1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 214Get this manual
BRAKES Measure the brake lining thicknessSERVICE LIMIT: 1.0 mm (0.04 in)
For brake panel inspection, see page 12-14- pins, pin holders, brake shoes and shoe springs NOTE
Mark the brake shoes to indicate their original positions before removing them- brake hosebreather tube guide
2) SHOE SPRINGS
Drain the brake fluid (page 12-4)brake hose by loosening the brake joint nut while holding the hose fixed- breather tube from brake panel