Arctic Cat Sno Pro 120 Service Manual page 340

3. Inspect the piston bore of the inner and outer brake
calipers for gouges, cracks, pitting, scuffing, or cor-
rosion. If any of these conditions exist, replace the
caliper.
4. Clean the caliper inner wall surface using a soft lint-
free cloth and clean brake fluid.
CAUTION
Care must be taken not to allow any contaminants into
the fluid passages of the calipers or brake system
malfunction may occur.
5. Inspect the condition of the brake pads. Replace if
damaged or worn. 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 neces-
sary.
6. Inspect the brake hose for cracks and deterioration
and check the condition of the threaded connectors.
6-48
Assembling/Installing
1. Apply approved brake fluid to the new O-ring; then
install the O-ring into the groove of each caliper half.
Never reuse piston O-rings. Always install new O-
rings when installing pistons in the brake caliper.
2. In each caliper half, apply approved brake fluid to
the brake piston; then while twisting, install the pis-
ton with the dished side facing out.
ZJ225A
MS320A
 NOTE: To aid in installing the piston, make sure the
piston O-ring is properly seated in the groove of the
caliper housing.
3. Place the small O-ring into position; then assemble
0739-269 the two caliper halves. Secure with the two torx-head
cap screws. Tighten only until snug.
CAUTION
ZJ231
ZJ229
ZJ230