2003 Polaris ATV Trail Boss 330 Factory Service Manual, Page 180Get this manual
Caliper Halves Bolt Torque: 10Inspect surface of caliper piston for nicks, scratches, or damage and replace if necessary18 ftlbs(25 Nm)
REAR CALIPER ASSEMBLY
4Install brake pads in caliper body with friction material facing each otherIf equipped with pad spacer, install the spacer between the padsInstall retaining pin through outer pad, pad spacer and inner pad5Install caliper and torque mounting bolts
Piston Seals