BSA Owners' Club Forum

The BSA Workshop => Singles => Topic started by: Phil C on 12 June, 2021, 14:25:29

Title: Petrol filter
Post by: Phil C on 12 June, 2021, 14:25:29
Hello all, Just fitting the fuel tap back into the tank (1965 B40F) (see photo) when the filter fell off the fitting. What's the best way of securing it? Araldite?   Phil
Title: Re: Petrol filter
Post by: Dean Southall on 12 June, 2021, 18:12:24
Solder
Title: Re: Petrol filter
Post by: BEESY on 12 June, 2021, 20:33:29
A new one? I'd be worried that any fix I did would come loose.

Title: Re: Petrol filter
Post by: DAVE BRADY on 12 June, 2021, 21:23:24
Hi,

Aren't these meant to be just a push fit so that they can be replaced if needed?   Super glue is not suitable but something like JB Weld or Plastic Metal would do.

Dave.
Title: Re: Petrol filter
Post by: AdrianS on 13 June, 2021, 07:57:20
When I replaced one or was just a friction fit so I used nothing to “glue” it in.
If the replacement is loose, then I would probably stretch the base with some needle nosed pliers to expand it to fit. I can see my filter when looking through the filler cap to check it is still in place.
Title: Re: Petrol filter
Post by: Dean Southall on 13 June, 2021, 10:21:27
you will probably see the trace of original solder if its old enough
I always solder, apart from anything else its ethanol proof!
Newer style weren;t soldered
Title: Re: Petrol filter
Post by: Phil C on 13 June, 2021, 10:50:29
So I take it Araldite is not suitable?

Any disadvantages to soft soldering it?

Phil
Title: Re: Petrol filter
Post by: Phil C on 13 June, 2021, 13:49:59
Actually, looking closely at the filter(see photo) it looks like there has been some kind of adhesive used in the past. There appear to be the remnants of it on the end 1/8 inch or so, and also along its length, presumably at a seam. So I am a bit tempted to use some kind of glue. Maybe Steelstik? Of course doing that would mean removing the old stuff off the end - not sure what would do that, maybe carb cleaner?   Any further thoughts please anyone?  Phil
Title: Re: Petrol filter
Post by: Bess on 13 June, 2021, 17:34:53
Hi Phil,
          Personally I would solder it.

Tin the end of the gauze and the inner edge of the tap first, whilst there's still heat in the tap offer them up in the position you are most happy with, heat and add some solder as the fuse together.

Best wishes...
Title: Re: Petrol filter
Post by: DAVE BRADY on 13 June, 2021, 17:40:41
Hi,

 Does this tap have a nylon or neoprene insert?  Will it melt?

Dave.
Title: Re: Petrol filter
Post by: Bess on 13 June, 2021, 17:42:36
Hi Dave,
              Looks like a removable brass reducing bush.

Best wishes...
Title: Re: Petrol filter
Post by: Phil C on 13 June, 2021, 17:46:06
I like the idea of solder. Trouble is my little iron might not provide enough heat for the tap, not sure. A flame would be ideal I guess, but I don't have one.

 I don't see any nylon or neoprene inserts.

What's a removable brass reducing bush?

Phil
Title: Re: Petrol filter
Post by: Bess on 13 June, 2021, 17:51:54
Hi Phil,

https://uk.rs-online.com/web/p/brass-bronze-threaded-fittings/0439947/?cm_mmc=UK-PLA-DS3A-_-google-_-CSS_UK_EN_Plumbing_%26_Pipeline_Whoop-_-Brass+%26+Bronze+Threaded+Fittings_Whoop-_-439947&matchtype=&pla-297020768591&gclid=CjwKCAjw2ZaGBhBoEiwA8pfP_g23tDYr5GLjuS-2sfc4U4RvkobnVZHSdC_mteC076fDnAHpPpCdjhoC2z0QAvD_BwE&gclsrc=aw.ds

If you don't have a gas torch you wont be able to solder them, if you can afford it its worth investing in one of these:

https://www.amazon.co.uk/s?k=mapp+gas+torch&adgrpid=53462168552&gclid=CjwKCAjw2ZaGBhBoEiwA8pfP_mtDTjh1Gnf4iVsu6RblXAqsmgrU4q0-vZ309J7vs0l3NzyBjAm8txoCJsoQAvD_BwE&hvadid=259073365666&hvdev=c&hvlocphy=1006953&hvnetw=g&hvqmt=e&hvrand=3031528936104861463&hvtargid=kwd-303839639513&hydadcr=29384_1792348&tag=googhydr-21&ref=pd_sl_6ykzrbw6zf_e

It produces enough heat to silver solder so you can join stainless and if you're inclined replumb the house  :)


Best wishes...
Title: Re: Petrol filter
Post by: Phil C on 14 June, 2021, 11:17:49
Thanks Bess. Ordered.   Phil
Title: Re: Petrol filter
Post by: Phil C on 16 June, 2021, 13:34:29
Update: I got a torch (thanks again Bess) and soft-soldered the filter to the tap. It was quite tricky, for example because the fine copper mesh is capable of taking much less heat than the relatively bulky tap. Anyway, I think it's okay? Not pretty, I know, but hopefully it will work. Please see photos. I'd appreciate any thoughts (and I promise I won't be offended!)     Phil
Title: Re: Petrol filter
Post by: idie on 16 June, 2021, 14:38:01
I think you made a good job of it. From doing mine I know how difficult it can be.
Title: Re: Petrol filter
Post by: Phil C on 16 June, 2021, 19:50:51
Actually I now notice a couple of small pin-holes in the solder. Don't know how deep they are but I guess assume the worst. Maybe I'll smooth a thin layer of JBWeld Steelstik over the top of the solder? Comments anyone?  Phil
Title: Re: Petrol filter
Post by: Mike Farmer on 16 June, 2021, 20:30:04
 :) :) :)

I used fast Araldite and as yes have not had a problem. Tho in truth I favour new taps.

Mike 8) 8) 8) 8)
Title: Re: Petrol filter
Post by: idie on 16 June, 2021, 20:41:45
About 30 years ago I sealed some quite large holes in my Velocette petrol tank using Araldite and have had no leaks.
Title: Re: Petrol filter
Post by: Mike40M on 16 June, 2021, 21:04:32
If the pin holes are as small as the filter mesh, just let it be. One thing is certain, not polyester. Had an at least 30 year old quick fix with that on my Manx Norton that started to leak.
Title: Re: Petrol filter
Post by: Phil C on 16 June, 2021, 21:30:10
Might try melting the solder again.
Title: Re: Petrol filter
Post by: Phil C on 16 June, 2021, 22:02:02
But then if memory serves, at least when welding, once you've got pin holes they take a lot of getting rid of without starting afresh. Might be different with solder, can't remember.  Phil
Title: Re: Petrol filter
Post by: Mike40M on 16 June, 2021, 22:22:17
Impurities are cause of pinholes. Usually.
Title: Re: Petrol filter
Post by: Phil C on 17 June, 2021, 15:54:22
No pin holes this time. Heated it again, bit of flux, bit of solder, made sure heated full circumference. Thanks again all.  Phil