2003 Polaris ATV Trail Boss 330 Factory Service Manual, Page 170Get this manual
BRAKES 3Remove caliper from mounting bracket
Polaris DOT Brake Fluid (PN 2870990) 4Push caliper piston into caliper bore slowly using C-clamp or locking pliers with pads installed
5Follow bleeding procedure on Pages 9.6-9.7Check all connections for leaks and repair if necessary
FRONT PAD REMOVAL