BVM PNP F-16 Assembly And Operating Manual page 37

 The "O" Ring Brake hub will slide off the axle. Note the location of the thin white Teflon
washer for reassembly. Sharpen one end of a wood mix stick as shown.
NOTE: Do not touch the "O" Ring or aluminum groove with any other kind of tool.
 Apply air pressure to the nipple to push "O" Ring out then pinch with fingers while prying
the "O" Ring off the disc with the wood stick.
 Massage Super O lube onto the entire O
Ring.
 Clean the Brake Hub and install the O
Ring.
BVM ®2016 36 4/12/2019