2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 173Get this manual
BRAKES BRAKE SYSTEM SERVICE NOTES
Disc brake systems are light weight, low maintenance, and perform well in the conditions this vehicle will routinely encounterThere are few things to remember when replacing disc brake pads or performing brake system service to ensure proper system function and maximum pad service life Do not over-fill the master cylinder fluid reservoir Make sure the brake leverpedal returns freely and completely Adjust stop pin on calipers after pad service Check and adjust master cylinder reservoir fluid level after pad service Make sure atmospheric vent on reservoir is unobstructed Test for brake drag after any brake system service and investigate cause if brake drag is evident Make sure caliper moves freely on guide pins (where applicable) Inspect caliper piston seals for foreign material that could prevent caliper pistons from returning freely Perform brake burnishing procedure after installing new pads to maximize service life DO NOT lubricate or clean the brake components with aerosol or petroleum productsUse only approved brake cleaning products