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fuel injector fitting on high pressure side of pump is leaking. it is the line going to cylinder closest to firewall. always a small problem which was solved by putting a wrench on it. today the wrench made it worse and worse. I think it is the o ring on the nipple like fitting which connects the injector pump to the high pressure line. I am hoping tommy reads this and tells me he has the parts!!!!!!!!!
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I agree with Bob, the hard line from the pump to the injector has ferrules made onto the hard line
We do have the replacement hard lines, give us a call tomorrow 979-865-4002 we will get you fixed up
Tommy
Affordable Tractor Sales
“Your Jinma Parts Superstore”
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no the leak is definitely coming from below the hard line/ferrule/nut point. it is coming from the injector housing side of the nut below the ferrule nut. when I took it off it reminded me of a close nipple, one end received the ferrule the other went over something that looked like a spring plunger and there was something which to me looked like an o ring I will try to post a picture
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no need to shout, there is a black rubber ring shaped item above the threads which screw into the fuel injector pump body. it may not seal anything but i would not know what to call it but an o ring. i will post a pic when i get home tonight, maybe we are not talking about the same part. i assure you it is not the fuel line, when the engine was running i blew away all fluid with my compressor and could clearly see the fuel seeping from the junction of the barrel assembly/injector pump housing.
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once again sorry for the rotation, not sure what controls that. the leak is from the larger thread end. I ordered o rings from McMaster carr and am considering some permatex form a gasket #3 for the threads. curious to hear what those with lots more time doing this than me have to say
thanks
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Not sure what happened to my post, but I asked if the other lines had that “rubber ring” also.
What you have there in your pic is the check valve assembly that goes between the barrel and the injector line. Not all injection pump assemblies are made this way. What yours would require in that application (if it is an O-ring, it should be captured) is either a copper or aluminum washer that can be crushed. Check and see what the other lines have.
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I just fixed a couple months ago a john deere 655 (yanmar) I think that was the model with the same set up on the valve .He had overheated the engine and I think that made those o rings brittle so they started weeping .In the bottom of the hole that those valves came from there should be a copper compression sealing washer,that I think is the main seal to prevent leaks the o ring must take care of a lower pressure flow. replace all with the sealing parts with new ones replacing just the o rings might not take care of the leak,I know this by trying not to replace the copper sealing washers,I would try a diesel injector shop for the parts if they are not on a parts breakdown you have. lube the o ring with just diesel.
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I had the same problem on my 07 284 I just changed that little oring on the check valve that that you removed from the top of your injection pump. I had a metric oring kit I bought from Harbor Freight I matched one up from the kit installed it on the check valve lubed it up with diesel fuel screwed it back into the pump leak went away that was 2 years ago and that was many hours ago. I wouldn't change the whole pump it not necessary.
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I got some rings from mc master carr. not sure they are quite big enough. I measured the old one with my caliper and though I was ok. got 15mmx1.5mm. looks like I should have got the 15.5mm by 1.6mm as the problem is still there. any thoughts about permatex #3 formagasket. read some stuff about using thread sealer and potential for down stream problems/clogs. especially with tape sealers, but they are recommended in much of what I have read and by my cousin a 30 year diesel mechanic with the mta here on long island
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I would NEVER use form-a-gasket or anything like it to fix a fuel leak. A general rule of thumb, if it didn't come from the factory with it, don't use it. Me personally, I would follow chichi's advise. A 397 piece Harbor Freight metric o ring kit is all of $7.49. It has all the sizes for the loader valves, and if it has one for chichi's check valve, it most likely has one for your check valve. How did your old o-ring look? If a new one the correct size doesn't fix the problem, something else is the problem and hookim pucky in a tube isn't going to be a safe fix.
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sorry to beat this dead horse, but new development this am. went out to the garage to fire up and check for leaks. before starting checked engine oil, it was fine. checked injector pump oil and as soon as I pulled the dip stick oil began flowing out hard to say how much but several ounces. put the dip stick back in to stop flow and fired up the tractor let it run and checked again, still flowing out when dipstick pulled this time just let it run another ounce or 2. to a syringe and tube and sucked out 2 ounces till when the dip stick was put in the level was between the marks. hard to say for sure but had to be 4-6 ounces which came out total. seems to be straight compressor oil, not mixed with diesel or engine oil. all I have taken apart is the hard fuel line connection and the check valve body on one cylinder.
any thoughts, thanks
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yesterday I drained and refilled the injector pump with iso 100 compressor oil when I drained the pump counting what initially overflowed plus amount drained total was prob 10-12 ounces. so far no overflow has occurred this time I did carefully measure what I put in very close to 6 ounces total to come up to halfway on the little dip stick
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Well, compressor oil is not the same as engine oil regardless of the similarities in viscosity, but I'm not going to debate that here.
There is no way your pump can make compressor oil. Plain and simple, you have a badly leaking barrel and plunger assembly. If you were to analyze your injector pump oil you would find it highly diluted with diesel fuel. So we are back to square one. One test you can perform to confirm this overnight leakage is to shut off the fuel valve at the tank and see if it happens again.
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Here is a cutaway view of a barrel and plunger assembly so you can see what your problem is.
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