Got back from a week of riding in SW Colorado and went to change back to my street wheels and tires and discovered the dreaded cush hub bearing failure. I have the parts as 6204 x2 cush hub bearings 30x40x70 x1 cush hub seal I'm going to go ahead and do the wheels while I'm at it 6203 x2 rear wheel bearings 30x40x7 x1 rear wheel seal 6203 x2 front wheel bearings 25x40x7 x2 front wheel seals I do have a question, though. As opposed to reinventing the wheel, no pun intended, is there a method for getting that spacer pipe out of the cush hub and getting it back in? I've pulled and pressed plenty of bearings but never had a set with a spacer pressed in like that.
See HF's write up: http://advrider.com/index.php?threa...uestions-thread.850525/page-267#post-25452503
Any advice on bearing type? I don't want to go back with SKF. I've been advised to use Japanese bearings like NTN, and I'm sure Timken would work if I could find them. I've determined that C3 is the correct tolerance but what type of shielding/seal is correct? I see specs for single or double shield. Single and double seal. I'm not sure of the difference between shielded and sealed or single and double and don't know which is correct for this application. I'm guessing that single and double are referring to one side or both sides but my guesses have not always proven to be correct.
Others will have to chime in about bearing specifics. I'm unfamiliar, and have not changed any of mine yet.
Starting with a bearing with a manufacturer's name on it is a good starting point. Mine were replaced with SKF and to date I haven't any issue with them. 8,000kms. You can lift the seal and check that it has enough grease if you are concerned. I don't think Temken supply the size of bearing required. Check with your bearing supplier about the type of sealed bearings you need. Also, I heated my carrier in an oven at 100c to removed the bearings and put the new bearings in the freezer and heated the carrier to re-install.
Would you mind posting your mileage at failure? Might be of use to some folks on the fence about bearing replacement.
