Wire Wheel Sprocket Carrier

SandPebbles

SandPebbles

Junior member
Location
Madison, CT U.S.A.
I was installing new bearings in my sprocket carrier and two questions came up.

A little background first.  This is a '74 3C with borrani wire wheels.  The assembly has
been apart for awhile because I had to replace my wheels after an unscrupulous restorer
"misplaced" my originals.  Therefore the wheel assemblies were on "hold" till I could find
new rims and hubs.

I heated up the carrier in the oven at 250 degrees F for about a 1/2 hour and cooled the bearings
in the freezer overnight.  The inner most bearing dropped right in on the backside of the carrier.
The outer bearing put up some resistance, but I tapped her in using a 36mm socket.  I did
remember to install the spacer between the bearings.

Bearings are SKF 6205-2RSJEM Explorer series and fit the cavities very nicely.

First question...how tight should the bearing be against the spacer?  If I tap the bearings
in so they are flush with the surface of the carrier, the spacer spins with the inner races
and it appears to turn "firm."  I do not want them too loose so the spacer slides around
on the spindle.  Should the spacer turn with bearings?

Next, I installed the "top hat" bushing from the backside of the sprocket carrier.  I remembered
to install the cone shaped disc first.  I tapped the bushing through the bearings till the shouldered
brim was firm against the cone disc which was firm against the inner bearing.

I turned over the assembly and slid on the thin distance piece (or thick washer if you will).
This piece has a raised lip that matched the inner race of the outer bearing.  So far, so good.

I threaded the big 36mm nut down the bushing that is now protruding from the outer bearing.
But wait!, the nut runs out of thread long before it tightens up against the thin distance piece
and bearing.  Is this correct?

Without having the swing arm and rear wheel fully assembled for a test fit, I am not sure if
the above is correct.  Looking at the exploded view in the manual, I cannot tell what will take
up this space. 

Any insight into this assembly would be great!

Thanks,

Best Regards,

John

 
O.K., I found an old picture of my bike taken from the rear quarter and
zoomed in on the axle.

It looks like the big 36mm nut is outboard of the swinging arm.  The spindle
nut appears tight against the 36mm nut.  Is this correct?  I'm not positive the PO
had it together completely correct, and it is hard to find pictures of this set up
in my manuals and books.

Therefore, the swinging arm takes up the space between the thin distance piece
and the 36mm nut?

John
 
It is what used to be called a quickly detachable hub, the idea is the wheel can be removed without disturbing the chain. So from the left, pressed steel air deflector, threaded stub axle, bearing, spacer, bearing, lipped washer, chain adjuster on swing arm end, big nut.


  Keith
 
Tell us more about this unscrupulous restorer. (without naming names, certain folk get uppity if you discuss them here)
 
First question...how tight should the bearing be against the spacer?
Click to expand...

With the bearings seated on their shoulders and spacer fitted, bolt tight against the bearings using the stub axle and an appropriate spacer - make sure bearings can spin absolutely freely (same resistance of seals  of course) - then you will know that a serious problem of bearing failure will not happen. - Regards - Phil
 
I will tell my tale of woe by relating just the facts as I best I can and let the
readers make their own judgement.

I originally found the restorer on the internet and we spoke several times on the phone
discussing the work and prices.  He was located in the upper mid west of the U.S. and
a previous Laverda 3C owner.  I have seen old posts on this forum written by him.

I mailed him both wheels and the brake plate for disassembling,
cleaning, polishing, re-spoke and truing.  The brakes shoes were to be relined.
I also authorized a few hundred dollars charge to my credit card for parts, supplies and what not.

Several months past and I did not hear form him.  I contacted him by both phone and e-mail and
his reply was he went on vacation.  He also reiterated that he takes his time and will not rush
the job.  I would be happy with the results.

A few more months past and I learned he moved his shop to another state in the mid west.  My
wheels had become lost in the many boxes required of the move.  Later still, he found the boxes
but there were shipping problems.  The shipping company kept returning them to his shop!
I asked for a shipping receipt and he never produced one. 

I took legal action and filed a small claims complaint against him.  This was difficult as I live in
another state.  By the time the claim came to be served, he had closed his shop and moved again.
My representatives said it would be trouble tracking him down and filing a compliant in a second state.

He had moved to another state in the central U.S. and is an expert at restoring Vincent's. 
These are the facts of the situation.  I never received my wheels and I was never repaid the
initial credit card charge. 

He was written up in Classic Bike magazine (UK) this past year and I got sick to my stomach reading the
article....(true fact).


I apologize if I violated any forum rules.  Let me know and I will amend my post.

John

 
John, a sad tale indeed.
I have a rough idea who it is as I saw an article a few years ago on a hippy Vincent restorer, can't remember the name, don't want to know.

I use forum members usually, but I also have old sources I use as well, with over 30 years dealing with them.
I also go sometimes by recommendation, like Eldorado seat covers in Oz. (the best I have found)
Hope you get/got the wheels replaced in the end.
 
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