Servicing the hubs can be done with the following tools:
- two 5mm hex keys
- soft faced hammer
- an old stanley knife blade
- 6802RS 2 in the front wheel and 2 in the rear wheel
- 6902RS 2 in the rear wheel
- Light grease
- flat head screwdriver
- patience
TUNE offers a mag tool kit. This is their hub service kit. Having the right tools for the job makes it easier
I'll write this completely about the rear hub as the front hub is the simplified version of the rear.
- Remove the cassette from the body.
- Put the 5mm hex keys in its sockets in the axle, start turning counter clockwise and you'll find that at the free hub body side the axle end cap will come loose.
The non drive side of the hub. - Remove the washers and o ring as well and put these aside after a bit of cleaning.
- Now put the wheel with the body facing down on the ground and push down on the rim. The axle will pop out partially as a result.
(if this doesn't work place a piece of wood over the axle and tap it with the hammer.) - Gently pull the body from the axle and give it a clean while you have it in your hands.
Here is a look inside the hub with the XOT baring and the axle still in place. Although the axle is disconnected from the XOT bearing. - Gently pull out the axle.
- Push the XOT bearing out of the hub shell
- Clean the ratchet system thoroughly.
- With the axle now in your hand you will find that the left side bearing will still be in the hub, or as in most cases it sits on the axle.
- Now pick of that Stanley blade that caused you to raise your eyebrows when you first read it. The aluminum of the axle is light and brittle so you need to gently pry it off. This can be a painstakingly slow procedure as you need to wiggle the damn bearing off the axle.
- Now that everything is apart clean it thoroughly.
- Check how the bearings are and replace when needed.
Let the rebuilding begin! - Put the bearings in the freezer. This way they will pop in easier in about 15 mins.
- Smear a thing coating of light grease on the non drive side bearing seat.
- After you have waited the 15 minutes for the bearings to cool grab the 6902RS and put it into its NDS socket using hand force.
- Smear some light grease on the seat of the XOT bearing.
- Stick the axle through the NDS bearing and make sure it sits straight.
- Tune has some cool tools to install the XOT bearing, but you can also put the XOT bearing on the axle (small bearing to the DS) and then guide it to its seat.
- once it is in it's seat you gently need to force it in there (freezer) inverting the cassette body with a lock ring works as it gives enough shoulder to push against the bearing.
- Check if you need to replace the 6802RS bearing in the body, you can easily tap it out and with the freezer trick install a new one.
- Now that the XOT and NDS bearing are properly in place we can start to install the body.
- Smear a thick lube on the ratchet system. (in this case I have tried a silicon lube from Cyclon)
- Drop a bit of lube on the springs and pawls as well.
- Put the body back on and use a flat head screwdriver to push the pawls into the ratchet system.
- Once the pawls are back in place push the body on tight.
- put the Washers and 0 ring around the axle and install the axle end cap.
- Make sure things are tight enough so your wheel has no more play once the QR locks the wheel in the frame.
The front hub is essentially the same. Although much less complicated.
Good Luck!