Polaris 800 INDY XC 129 2019 Owner's Manual page 118

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 inch (.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 4–5 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 add brake
7. After bleeding is complete, refill the reservoir to the proper level. See page
115.
8. Reinstall the gasket and cover.
116
WARNING
WARNING
fluid to the fill line as recommended.