10.20
9940259 R02 - 2022 RZR PRO R / PRO R 4 Service Manual
© Copyright Polaris Industries Inc.
FRONT CALIPER DISASSEMBLY /
INSPECTION
1. Remove the mount bracket assembly
q
and dust
boots
w
.
2. Thoroughly clean the caliper before disassembly and
prepare a clean work area for disassembly.
3. Use a commercially available caliper piston pliers to
extract the pistons
e
from the caliper
IMPORTANT
Do not remove the caliper pistons with a standard
pliers. The piston sealing surface will become damaged
if a standard pliers is used.
4. Once the pistons are removed, use a pick to carefully
remove the o-rings
r
from the caliper. O-rings should
be replaced during caliper service.
5. Clean the caliper body, pistons, and retaining bracket
with brake cleaner or alcohol.
NOTICE
Be sure to clean all the seal grooves in the caliper body.
6. Inspect caliper body for nicks, scratches, pitting or
wear.
7. Measure bore size and compare to specifications.
Replace if damaged or worn beyond service limit.
MEASUREMENT
Front Caliper Piston Bore I.D.:
Small Bores: 1.375″ (34.93 mm)
Service Limit: 1.377” (34.98 mm)
Large Bore: 1.500″ (38.10 mm)
Service Limit: 1.502” (38.15 mm)
8. Inspect piston for nicks, scratches, pitting or wear.
BRAKE SYSTEM
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