9
9929422 R02 - 2017-2019 ACE 900 Service Manual
© Copyright Polaris Industries Inc.
9.23
CALIPER INSTALLATION
1. Install the new rear caliper with the mounting bolts.
Torque mounting bolts to specification.
TORQUE
Rear Caliper Mount Bolt Torque:
40 ft-lbs (54 Nm)
2. Install brake line banjo bolt
q
and torque to
specification.
TORQUE
Brake Line Banjo Bolt:
180 in-lbs (20 Nm)
3. Install the pad adjustment screw and turn until
stationary pad contacts disc, then back off 1/2 turn.
4. Follow bleeding procedure outlined earlier in this
chapter.
5. Install wheel and torque wheel nuts to specification.
TORQUE
Aluminum Wheels:
30 ft-lbs + 90° (41 Nm)
NOTE
If new pads are installed, refer to “Brake Burnishing
Procedure” page 9.17.
DISC INSPECTION
1. Visually inspect disc for scoring, scratches, or
gouges. Replace the disc if any deep scratches are
evident.
2. Use a 0-1” micrometer and measure the disc
thickness at eight different points around the pad
contact surface. Replace disc if worn beyond service
limit.
MEASUREMENT
Brake Disc Thickness
New: .188" (4.78 mm)
Service Limit: .170" (4.32 mm)
MEASUREMENT
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
specifications.
MEASUREMENT
Brake Disc Runout
Service Limit: .010" (.254 mm)
BRAKE SYSTEM
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