broke off air tank petcock in M135.......

[Brad]

My Son, in his zeal to do good while draining moisture thought it best to remove the petcock and get rid of every last drop of water. Well we know what happened, broke off the petcock.
It is in a hard place to get at but we tried "easy outs" with no luck, the brass left in the threaded hole just keeps getting cut out. Finally we got a big steel lag bolt tight in the brass and it is holding air , and was enough for him to get the truck back to its storage location.
I might be able to just tap some threads in what is left of the brass and run a real bolt in it and seal it.
Do you think that sufficient? Otherwise I'm going to have to remove the tank so I can get at it better to remove the old brass and clear the original threads in the tank then get a new petcock??
Valued opinions please.

 

[gimpyrobb]

In the past, ive hammered in a torx bit and been able to unscrew snapped off brass. Some heat from a torch cant hurt either. Recently I've been using "inside pipe wrenches" if you have the right size, they beat everything else ive used.

 

[gimpyrobb]

https://www.homedepot.com/p/HDX-Internal-Pipe-Wrench-Set-HDX150/204218626

 

[Brad]

I am going to remove the tank to extract the broken end of the old petcock.
Would anyone there have one I could trade for or purchase?
Thanks, 724-235-1140

 

[rosco]

I'll look tomorrow, on one of my 'bones' tomorrow . In the mean time, when you get the tank out, heat the threaded part that is left on the tank to red temp, let it cool, then use your easy out. Hopefully, you didn't mess-up the threads.

 

[frank8003]

twist drills for NPT

https://www.homedepot.com/p/HDX-Internal-Pipe-Wrench-Set-HDX150/204218626

Yep that is the tool, beats most things I ever made to get out broken threaded things with hole in it.
One could use a left handed drill to get to the threads also. You just realize the hole in the broken thing is probably in the center of the threaded hole. Just left hand drill it out then re-tap it.

 

[Brad]

Thanks guys,
Plans have changed a little as usual. Probably be tomorrow till I get to that tank.
But I appreciate yer help.

 

[SCSG-G4]

Replace the petcock with one of these > https://www.ebay.com/itm/AIR-TANK-D...ghtliner-Pete-Kenworth-All-Makes/131613289387 Most truck places will have them if you don't want to use evil-bay.

 

[Brad]

WOW!! That would be great, thanks.
If the threads don't match up I could just adapt/bush it I am guessing??
Thanks again, I am going to research this