rustystud
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I'm not going to say I was driving by the end of the 1960's. I'm just saying I'm not gonna tell.
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Its a 'Boss fitting', we use them a lot with hydraulics.I posted earlier that I'm sure the threads are a straight thread NPT . The military never used any Metric fittings that I have ever seen in these years. I was a maintenance mechanic in the Marines (after a lateral move from Tanks) and never used a metric wrench or socket or metric anything. What has probably happened is that the Metric threads are close enough to fit, just like a 11mm is 7/16" , 13mm is 1/2" and a 19mm is 3/4" .
I just started my flame heater delete project today. I was armed with the M18 (spark plug) and M20 (Fluid Restrictor) plugs, but as Jeepsinker said, it seems the M20 plug is too small. No amount of Teflon tape would help this plug, had I used it. I could pull the M20 plug out by wiggling it back and forth - without turning it. I am going to bring the Fluid Restrictor I pulled out over to Fastenal tomorrow morning and have them tell me what size the replacement plug needs to be. I hope Fastenal has the plug in stock, or we can make one from a bolt they have in stock. I'll report back if we can figure out the correct size.Well, the 18mm plug fits nicely, but the 20mm plug is most certainly NOT the right plug. It works, but fits so loose that it could easily pull threads out of the manifold. It worries me.
Maybe try something that's 13/16?Ok, I just heard back from my local machine shop on this plug (Ickler in St. Cloud, MN). I dropped off the actual fuel nozzle/fluid restrictor (Item #25 in Fig. #27 "Flame Heater and Related Parts" from TM 9-2320-361-24P) and they measured it up. It is a 20.5 mm with a thread pitch of 1.25. Good luck finding that! If you don't want to weld this shut, you are looking at making the world's most expensive plug - because there is no die for a 20.5 mm bolt/plug with 1.25 pitch. Alternatively, you can do what Lieutenant Dan said - just plug the fuel ports in the fuel nozzle/fluid restrictor.
I plan on deleting mine in the next couple of months. I'll try to salvage what I can, but had tossed the idea of re-using some of the parts as mentioned in post #92 on this thread.I am looking for a complete flame heater set up if there is any one that has plans on removing theirs, I live up where we get so cold weather and the deuce that I just purchased does not have one and is giving me trouble starting. my engine is a LDT 365-1D. maybe if I had one to install it would start a lot easier. thank you
I don't suppose you have any updated information or pics?As another solution, instead of needing a plug.
I cut off the end of the insert, drilled it out, pressed in a plug so I could make the hole smaller, and used it as the port for my boost sensor.
This is the only pic I could find.
View attachment 580293
I know I had an issue with one of those lines. I ended up keeping the fitting and put a new nut/ferrule on it, then put a piece of 1/4" brass rod in there to use as my plug. Its not ideal but it works and its what I had on hand at the time.Did any of you guys have any issues removing the line from the IP?! I got the first line removed with the nylon hose and ferrule attached but the brass nut it was going into to put a plug in the IP is being a major PIA...any ideas?'
I know I had an issue with one of those lines. I ended up keeping the fitting and put a new nut/ferrule on it, then put a piece of 1/4" brass rod in there to use as my plug. Its not ideal but it works and its what I had on hand at the time.
Some of the fuel fittings on these trucks are near impossible to get off!
Here is a link to someone who had an issue with a different fuel fitting and how he got it off... maybe it will help: http://www.steelsoldiers.com/showth...-to-my-deuce&p=1669857&viewfull=1#post1669857