Servicing a Fox Float shock is actually pretty straightforward, you don't even need a lot of tools. All you will need is a Fox Float Service kit, a Shock Pump and tools to remove the shock from your bike, probably a Hex (Allan) Key. You will also need some cloth and IPA (no not Indian Pale Ale) Isopropanol Alcohol, which at the time of writing in the depths of the Global crisis is in short supply and a bit on the pricey side.
To start with you will need to remove the shock from your bike, usually this is a case of removing two bolts, one at each end. You need to be careful doing this a the rear triangle will no longer be attached to the frame and linkages can knock into other parts causing damage.
Once you have the shock removed, you'll need to let the air out a ⅔mm allen key is handy to push down the valve to do this. Once you have let all of the air out (this is vital otherwise you could cause injury or damage), you should be able to unscrew the air sleeve. You should be able to unscrew the air sleeve with your hands, if not first check that you have removed all of the air and use a strap wrench to help.
Once you have the air can removed it's just a case of removing and replacing all the seals lubing with Fox Float fluid, Sram Butter, Slick Honey or similar. Be careful when removing the seals not to scratch any part of the shock or you will be looking at an expensive repair bill. Once you have replaced the seals, the air can is replaced adding in a little fluid into the positive air chamber. Reinstalling the can takes a little bit of pressure to compress the shock to get it to a point where it can be screwed one.
Then it's just a case of repressurising and setting the rebound to your requirements (it's handy to make a note of these before you start). Then finally reinstalling on the bike and going for a ride.
- Remove Shock from frame
- Secure in a vice by the head eyelet
- Unscrew air can
- Wipe off fluid
- Remove end seal
- Remove air can seals
- Clean air can with isopropanol and a lint free cloth
- Replace the seals lube with Fox Float fluid, squeeze white ring to get it in
- Replace end seal, lube with Float fluid
- Remove main seal and back up seals
- Clean with isopropanol and a lint free cloth
- Replace air seal, lube o'ring with Float fluid
- Replace white back up seals, ensure the chamfered ends line up
- Remove main o'ring
- Replace main o'ring, lube with float fluid
- Lube end seal with float fluid
- Replace air can, push over air seal
- Add float fluid 2-3 ml
- Compress air can and screw on
- Replace sag o'ring
- Pressurise to your settings
- Refit to frame
It is very beneficial to record your shock pressure and rebound settings prior to starting so that you can set up your shock to where it was before you started.