Bleeding The Hydraulic Brake System - Polaris Frontier Owner's Manual

MAINTENANCE
General Maintenance

Bleeding the Hydraulic Brake System

Air in the hydraulic brake system will cause spongy brake lever action.
Bleed the system before operating the snowmobile.
Operating the vehicle with a spongy brake lever can result in
loss of brakes, which could cause an accident and lead to
serious injury or death. Never operate the vehicle with a
spongy-feeling brake lever.
During the bleeding procedure, keep the brake handle as level as
possible. The reservoir must be in this position to minimize the
possibility of air entering the system through the reservoir vent.
1. Remove the brake master cylinder reservoir cover and gasket.
2. Fill the master cylinder reservoir to between the MIN and MAX
marks or 1/4-5/16" (.6-.8 cm) below the lip of the reservoir
opening. Reinstall the gasket and cover.
3. Slip a rubber tube over the ball of the bleeder valve and direct the
flow of fluid into an approved container.
4. Squeeze the brake lever a full stroke. Then unscrew the bleeder
valve 3/4 of a turn to release air.
5. Close the bleeder valve and release the brake lever.
6. Repeat steps 4 and 5 until fluid flows from the bleeder valve in a
solid stream free of air bubbles.
Overfilling the master cylinder leaves no room for fluid expansion
and may cause the brakes to lock, resulting in serious injury or
death. Always maintain the brake fluid level between the MIN
and MAX marks on the reservoir as recommended.
7. After bleeding is complete, refill the reservoir to the recommended
level. See page 87.
8. Reinstall the gasket and cover.
88
WARNING
WARNING