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9925723 R01 - 2015 RZR 900 Service Manual
© Copyright 2014 Polaris Industries Inc.
FRONT BRAKE DISC
Front Brake 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.
Brake Disc Thickness
New: .0188″ (4.78 mm)
Service Limit: 0.170″ (4.32 mm)
Brake Disc Thickness Variance
Service Limit: 0.002″ (.051 mm)
difference between measurements
Front Brake Disc Runout
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.
Brake Disc Runout:
Service Limit: 0.010″ (0.254 mm)
BRAKE SYSTEM
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