Type of fitting on vacuum hose to distributor??
#1
Type of fitting on vacuum hose to distributor??
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
Bob
#2
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?
Last edited by Old F1; 11-01-2009 at 12:06 PM. Reason: not so sure
#4
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?
#5
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
#7
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.
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#8
#9
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?
Weatherhead Brass, division of Eaton I think, any major auto parts / industrial / truck supply store.
hose nipple.jpg
hose nipple.jpg
#10
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.
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Ken Blythen
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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02-28-2011 09:15 AM