Polaris 2005 SPORTSMAN 400, Servise Manual

Page: 251 / 312

BRAKES
9.15
5. Clean the caliper body, piston, and retaining
bracket with brake cleaner or alcohol.
NOTE: Be sure to clean seal grooves in caliper body.
Clean Components
FRONT CALIPER
INSPECTION
1. Inspect caliper body for nicks, scratches or wear.
Measure bore size and compare to specifications.
Replace if damage is evident or if worn beyond
service limit.
Front Caliper Piston Bore I.D.
Std. 1.188
″
(30.2 mm)
Service Limit 1.193
″
(30.30 mm)
2. Inspect piston for nicks, scratches, wear or
damage. Measure diameter and replace if
damaged or worn beyond service limit.
3. Inspect the brake disc and pads as outlined for
brake pad replacement this section. See Pages
9.10--9.11.
FRONT CALIPER REASSEMBLY
1. Install new O-rings (A) in the caliper body (B). Be
sure groove is clean and free of residue or brakes
may drag upon assembly.
A
B
C
2. Coat piston with clean Polaris DOT 3 Brake Fluid
( PN 2870990 ) (C). Install piston (D) with a
twisting motion while pushing inward. Piston
should slide in and out of bore smoothly, with light
resistance.
3. Lubricate the mounting bracket pins with Polaris
Premium All Season Grease, and install the
rubber dust seal boots.