Sat Nov 19, 2022 2:47 am

Enthusiast
66' VBC1T
Joined: 12 Aug 2021
Posts: 75
Location: WGS 84
 
Enthusiast
66' VBC1T
Joined: 12 Aug 2021
Posts: 75
Location: WGS 84
Sat Nov 19, 2022 2:47 am linkquote
Do guys ever replaced the bearing brass seat? Is it worth to replace? Just to make sure the bearing will sit at the best condition



Sat Nov 19, 2022 11:19 am

bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: 26 Sep 2013
Posts: 6565
Location: So Cal
 
bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: 26 Sep 2013
Posts: 6565
Location: So Cal
Sat Nov 19, 2022 11:19 am linkquote
I think charlieman tackled this somewhere around page 78 or 79 ...

Vintage vespa with sidecar (**Now In Technicolor ! **)
Sat Nov 19, 2022 2:58 pm

Ossessionato
62 VBB1T Round Tail W/ leaner sidecar
Joined: 26 Jan 2019
Posts: 3284
Location: california
 
Ossessionato
62 VBB1T Round Tail W/ leaner sidecar
Joined: 26 Jan 2019
Posts: 3284
Location: california
Sat Nov 19, 2022 2:58 pm linkquote
I got a little carried away on mine...
If you don't plan to buy a mill, and a lathe, and teach yourself to machine, and weld, then there are simpler solutions.
And simple is good.

At issue: if that bronze ring moves (as your's clearly has...) it's bad.
You can put it back in - but without any treatment - you may find that it fails when you install your main bearing.

Making this tougher: when you heat the cases to allow your cold bearing to fit - the bronze ring will loosen and move.

Here is a trick.
Instead of installing the bronze ring back in place, then the bearing, do it this way:
Install the bronze ring perfectly on your bearing outside the motor.
Do it on a hard very flat surface so you know you have it flush and perfectly square.

Now heat the cases as you normally would - and chill the bearing WITH the brass ring on it.
To keep it dry - put it in a sealed bag - but put that bag in the freezer.
Get some "retaining compound" from loc-tite.
Put it on the outside of the bronze bearing just prior to insertion to the heated aluminum case.
Use something large enough that presses the bronze bearing and the main bearing in one push (that is - don't just push on the bearing as it will unseat from the bronze.

The retaining compound will help hold your bronze in place once its pressed in to the cases like this. Single press and you are done.
Hope that helps.
-CM
  DoubleGood Vespa Design  

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