Arctic Cat 660 cc, Service Manual

Page: 252 / 396

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1. Slide a piece of flexible tubing over the ball of the
bleeder valve and direct the other end into a
container.
0730-434
2. Slowly compress the brake lever and hold. Open
the bleeder valve to release the fluid; then
compress the brake lever repeatedly until all brake
fluid is expelled. Close the bleeder valve.
3. Add new approved brake fluid to the reservoir;
then compress the brake lever and hold. Open the
bleeder valve. Repeat the compression until brake
fluid flows free of air bubbles and appears clean.
„
NOTE: It may be necessary to refill the reservoir
a number of times to eliminate all air bubbles in
the system.
4. When the brake fluid is free of all air and the brake
lever feels firm when compressed, fill the
reservoir to a level just below the high mark; then
install and secure the cover. Remove the tube from
the bleeder valve.
5. Proceed to bleed the brake system (see Bleeding
Brake System in this sub-section).
BLEEDING BRAKE SYSTEM
If the brake lever feels spongy when applied, the brake
system may need to be bled. To bleed the brake sys-
tem, use the following procedure.
1. Remove the master cylinder reservoir cover and
fill the reservoir to the high mark with approved
brake fluid.
2. Slide a piece of flexible tubing over the ball of the
bleeder valve and direct the other end into a
container.
0730-434
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 to a level just below the high mark; then
install and secure the cover. Remove the tube from
the bleeder valve.
CHECKING AND REPLACING
BRAKE PADS
To check and replace the brake pads, use the following
procedure.
1. Measure the thickness of both brake pads. The
brake pad thickness must be greater than 3.2 mm
(0.125 in.). If the brake pad thickness is less than
specified, replacement of both pads is necessary.
! 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 that has
been opened for a long period of time. Unsealed
brake fluid containers will absorb moisture and can
contaminate the fluid inside.