Author Topic: Tank center bolt  (Read 728 times)

Offline vwphillips

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Tank center bolt
« on: 20.07. 2014 17:08 »
1959 A7 SS
I have fitted a new head gasket ang started the bike but

I am having trouble fitting the tank center bolt


at the moment I have a set screw (with 24mm thread + washer) which passes though the tank into a theaded boss on the frame
 

Looing at the illistations at the https://www.draganfly.co.uk/index.php/bsa/bsa/a710--b3133--c101112--m202133/category/958-petrol-tank-mountings

it indicates a center bolt(looks longer than mine) and center bolt rubbers

It also lists a tank bolt socket 42-4078, it that the  theaded boss on the frame or does it go into it

Please advise what should be fitted.
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Offline Beezageezauk

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Re: Tank center bolt
« Reply #1 on: 20.07. 2014 19:31 »
Hi there, 

Is the centre bolt and associated fittings the same that were on the bike when you removed that fuel tank? 

If so, there should be no reason why they shouldn't go back together unless there was a damaged thread.


Beezageezauk.
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Offline chaterlea25

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Re: Tank center bolt
« Reply #2 on: 20.07. 2014 21:53 »
Hi VW,
Yes 42-4078 is the stub threaded into the frame
Rubber, 42-8012 goes over the tank bolt which is a special shouldered bolt,
it  prevents overcompression of the rubber
The square rubber pads 42- 8049/51 in the link are taped to the frame to isolate the tank from vibration
42-8052 rubbers are fitted to the frame to prevent tank roll

HTH
John
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1963 RGS (ongoing)

Offline vwphillips

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Re: Tank center bolt
« Reply #3 on: 21.07. 2014 14:02 »
Thanks chaterlea25
I have only had the bike 9 months and only had the tank off twice

I only have one setscrew which is only just long enough and may have damaged the thread

I have ordered the new parts from Dragonfly and can only hope the tread in the frame boss is good enough
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Offline Topdad

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Re: Tank center bolt
« Reply #4 on: 21.07. 2014 16:53 »
Sure it will be okay when I picked my frame up it had bee outside for 3 mths the socket was full of crap and rust but a clean up and a couple of run throughs with the bolt bingo sorted best of luck, BobH.
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