9.14
9929422 R02 - 2017-2019 ACE 900 Service Manual
© Copyright Polaris Industries Inc.
5. Once the pistons are removed, use a pick to carefully
remove the square O-rings from the caliper. O-rings
should be replaced during caliper service.
6. Clean the caliper body
q
, pistons
w
, and retaining
bracket
e
with brake cleaner or alcohol.
NOTE
Be sure to clean seal grooves in caliper body.
CALIPER INSPECTION
1. Inspect caliper body for nicks, scratches, pitting or
wear. Measure bore size and compare to
specifications. Replace if damaged or worn beyond
service limit.
MEASUREMENT
Front Caliper Piston Bore I.D.:
Std: 1.190-1.191” (30.25-30.27 mm)
Service Limit: 1.193” (30.30 mm)
2. Inspect piston for nicks, scratches, pitting or wear.
Measure piston diameter and replace if damaged or
worn beyond service limit.
MEASUREMENT
Front Caliper Piston O.D.:
Std: 1.1860-1.1875” (30.12-30.16 mm)
Service Limit: 1.1858” (30.11 mm)
3. Inspect the brake disc and pads as outlined in this
chapter.
BRAKE SYSTEM
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