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Front hub issues #548657
06/15/14 5:55 pm
06/15/14 5:55 pm
Joined: Mar 2012
Posts: 88
Hawaii
P
PineappleTrump Offline OP
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PineappleTrump  Offline OP
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P
Joined: Mar 2012
Posts: 88
Hawaii
Aloha all,

I was stripping and cleaning my front conical hub on my 72 OIF t120rv and I noticed these two sections on the spot where the wheel bearings would sit. the two blemishes are on the right side of the hub. I ran my finger on them and the ridge is pretty noticeable.

Is this something that can be sanded down or milled down to be still useable, or am I stuck with finding a new hub?

Thanks again for the advice, I know I ask alot of questions but these are my first forays into vintage brit iron.

[img]http://s1364.photobucket.com/user/mulliganke/media/photo21_zpsb747ffc4.jpg.html?sort=3&o=0[/img]

[img]http://s1364.photobucket.com/user/mulliganke/media/photo14_zps81e39f05.jpg.html?sort=3&o=1[/img]

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Re: Front hub issues [Re: PineappleTrump] #548673
06/15/14 8:43 pm
06/15/14 8:43 pm
Joined: Dec 2004
Posts: 9,060
Scotland
kommando Online content
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kommando  Online Content
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Joined: Dec 2004
Posts: 9,060
Scotland
DPO at play (dump previous owner) but retrievable with sanding.

Re: Front hub issues [Re: kommando] #548683
06/15/14 9:10 pm
06/15/14 9:10 pm
Joined: Jul 2009
Posts: 3,549
Vic. Australia
P
Pete R - R.I.P. Offline
In Remembrance
Pete R - R.I.P.  Offline
In Remembrance
P
Joined: Jul 2009
Posts: 3,549
Vic. Australia
Ease the high spots down with a dremel,file or scraper.If the bearing is still tight,pretend it never happened.

Re: Front hub issues [Re: PineappleTrump] #548692
06/15/14 9:47 pm
06/15/14 9:47 pm
Joined: Mar 2012
Posts: 88
Hawaii
P
PineappleTrump Offline OP
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PineappleTrump  Offline OP
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P
Joined: Mar 2012
Posts: 88
Hawaii
Thats what I gathered kommando, it seemed like someone tried driving bearings our with a chisel or screwdriver hence all the ripples. Ill look for some fine sandpaper and try it.

Re: Front hub issues [Re: PineappleTrump] #548702
06/15/14 11:07 pm
06/15/14 11:07 pm
Joined: Feb 2008
Posts: 4,131
New Jersey USA
Tridentman Online content

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Tridentman  Online Content

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Joined: Feb 2008
Posts: 4,131
New Jersey USA
I have had a conical hub with this problem from a DPO.
Comes back nicely using an old style bearing scraper.
HTH

Re: Front hub issues [Re: PineappleTrump] #548707
06/15/14 11:36 pm
06/15/14 11:36 pm
Joined: Mar 2012
Posts: 88
Hawaii
P
PineappleTrump Offline OP
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PineappleTrump  Offline OP
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Joined: Mar 2012
Posts: 88
Hawaii
What is an old style bearing scraper?

Re: Front hub issues [Re: PineappleTrump] #548720
06/16/14 2:08 am
06/16/14 2:08 am
Joined: Jun 2007
Posts: 5,557
Maui Hawaii
HawaiianTiger Online content

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HawaiianTiger  Online Content

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Joined: Jun 2007
Posts: 5,557
Maui Hawaii
This is the kind I have. Got it from Snap-on. It's called a three corner bearing scraper. One of the most handy tools I own.
Cheers,
Bill



Bikes
1974 Commando
1985 Honda Nighthawk 650
1957 Thunderbird/T110 "Flying Tiger"
Antique Fans: Loads of Emersons (Two six wingers) plus gyros and orbiters.
Re: Front hub issues [Re: PineappleTrump] #548751
06/16/14 9:15 am
06/16/14 9:15 am
Joined: Mar 2005
Posts: 10,022
Boston, Massachusetts
J
John Healy Online content

