9.29
BRAKES
9
9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
© Copyright 2011 Polaris Sales Inc.
REAR BRAKE DISC
Inspection
1. Visually inspect disc for scoring, scratches, or
gouges. Replace the disc if any deep scratches are
evident.
2. Use a micrometer and measure disc thickness at 8
d
ifferent points around perimeter of disc. Replace
disc if worn beyond service limit.
3. Mount dial indicator and measure disc runout.
Re
place the disc if runout exceeds specifications.
Brake Disc Thickness:
Service Limit: .170” (4.318 mm)
Brake Disc Thickness Variance:
Service Limit: .002” (.051 mm)
Between Measurements
Brake Disc Runout
Service Limit: .010” / .254 mm