Caliper Installation; Disc Inspection - Polaris ACE 900 2017 Service Manual

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
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.
9929422 R02 - 2017-2019 ACE 900 Service Manual
© Copyright Polaris Industries Inc.
5. Install wheel and torque wheel nuts to specification.
If new pads are installed, refer to "Brake Burnishing

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.
q
and torque to
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 SYSTEM
TORQUE
Aluminum Wheels:
30 ft-lbs + 90° (41 Nm)
NOTE
Procedure" page 9.17.
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
MEASUREMENT
Brake Disc Runout
Service Limit: .010" (.254 mm)
9
9.23