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2012 Jinma 284, 60hrs: This tractor has always started reliably. After being parked for approx two months, I started it today. As usual, it cranked and started right away. However, the engine would only idle and did not advance when moving the throttle. After a couple of minutes the engine began to run rough and I noticed the fuel indicator was on empty. I shut down the engine and refueled with fresh diesel. I then attempted to start the engine but it would not. It cranks over with plenty of power but it doesn’t even attempt to start. While cranking there is gray/blue smoke coming from the exhaust. I suspect a fuel system issue but don’t want to aimlessly start tearing into it. My diesel knowledge is limited. Hoping someone can provide some methodical troubleshooting guidance. Thanks.
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Was the tank truly empty? If so, you may have gotten air into the lines.
Have you ever bled the fuel system? It is pretty easy to do.
If it were me, I would start at the tank. If there is a sediment bowl, check to make sure it is clean (including the fine screen that most of them have) and that there is adequate fuel flow. Next, go to the injection pump and look for the bleeder screw. It usually has a ring in it. You loosen the screw and use the hand pump to pump fuel until there are no more bubbles coming out, then tighten the bleeder screw.
Other potential problems include, plugged secondary fuel filter and air in the injection lines between the pump and the injectors. The best way to check the lines is to crack the nut at the injectors loose enough for them to spit fuel when you crank the engine. Again bleeding the air out. Do one injector at a time until all the air is gone. It should start easily then.
Another potential issue is “diesel bugs”. This is a bacteria that lives in the interface between water in the system and the diesel fuel. This can be a really nasty thing to have to deal with and can be quite damaging to the system as the dead bacteria sinks to the bottom and plugs up filters. It is also quite corrosive and can damage metal components. The main point is to keep all moisture out of the system. One of the main causes is leaving a tank that is not completely full. Thermal expansion/contraction draws in outside air and condenses the moisture into the fuel.
Hopefully a quick bleed of the system will take care or your tractor.
Let us know if you have any questions.
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some of these tractors have a screen inside the tank, so when you take the fuel line loose at the shut off valve and open it if you do not have good flow from the tank it could be a screen in the tank and the tank should be pumped out before you try to clean it. it would be pretty messy to try to catch it in a bucket, and remember to inspect fuel for water and any trash.
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