Type of fitting on vacuum hose to distributor??

turnrjr · #1 (**permalink**) 11-01-2009, 11:12 AM

I am trying to make a new vacuum line from the carb to the vacuum advance on a rebuilt distributor on my 1954 223 six. The connection to the diaphram on the distributor is different than the old one. The male fitting on the old tubing is unlike anything I have seen. It is brass with a tapered end thru which th 3/16 steel tube sticks out about 1/8". I also tried a double flared brake type connection on the 3/16 tube. The fitting threads in ok but the tubing won't tighten up in the fitting. What type of special fitting do I need? Thanks
Bob

Old F1 · #2 (**permalink**) 11-01-2009, 12:12 PM

So if I’m reading this right, you have a rebuilt distributor that has a different fitting on it then what you had and the old line has a tapered brass nut on it? Would a piece of vacuum hose go on to the dist. fitting? If my old and frail memory works the nut was called “ford nut” by weatherhead and is special Dist. nut with no female companion as far as I know(not so sure). As is used in latter models, could you cut off the nut and join the dist to the old line with vacuum hose?

Old F1 · #3 (**permalink**) 11-01-2009, 01:03 PM

Or could you switch the vacuum advance off your old dist, kina defeating part of the reason for changing though.

distributor.jpg

ALBUQ F-1 · #4 (**permalink**) 11-01-2009, 05:05 PM

Quote:

Originally Posted by Old F1

So if I’m reading this right, you have a rebuilt distributor that has a different fitting on it then what you had and the old line has a tapered brass nut on it? Would a piece of vacuum hose go on to the dist. fitting? If my old and frail memory works the nut was called “ford nut” by weatherhead and is special Dist. nut with no female companion as far as I know(not so sure). As is used in latter models, could you cut off the nut and join the dist to the old line with vacuum hose?

Thanks for the lead on that nut, the one at the carb on mine is similar sounding and it won't tighten up. They look like a squashed and tapered compression ferrule.

Old F1 · #5 (**permalink**) 11-01-2009, 07:06 PM

Quote:

Originally Posted by ALBUQ F-1

Thanks for the lead on that nut, the one at the carb on mine is similar sounding and it won't tighten up. They look like a squashed and tapered compression ferrule.

Yep, but as I told you my memory was suspect, and I kina mis-spoke, it looks like the ford nut is only for ¼ line but the 3/16 with the ferrule built in is another number.

Sorry for the poor picture but all I could find was a pdf picture and mega challenged to get into a copy-able file.

ford nut (464 x 600).jpg

Old F1 · #6 (**permalink**) 11-01-2009, 07:19 PM

ford nut (2550 x 3300).jpg

turnrjr · #7 (**permalink**) 11-02-2009, 03:11 AM

OldF1 thats it. The lead end is deformed though. Kinda funnel shaped probably from being torqued many times. Seems odd that these aren't more common. The diaphram on the rebuilt distributor is new. I would think the manufacturer would use a design to accept an "off the shelf" fitting. I'll keep looking. The threads are 3/8"-24. I could gas weld a short piece of 3/16" tube into a tube nut and then put thread sealant on the nut. Then as you said, use a short piece of vacume hose for a splice. It will look kinda funky.

ALBUQ F-1 · #8 (**permalink**) 11-02-2009, 08:32 AM

Great info! Where did you get the picture? Is it from someone who sells them?

Old F1 · #9 (**permalink**) 11-02-2009, 10:52 AM

Quote:

Originally Posted by turnrjr

The threads are 3/8"-24.

Are you sure, 3/8 pipe thread (tapered) is 3/8 – 18 might seal (teflon / jb weld) with a threaded hose nipple, (see pic) if it is straight thread it would need a flange and gasket to seal wouldn’t?

Quote:

Originally Posted by ALBUQ F-1

Great info! Where did you get the picture? Is it from someone who sells them?

Weatherhead Brass, division of Eaton I think, any major auto parts / industrial / truck supply store.

hose nipple.jpg

fixnair · #10 (**permalink**) 11-03-2009, 11:16 AM

Old F1, the upper image in post # 6 looks alot like the imperial Eastman part # 81 LB 04, 1/4" tubing nut (breakoff style) They make a 3/16" also. Same part number only substitute #3 for #4. (81 LB 03). I think Parker Hannifin bought out imperial several years ago and the new number may be 61 HD 03. Any good hydraulic or pneumatic house would probably come up with the right fitting.