Polaris RZR XP 1000 Owner's Manual page 143

4. If the fluid level is lower than the lower level line, add brake fluid to the upper
line.
Do not overfill the brake system reservoir. Overfilling can cause pressure
build-up leading to brake drag, system degradation, and brake system failure.
5. Apply the brake forcefully for a few seconds and check for fluid leakage
around the fittings.
WARNING
MAINTENANCE
141