A65 sludge trap thread.

[Mike Farmer]

 

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

Thanks

Mike

[AWJDThumper]

Are you referring to the plug or the locating bolt?

[JulianS]

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.

[A10 JWO]

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 

[Jackson]

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.

[ChrisG]

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.

[Mike Farmer]

 

Thanks guys. Lots of good info.

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

Mike

[Bess]

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...