9.21
BRAKES
9
9924096 - 2013 RANGER RZR XP 900 / RZR XP 4 900 Service Manual
© Copyright 2012 Polaris Sales Inc.
FRONT BRAKE DISC
Disc Runout
1. Mount dial indicator as shown to measure disc
runout. Slowly rotate the disc and read total runout on
the dial indicator. Replace the disc if runout exceeds
specification.
Disc Inspection
1. Visually inspect disc for scoring, scratches, or
gouges. Replace disc if deep scratches are evident.
2. Use a 0-1” micrometer and measure disc thickness at
eight different points around the pad contact surface.
Replace disc if worn beyond service limit.
Disc Replacement
1. Remove the front brake caliper (see “FRONT
CALIPER SERVICE”).
2. Remove wheel hub cotter pin, castle nut and washers.
3. Remove the wheel hub assembly from the vehicle and
remove the (4) bolts retaining the disc to the hub.
4. Clean the wheel hub mating surface and install new
disc on wheel hub.
Brake Disc Runout:
Service Limit: .010” (.254 mm)
Measure
Thickness
Front
Disc
Brake Disc Thickness
New: .188” (4.78 mm)
Service Limit: .170” (4.32 mm)
Brake Disc Thickness Variance
Service Limit: .002” (.051 mm)
difference between measurements
Cotter
Pin
Washers
Nut
(4) Bolts
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