Page 509 - Manual_Polaris_RZR_ProXP-20-21

BRAKE SYSTEM

REAR CALIPER ASSEMBLY REAR BRAKE DISC INSPECTION

1. Install new caliper seals q in the caliper body w. Be 1. Visually inspect disc for scoring, scratches, or
sure groove is clean and free of residue or brakes gouges. Replace disc if deep scratches are evident.
may drag upon assembly.
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.

2. Coat piston with clean Polaris DOT 4 Brake Fluid (PN
2872189). Install piston e with a twisting motion
while pushing inward. Piston should slide in and out
of bore smoothly with light resistance. Brake Disc Thickness
3. Lubricate the mounting bracket pins r with silicone .295 ± .008″(7.5 ± .2 mm)
grease and install the rubber dust seal boots t. .268″ (6.8 mm)

Brake Disc Thickness Variance:
Service Limit: 0.002″ (0.051 mm)

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
specifications.

Brake Disc Runout:
.010″ (0.25 mm)

4. Compress the mounting bracket and make sure the 10
dust seals are fully seated. Install the brake pads.
Clean the disc and pads with brake parts cleaner or
denatured alcohol to remove any dirt, oil or grease.

9930583 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual 10.31
© Copyright Polaris Industries Inc.