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leaking diesel fitting cures??

T

Tony in Mass.

Well-known Member
ON my back from the dead MF35. This is on a heavy wall pipe from the CAV pump to the Standard's #4 injector nozzle. The compression fitting slipped off, and the bend is so close to the end, the nut can't fall away to speak of. I fooled with it enough where the brass ring is 'compressed' again, but leaks- rather a high pressure spray- straight backwards- like a firehose. JBWeld? PVC tape? Get a Continental gas engine? oh I like that idea.....
 
Tony, You will never get it to seal by applying anything to the outside of the fitting. WAY too much pressure.
Clean it up real good with Brake and Parts cleaner then look closly to see where it is leaking. Is the line cracked? Is it leaking from the copper compression rings? You will have to seal the leak in the manner it was sealed when new. Diesel high pressure lines have to seal, not just be patched.
Be careful if you choose to use teflon tape on anything. Do not get ANY inside the high pressure system. That can be, what is called in the business, a BAD thing.
 
Friend, if the line from the injector pump to the injector is bad, replace it! That is a very high pressure line. If you make your own, and I'm guessing you don't, it must be a double flared steel line. You can purchase the replacement line from a Massey dealer. It will come with a new female end fitting. I did mention that the line is extremely high pressure? If it isn't good, replace it.
 
My cheif on my first ship in the Navy use to use teflon tape on diesel lines, so I can't disrespect the practice to much, but he, and I assume you also, kept the tape off the first thread or two to prevent the fuel from eating up the tape and causing tape particles from getting in the fuel system.
 
No flares on this. The lines have copper rings, which one slipped off. The dealer said there are no replacements for the Standard engine lines anymore. It would have to be a used one off a parted out engine, or custom made in a specialty shop.
 
Use the finger nail test....drag your finger nail around the fitting- if you feel even a little snag, the line is cracked, and needs to be replaced. JB weld, tape, or other....nothing stands up to the line pressure.
 
I think I will try to take a couple close up tomorrow, so you guys can see what I am dealing with. My hunch is the ring had a certain... position? and I got it to stick again- in the wrong position. It is there, but not seated tight enough, cause I am off a few degrees? o'clocks? from where the brass? copper? ring is/ was used to. And boy I don't want to reef on it now that I got this far. Almost done with a long expensive rebuild here! This is the last pain... that I can see...
 
Tony,

I may not be picking up what you're laying down, but..

The place that I have do my injectors/pumps can and will make lines, and maybe even would have what you're looking for even though it is not available through AGCO these days.

I would recommend visiting a pump shop.. Perhaps take the line along.. and see if they can help. My local guy is pretty good about going above and beyond to help (just never say "when you got time" or "whenever you can get around to it" because you'll be really waiting.. but get a little break on price that way LOL ) and he stocks quite a bit of off the wall stuff for us old tractor guys it seems (of course, my diesels are pretty common)

Good luck.. Hope you get er doctored up.

Brad
 

Sounds as if you have a scored or cracked "banjo" fitting. If new copper washers with stud torqued to proper amount won't stop leak a new line will be required.
 
If you have found the old one you should lay emerypaper on a flat surface and gently lap each side to remove any burrs.Then clean well and install.As long as its not cracked it should work.
 
Only one way to fix this leak, get a new line!
You have a crack in the fitting or line.
Never get you hand close to the line while its leaking/spraying deisel fuel. It can blow fuel into your skin/flesh and you can lose parts of your hand, or die from it.
 
Get a new line... or get a perkins.
The flare is probably cracked or deforemed on this line. Those things are aperating at 3000 psi. Tape and goop are not going to fix it. It probably will mask the problem sufficiently that some day you'll get a finger in there and have fuel injected into your finger under pressure. Look for some pictures of hydraulic injection... then ask yourself if you want to experience that.

Rod
 
Here's the evil villian. I twisted it to where I 'thought' it would seat better... boy was I wrong! this was as close as it would focus. I tried to blow it up, can do in the camera, but on here, sorry.
a52019.jpg
 
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