9.18
BRAKES
9923523 - 2012 RANGER RZR 570 Service Manual
© Copyright 2011 Polaris Sales Inc.
Caliper Inspection
1. Inspect ca liper b ody for n icks, scratches, pitting or
wear. Measure bor e size and compare to
specifications. Re place if damaged or wo rn beyond
service limit.
2. Inspect pist on fo r nic ks, scr
atches, pitting or wear .
Measure piston diameter and replace if damaged or
worn beyond service limit.
3. Inspect the br ake disc and pa ds as o utlined in th is
chapter.
Caliper Assembly
1. Install new O-rings in the caliper body. Be sure the
grooves are clean and free of residue or brakes may
drag upon assembly.
2. Coat pistons with clean Polaris DOT 4 Brake Fluid.
Ins
tall pistons with a twisting motion while pushing
inward. Pisto n sh ould slide in and ou t of b ore
smoothly, with light resistance.
3. Lubricate the mounting bracket pins w ith silicone
gre
ase and install the rubber dust seal boots.
4. Compress the mounting bracket and make sure the
dust seal
boots are fully seated. Install the brake pads.
Clean the disc and pads with brake parts cleaner or
denatured alcohol to remove any dirt, oil or grease.
Front Caliper Piston Bore I.D.:
Std: 1.004” (25.5 mm)
Service Limit: 1.006” (25.55 mm)
Front Caliper Piston O.D.:
Std: 1.002” (25.45 mm)
Service Limit: 1.000” (25.4 mm)
Apply Grease to Each
Bracket Pin