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BSA Owners' Club Workshop Discussions

The BSA Workshop => Twins => Topic started by: Mike Farmer on 09 Feb, 2018, 13:04

Title: A65 sludge trap thread.
Post by: Mike Farmer on 09 Feb, 2018, 13:04
 :)

Hi gents. What size and thread is the A65 sludge trap .

Thanks

Mike
Title: Re: A65 sludge trap thread.
Post by: AWJDThumper on 09 Feb, 2018, 13:54
Are you referring to the plug or the locating bolt?
Title: Re: A65 sludge trap thread.
Post by: JulianS on 09 Feb, 2018, 14:38
The plugs thread depends on the crank;

If 2 plugs then it is 7/8 x 11 tpi BSF.

If only one plug in then it is 7/8 x 20 tpi. I think UNF or Cycle not sure which.

The change happened around October 1964 according tothe Service bulletins.
Title: Re: A65 sludge trap thread.
Post by: A10 JWO on 09 Feb, 2018, 15:01
Great fun getting them out, two hours or two minutes if you are lucky. Some make up a home made tool for this job. Just bought a brand sludge tube from Kidderminster M/C's. Good luck  ;D
Title: Re: A65 sludge trap thread.
Post by: Jackson on 09 Feb, 2018, 15:07
One of mine (A10J came out easily. To get the other out I drilled a hole in it and used a good quality screw extractor. Came out nicely then.
Title: Re: A65 sludge trap thread.
Post by: ChrisG on 09 Feb, 2018, 16:39
I've never taken both out as the tube comes out of one end and you flush it out from there surely? Mind you, it was 12 years ago that I last took one out. One of the benefits is the new plugs have a socket head not that pathetic slot, so next time will be much easier.
Title: Re: A65 sludge trap thread.
Post by: Mike Farmer on 09 Feb, 2018, 20:44
 :)

Thanks guys. Lots of good info.

I'm not actually doing the job, just info for a friend.

Mike 8) 8)
Title: Re: A65 sludge trap thread.
Post by: Bess on 09 Feb, 2018, 22:15
Hi,
     
1962 to 1964
67-1211  7/8" 11 tpi (plain)
67-1212  7/8" 11 tpi (spigot)

1965 onwards
68-0184   7/8" 20 tpi CEI

Best wishes...
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