the brake pad retaining
pin; then remove the pin.
F/M/XF
PC223A
 NOTE: When installing new brake pads, always
install them as a set. Never install just one pad or use
brake pads used in another snowmobile.
4. Using a pair of pliers, pull one brake pad out of the
caliper assembly.
 NOTE: Changing one pad at a time will prevent one pis-
ton from pushing out the other piston from the caliper.
0739-269
ZJ222