2011 Polaris Ranger RZR ATV Service Manual, Page 347Get this manual
BRAKES Disc Replacement
123Remove rear brake caliper (see "REAR CALIPER SERVICE")Remove wheel hub cotter pin, castle nut and washersRemove the hub assembly from the vehicle and remove the (4) bolts retaining the disc to the hub(4) Bolts
TROUBLESHOOTING
Brakes SquealPoor Brake Performance
Air in system Water in system (bra fluid contaminated) Caliper or disc misaligned Caliper dirty or damaged Brake line damaged or lining ruptured
Cotter Pin Washers
Worn disc andor friction pads Incorrectly adjust stationary pad Worn or damaged master cylinder or components Damaged break pad noise insulator Brake pads dragging Brake caliper dragging Nut
Pedal Vibration
Disc damaged Disc worn (runout orthickness variance exceeds service limit)