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jinma 254 injector pump problem

Forum Forums Tractor Troubleshooting jinma 254 injector pump problem

This topic contains 2 replies, has 3 voices, and was last updated by  DavidPrivett 5 days, 10 hours ago.

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  • #47081

    dogdoc
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    Been a while since I posted. Having issues with 254 tractor. Progressively for several months has been reving/racing the rpm and idle has been poor. Been getting worse. This trip tractor starts then races to 3000 rpm and I have to shut down quick. Then wont start at all. If I put a little starting fluid in air intake I can get it to start with some difficulty and have little control of rpm level and it does not respond to throttle position. After warming up some it does run better and I do have better control of rpm. I noticed that the fluid level in the injector dip stick tube is at the very top and it does seem to have a diesel odor. When the tractor is running this fluid is sucked in and the dip stick tube is empty. Any advice would be greatly appreciated.
    thanks

  • #47084
    Bob Rooks
    Bob Rooks
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    ULS diesel fuel has relatively poor lubricating properties since most of the sulfur has been removed making it even more important to change the oil in your fuel injection pump/governor assembly on a more timely basis. It’s very likely that you have run some dirty/moist fuel and it has corroded the barrel and plunger assemblies allowing them to leak by into the sump. When the sump level goes down after it’s started indicates that the level is above the governor flyweights and is being thrown about inside the housing. This isn’t good as it adds additional side loading to the flyweights and makes them less responsive to load/throttle changes.

    My advice is to change the oil in the injection pump/governor right away using the same oil as in the engine, and to monitor it closely. Shut off the fuel valve at the tank after every use

    Yuchai dozer, Mustang skid steer, Mitsubishi mini-ex, Dual Dozer w/twin laser receivers, '50 Ford COE transit mixer.

  • #47085

    DavidPrivett
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    If you are not familiar with diesel injection systems find a mech. I would not start it as 3000 rpm it could go bang, clank and quiet and possibly hurt you, run away condition not good . but I thinkĀ  you need a injector pump. I do not believe anyone rebuilds them here. And most likely a oil change too. Others will crime in.

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