Lotus Elan

Brake servo mount bobbin

PostPost by: TonyA » Sun Nov 20, 2022 7:16 pm

One of the four 1/4 inch unf bobbins which secure the brake servo mounting plate to the inner wing has come adrift in what seems to be a shallow void between the inner wing and the wheel srch. What are the dimensions of this type of bobbin..what diameter hole do I have to make to fish it out and glass in a replacement..Thx.
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PostPost by: alan.barker » Mon Nov 21, 2022 5:06 am

Hi Tony,
Are you sure it's unf. I think it would be unc.
Don't forget when you fish it out you can Helicoil the thread.
To rebond you will need a hole much bigger than the Bobbine. So you can enlarge the hole a lot to fish it out.
Alan
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PostPost by: TonyA » Mon Nov 21, 2022 11:50 am

Thx Alan, you are right of course it's 1/4 inch. Pls tell me approximate size of the bobbin.so I have some idea of what I'm trying to fish out .It's my first bobbin excavation and I'm nervous..! Tony
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PostPost by: Bud English » Mon Nov 21, 2022 9:27 pm

From r.dent: https://www.rdent.com/
Bobbins
Replacement cast aluminum bobbins in original oblong shape and size. Approximately 1-3/8" long x 13/16" wide x 11/16" high. Blank bobbins can be easily drilled and tapped as needed.
Ref. 36B1999
Bud
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