Non running 1512

[Tacosteelersman]

Yes all filters and fuel line replaced screen in tank cleaned. I have been tryin to start it quite a bit, Battery cables and battery are new I have had jumper cables hooked up to keep the battery up. The air filter is brand new and air inlet clear of debris. The starter is factory and not really sufficient. I am also thinking about the injectors.

I unhooked the metal lines from the high pressure pump to injectors. For the heck of it I turned the engine over and two ports let fuel flow out but the port all the way to the front does not seem to be moving no where near as much fuel. Can the pump fail in this way? Are these pumps rebuildable?

[Tacosteelersman]

Ok I found that the nut on the pump must have loosened when I took the fuel line off I tightened it and have equal flow out of each port now.

So I'm looking for a good how to on cleaning diesel injectors for idiots. I am mechanically inclined but not fimilar with diesels.

[Tacosteelersman]

Ok I ripped the injectors out and I am keeping them in order. I have to say they are horrible. I'm going to say my problem is right in my hands. Did I get pics? Of course.

[Tacosteelersman]

They all looked this um good. Lol.

So here is a pic looking down into the cylinder notice the debris around the injector hole.

[Tacosteelersman]

I took all the injectors out and turned the engine over, it looked like a volcano erupted.


So here's a pic of the cylinders after turning the engine over for a few seconds.

[Tacosteelersman]

Sorry for the multiple posts but I have not figured out the art of multi pics on one post yet.

This is a pic of all the injectors together little better lighting. All 3 are dirty but the one all the way to the left is badly caked and crispy.

[J-Mech]

You say the injectors "look horrible". If your talking about the black carbon on them, that's normal. You can't tell anything just by pulling an injector an looking at it. It's not a spark plug.

Since you have them out, why not just send them off and get them rebuilt. NO, before you ask, you cannot do that yourself. Might as well pull the pump and have it rebuilt too. Pull the head and rebuild it. Maybe do a compression check, before you pull the head. The motor may just be worn out. Would probably be easier to do a compression check through the GP holes with the injectors in. Did you ever try giving it a snort of either just to see if it would start? You didn't answer the question as to whether anyone has had the pump out of the box or not? Maybe someone had it out and didn't put all the shims back in. Or coated it with silicone like I see all the time.

[J-Mech]

Here's the deal:

You have an indirect injected diesel that won't start. Here's a list of possible problems:

*Not cranking fast enough
*Glow plugs not working (I think you eliminated that, but you could still have a bad plug)
*Injector is worn out not giving a good enough atomization of the fuel
*Injection pump is worn out. Not delivering high enough pressure.
*Injection timing could be off
*Blown head gasket (low compression)
*Wore out valves (low compression)
*Wore out cylinders (low compression)

Before you took the injectors out, I think I would have pulled and checked to be sure all glow plugs are in fact good and working. (Just hook them up to a battery with a couple of test leads. Make sure not to touch them, they get hot FAST. Or ohm them out.) If your confident they are working. Then, either give it a snort of either and see if it takes off. DO NOT heat the glow plugs before either. Just a quick shot and see if it attempts to start. If your starter isn't cranking it fast enough, it may fire right off. No matter the outcome of the either, I'd do a compression check. Just to see what shape the motor is in. From there, I'd rebuild if necessary. If it's in good shape, new pump and injectors. Really shouldn't take more than an hour or two to figure out why this won't start. Fuel, air and fire (compression) is all it needs to run. Figure out which one it isn't getting. Sounds like air is taken care of. You say it's blowing smoke when cranking, so it is at least getting some kind of fuel. It may not be atomized good enough, so that may be the issue. Or it could be injecting at the wrong time. Fire: Check the compression. If it has good compression, then it's definitely in the fuel system.

[Tacosteelersman]

Yup your right I pulled them out, right again I don't know what I'm doing with diesels. I am judging horrible by the amount of carbon and debris that's built up surrounding the nipple on the bottom of the injector. Listen, do you know how I learned to fix things? I tear things appart and learn from experience. Am I going to screw this injector up by tearing it appart and hosing it down inside and out with brake clean? Probally, but I will learn a lesson either way. I'm not gonna buy a non running 1985 tractor to look at, I also did not buy it cause it's all I could afford. I bought it to learn more about diesels and try to better understand the trouble shooting part of diagnosis on a Diesel engine. Will I send it out to be rebuilt? Yes I will if I have to. Or buy new. Will I pull the pump and have it rebuilt? Yes if I have to. Or buy new. But before that happens I will tear it appart and learn better what makes it work. I will clean the injectors best I can and do a pressure test on them to find out what pressure they open, what the spray pattern is, and if they leak under pressure. But that's before I reinstall them, then I will move on to a compression check, possibally a leak down test before I touch the head on this engine. Yes I did give it a quick shot of ether with the old glow plugs in, no change except it rolled over harder.
You obviously have a lot more experience than I do with these engines, but how did you get experience? You tore stuff appart and learned.





The needle was gummed inside the injector to the point I had to work it out of there with brake clean and moving it back and forth. The video and info I have gathered seems to point to that needle having free movement with the injector disassembled. I will disassemble all these injectors and brake clean every hole and orfice I can get to. Then put them back together

If you can't appreciete the efforts of a person trying to do the best they can and learning then you and I will not see eye to eye on this matter. But don't get obnoxious with me while I am trying to figure this stuff out.

[Tacosteelersman]

I appreciate your last post. That does help me quite a bit. Excuse the mild rant above.
But just know this I am trying to do the right things here.

BTW I have no previous records of any kind on this tractor PO was no help. I did not tear the pump appart YET.