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Hi everyone hopefully someone can shed some light on this problem.

I have a Lombardini 6LD360/V which was running perfectly fine until one morning when I found it was leaking diesel through the fuel line. So I removed the fuel line and fixed it. I then put it all back. The engine turned over but wouldnt stay running. I though it was probably that the system needed bleeding so I set about bleeding it when the fuel suddenly stopped coming out. I checked the fuel filter, line and tank and the diesel was still coming through.

I have established that the problem most likely lies within the injector pump because the diesel is coming through fine before the pump but not after. I removed the fuel line after the pump and turned the engine over...no fuel. I removed the fuel line before the pump and the fuel was flowing no problem..

So, what could be the problem? Can something get stuck in the pump?

I have added a picture if its any help?

I have worked on diesel trucks and construction equipment. Once air is into the system, running out of fuel, replacing filters, bad fuel lines, etc. Some engines will restart without very much problems and the next time you will be pulling you hair out trying to get them started. Start with the supply pump first when make sure all air is out to the injection pump, next bleed the injector lines at the injector pump. Now bleed all the injector lines at the injectors where they go into the head. They won't take any air in the system for a diesel not to run and you night have to do this more then once. good luck

reynoldston said:

I have worked on diesel trucks and construction equipment. Once air is into the system, running out of fuel, replacing filters, bad fuel lines, etc. Some engines will restart without very much problems and the next time you will be pulling you hair out trying to get them started. Start with the supply pump first when make sure all air is out to the injection pump, next bleed the injector lines at the injector pump. Now bleed all the injector lines at the injectors where they go into the head. They won't take any air in the system for a diesel not to run and you night have to do this more then once. good luck

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Thanks for the reply. The fuel won't get past the injector pump though...so wouldn't it be something wrong there? I checked another thread and it said it could be the injector pump rack if that means anything?

Daggerwin said:

Thanks for the reply. The fuel won't get past the injector pump though...so wouldn't it be something wrong there? I checked another thread and it said it could be the injector pump rack if that means anything?

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I really don't what system you have? If that is a picture of your injection pump it looks gear driven to me. Something with a injector rack is when each cylinder has its own pump and its like a valve rocker arm drives each pump or called a rack. The fuel is supplied to the injectors through a fuel galley made internally inside the head. GM diesels and some of the older 2 cylinder John Deere's have that system. I think you have a different system. When the fuel comes out of the injector pump its a very small amount but under real high pressure to the point if you put your finger over the port it would drive it through your finger so don't do that. First just make sure you aren't air locked and if you can't get like I said a very small amount you might have to have the pump overhauled at a shop that dose that type of work. It takes special equipment to rebuild and test the pumps.

Ok I was looking a lot closer at your pump. It could be cam or rack driven?? I would say remove it and see what drives the pump? Like I said it was large equipment I was working on, but it all works the same just different design.