Brake Disc Service; Disc Inspection - Polaris Sportsman 850 Service Manual

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BRAKE SYSTEM

BRAKE DISC SERVICE

1. Visually inspect brake disc for scoring, scratches, or

gouges. Replace disc if deep gouges are evident.

2. Measure the disc thickness at 8 different points

around the pad contact surface using a 0– 1"

micrometer. Replace disc if worn beyond service

Brake Disc Thickness:

New: .187" (4.75 mm)

Service Limit: .167" (4.24 mm)

Brake Disc Thickness Variance:

Service Limit: .002" (.051 mm)

(difference between measurements)

3. Mount a dial indicator and 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: 010" (.254 mm)

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Sportsman 1000