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9926806 R03 - 2015 - 2016 RANGER ETX / 570 2-SEAT 2015 - 2016 RANGER 570 CREW Service Manual
© Copyright Polaris Industries Inc.
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5. While holding the caliper and covering the pistons
with a shop towel, carefully apply compressed air to
the brake line inlet to force the pistons out from the
caliper.
CAUTION
Use caution and always wear safety glasses when
working with compressed air.
NOTE
Do not remove the caliper pistons with a pliers. The
piston sealing surfaces will become damaged if a pliers
is used.
6. 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.
7. Clean the caliper body, piston, and retaining bracket
with brake cleaner or alcohol.
NOTE
Be sure to clean seal grooves in caliper body.
FRONT CALIPER INSPECTION - CREW
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
Caliper Piston Bore I.D.:
Std: 1.373” (34.87 mm)
Service Limit: 1.375” (34.93 mm)
2. Inspect piston for nicks, scratches, pitting or wear.
Measure piston diameter and replace if damaged or
worn beyond service limit.
MEASUREMENT
Caliper Piston O.D.:
Std: 1.370” (34.80 mm)
Service Limit: 1.368” (34.75 mm)
3. Inspect the brake disc and pads as outlined in this
chapter.
BRAKE SYSTEM
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