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Old 11-12-04, 01:57 PM   #1
amahana1
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Sealed hubs question....

I just picked up a pair of wheels off of ebay that have shimano ultegra sealed bearing hubs. I plan on using these wheel to commute on this winter with plenty of snow and ice and slush forcast for these wheels. My question is can these hubs be serviced or repacked over and over to keep the bearings in decent shape or are these hubs considered "disposable".....(non-serviceable)?
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Old 11-12-04, 02:53 PM   #2
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Originally Posted by amahana1
I just picked up a pair of wheels off of ebay that have shimano ultegra sealed bearing hubs. I plan on using these wheel to commute on this winter with plenty of snow and ice and slush forcast for these wheels. My question is can these hubs be serviced or repacked over and over to keep the bearings in decent shape or are these hubs considered "disposable".....(non-serviceable)?
They are cup and ball, and have prety good seals,but do need periodic maintenance.They are no means disposable,unless you totally neglect them and they go TU due to neglect.
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Old 11-12-04, 02:58 PM   #3
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thanks for the response. My next question is what tools do i need to service them..?
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Old 11-12-04, 03:15 PM   #4
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thanks for the response. My next question is what tools do i need to service them..?
Cone wrenches for the bearings.
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Old 11-13-04, 06:23 AM   #5
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Ultegra is highly servicable.
Be very careful with the seals. There is usually some press-in metal insert over the bearings. Some people advise removing it, others say leave it in place. I managed to damage an insert by removal, I say leave in place.
When replacing cones, ensure you have the correct model, they vary in thickness and you need a good match to make the seal. You also need the right version of the rubber sealing ring.
Bearings should really be replaced during annual service. Use ISO 25 grade. I find that packing full of grease wil limit the room for dirt to enter.
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Old 11-13-04, 08:41 AM   #6
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Ultegra is highly servicable.
Be very careful with the seals. There is usually some press-in metal insert over the bearings.
Not to get to the hub bearings. You are referencing getting in to the freehub mechanism itself.
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Old 11-14-04, 12:58 AM   #7
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On the recent Ultegra hubs syndey is correct, however the bulk of the Shimano (and others) use the press in insert that MichaelW mentioned.
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Old 11-14-04, 02:22 AM   #8
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On the recent Ultegra hubs syndey is correct, however the bulk of the Shimano (and others) use the press in insert that MichaelW mentioned.

I have a couple of questions, as I plan to use Ultegra for my next project ....

1. Is there some special tool for removing/installing these seals? Or, any special tips to do it right?

2. Would you call these seals serviceable, or "should be replaced" ?

3. Are they cheap enough so that you just spend a few bucks and plan to use new ones if you are going to the trouble of servicing the hubs?
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Old 11-14-04, 08:17 AM   #9
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They are completely servicable. The first time you take them apart you will be in unfamiliar teritory. You will do some things wrong but that is how most of us learn. The next time you will be MUCH better at it.
A few basic things you can do is to have a well lit place where someone won't mess with it. A table with an old clean white cloth on it helps. One thing I've learned is to just take off a few things the first time. don't go all the way into the hub. Try doing the front wheel first. It is much simpler. As you pull things off the wheel line them up on each side in the order they came off. Take the parts and wash them in subgroups if you need so you keep things in order. I use a pan with some Kerosene in it. Old toothbrushes work well for cleaning. I use bicycle bearing grease to repack bearings. It's good to have someone to fall back on if you have a glitch. If they are good at what they do they will be nice and helpfull.
Ask you bicycle mechanic which tools you will need.
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Old 11-14-04, 09:04 AM   #10
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On the recent Ultegra hubs syndey is correct, however the bulk of the Shimano (and others) use the press in insert that MichaelW mentioned.
I have yet to see a 'pressed in insert' you have to diddle with to get to the hub bearings on any shimano cup and ball hub.
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Old 11-14-04, 09:11 AM   #11
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Originally Posted by cascade168
I have a couple of questions, as I plan to use Ultegra for my next project ....

1. Is there some special tool for removing/installing these seals? Or, any special tips to do it right?

2. Would you call these seals serviceable, or "should be replaced" ?

3. Are they cheap enough so that you just spend a few bucks and plan to use new ones if you are going to the trouble of servicing the hubs?
It's a no brainer.Don't make it rocket science. Forget the BS you have gotten about seals, prying into stuff , and all that crapola.For doing just the basic maintenance on the bearings you need cone wrenches that fit the locknut and the adjusting cone.You don't need to get into the hub body unless it goes TU,and I have yet to have one go there. www.parktool has the how to in the repair section.
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Old 11-14-04, 05:46 PM   #12
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Sydney's right, just do it. You can prepare with some basic stuff. But you just need to do it. Unless you know you are totaly inept in the mechanical stuff. If you don't know if you are you will.
I learned when I was a kid so it wasn't a big deal when i messed up. Maybe you need to think like an inquizitive kid.
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