2004 John Deer Buck Utility ATV 500, 500EX and 500EXT Service Manual, Page 236Get this manual
With vacuum pump: Install vacuum pump to bleed valveSee the manufacturer's operating instructions Pump vacuum pump and loosen bleed valveClose bleed valve and refill reservoir when the fluid level is low Repeat the procedure until no more air bubbles appear in bleed hose
Close bleed valve and operate brake lever no4 or brake pedal no38If it still feels spongy, bleed system again Repeat the procedures until air bubbles don't appear in tube and lever or pedal is stiff
V01K18A
Fill reservoir to the upper level with DOT brake fluidInstall diaphragm and cover on reservoirWithout vacuum pump:
V01k18a3.EPS