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John Healy  Online Content

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Joined: Mar 2005
Posts: 10,022
Boston, Massachusetts
One of the first tools we made in school. We would take old three corner files and grind the sides concave to produce three cutting edges. Two things to remember is to make sure the grinder's tool steady rest is right up to the wheel with no gap between it and the stone and not to over heat the metal. You should never let the metal get hot enough to show ANY signs of discoloration, even light straw. Keep water handy to cool the file as you grind. I have these made from swiss files right up through 12" versions. Like Bill said, one of the handiest tools in the box.


Re: Front hub issues [Re: PineappleTrump] #548795
06/16/14 1:55 pm
06/16/14 1:55 pm
Joined: Aug 2001
Posts: 1,513
Jordan, NY
Al Eckstadt Online content
BritBike Forum member
Al Eckstadt  Online Content
BritBike Forum member
Joined: Aug 2001
Posts: 1,513
Jordan, NY
When I started as an equipment mechanic my boss had a scraper made from a file. I had to make one. Pretty much did as John said. I still have it today and it holds its edge better than the store bought ones I have.

I don't think you'll have a problem after removing those ridges. But if there's a tiny bit of looseness, a very small smear of loctite bearing retainer will ensure it doesn't move around.

Oh s**t, I recommended loctite with Mr. Healy listening. Off to the doghouse.

Al


Al Eckstadt
Re: Front hub issues [Re: PineappleTrump] #548805
06/16/14 3:36 pm
06/16/14 3:36 pm
Joined: Mar 2012
Posts: 88
Hawaii
P
PineappleTrump Offline OP
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PineappleTrump  Offline OP
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P
Joined: Mar 2012
Posts: 88
Hawaii
I was looking at it some more and I am wondering if the bearings will sit just before that mess in there. I am at the point of maybe looking for a different front end or another hub if it becomes an issue.

Re: Front hub issues [Re: PineappleTrump] #548853
06/16/14 8:23 pm
06/16/14 8:23 pm
Joined: Feb 2008
Posts: 4,131
New Jersey USA
Tridentman Online content

BritBike Forum member
Tridentman  Online Content

BritBike Forum member
Joined: Feb 2008
Posts: 4,131
New Jersey USA
Pineapple--no need for a new hub--the one you have can be brought back to usable quite easily.
Bearing scrapers are available at good engineering supply stores. Try it--very careful strokes applying quite a lot of force and small movement and the surplus material will come off. It is only an aluminum alloy so is pretty soft.
The alternative is to take the hub to Hawaiian Tiger along with a few pints as payment---I am sure he would do it for you. As would I if you were living in Joooisey.
But--an ideal opportunity to learn a new skill.
HTH

Re: Front hub issues [Re: PineappleTrump] #548880
06/16/14 11:38 pm
06/16/14 11:38 pm
Joined: Mar 2012
Posts: 88
Hawaii
P
PineappleTrump Offline OP
BritBike Forum member
PineappleTrump  Offline OP
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P
Joined: Mar 2012
Posts: 88
Hawaii
Im going to sit on it a bit, find this tool and maybe fix it up. Im still kinda leaning towards a t140 disc brake front end on this bike, but will see

Re: Front hub issues [Re: PineappleTrump] #548888
06/17/14 3:51 am
06/17/14 3:51 am
Joined: Nov 2009
Posts: 2,066
Netherlands
Peter R Online content

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Peter R  Online Content

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Joined: Nov 2009
Posts: 2,066
Netherlands
No real need to switch to a disc brake front end.
Folk lore has it that these conical hub type brakes were poor stoppers, but in reality, these brakes work fine when they are set up correctly.
From the pictures, the damage on the bearing surface does not look too serious, and will certainly be easy to fix.


Peter.
1974 Commando 850
1972 Trident T150T
1961 Goldie DBD34
1969 Benelli 250 sport special

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