Well i asked on here and haven't had an answer to my question the instructions are as clear as mud….
i just did an air can service of my 05 (ish shock)((the one with 2 air valves rather than the lever)….
remove from bike
remove slider frame spacers
let air the of the shock and SPV (very important)
you need a strap wrench although the air can is very very tight and i wound up using brand new vise grips ( only left two marks on the shock canister (gripped it on the section where the seal is didn't need too much force) can grab a photo if you like its the thickest at this point and i didn't crush it 🙂
once its slack
remove the red SPV valve core
then put a long 3mm alan key into the red valve head and unscrew the valve head..
with the rebound adjuster end bushes end in a vice completely unscrew the air can..
then pull up (your fighting the negative air spring doing this)
once it pulls apart
clean and degrease the internals with meths or Isopropol alcohol..
next grease the piston o-ring with something like Prep-M or Judy butter
(now this next bit is guess work by me since i couldn't find the info)
get some red rum / fox float fluid (10 cc ish)
add 5cc to the air can with the piston still stuck out to lube the negative side and push in and add the remaining 5 to the positive side
push body back together screw the air can back together (grease the seal o-ring)
refit the red SPV valve and core
pump back up
jobs a gooden