The tractor has no power under load, and the cylinder closet to the seat is leaking - so i'm deducing that they probably have something to do with each other, but I'm not sure. I removed the hard lines to the injectors, and I think I may have loosened something that isn't supposed to be loose.
If you removed your injector lines, and then reattached them. You first off got air in the line and you will have to purge them. But, I believe that your injector gasket was probably the culprit and why it was leaking. It sounds like the injector was losing fuel pressure and the pump was unable the push enough fuel to all the cylinders when under load.
If it were me, I would go online to HoyteTractors.com they carry every part for your Yanmar tractor that you will ever need. They also have a tech department too. Since you already have air in your lines, you might as well replace the fuel filter and O-ring and injectors seals. You can also get a service manual from Hoyte for your specific tractor model. If your Yanmar (3000) is like mine, my fuel pump is on the "passenger side" of the tractor and it has a bleed valve on it. So after you replace your parts you can bleed the air out. They are very simple machines to work on. Just in case you didnt know, most Yanmar tractors are a direct cross to John Deere Tractor Models. Any John Deere tractor under 100hp is/was Mfg. by Yanmar for 30-40 yrs or so. Good Luck!!
SOURCE: Compact diesel tractor running bad. 24.5 hp 3
some of those had like a sediment bulb with a screen it before the fuel filter they are famas for pluging up
SOURCE: no fuel to injector I have diesel to the injector pump
Is it a timed pump?
Testimonial: "even if out of timing I shoud have fuel pumping to the enjectors ,correct?"
SOURCE: Yanmar diesel engine model#3007D003 powering a 6x4 cuts off.
My thought is that it is electrical, since it will not crank. I assume you mean that it will not turn over when you turn the key. I am not certain, but I think that if you have an electrical problem it may shut off the fuel supply as well. There is probably an electrical fuel stop on that machine. Since there is no spark plugs or electrical system to make the engine run, by shorting out the electrical system it will not stop the engine.
SOURCE: I have a John Deere 2020 diesel. I can't get the fuel pump off
You need to remove the nut under the cover in front of the pump and then borrow a tool from a j.d dealership to pull the coupler off the pump,you may need the dealer to do this because they have a no lend pollicy for their special tools.Hope this helps.
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