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john deere 2305 hst

Neil B We have a john deere 2305 hst. It apparently lost power when it was warm and would not tow.
We put some diesel system cleaner in it, and now it seems like it misses and shoots out black smoke, especially on lower RPMs, it starts to miss and shoot smoke, and ideas what could be wrong with it?

Dale G. Basgall What type of fuel pump does it have on it ?
Neil B I'll try to find out.
We have 3 of these and that is the oldest one. The engine is alot noisier than the others. Has 1844 hours on it..

Neil B The injection pump (I think that what your referring to) says Yanmar HR30 6C14 D 564.
Dale G. Basgall I see the pump, very little to go haywire on those. The only weird thing I have encountered on those is an injector hanging every once in a while then pushing compression pressure into the fuel pump causing it to lose power and then come out of it when the engine load is taken from the machine. Otherwise a loss of power does indicate a possible low low of inlet fuel to the fuel transfer pump and then the tractor would just like slow down and lose power without missing like a wind up toy with a spring running down.

I will go back and re read the symptoms on your original post. On those systems there isa small filter inside the fuel tank and possibly it could be restricted for one reason or another. Try pullin the fuel tank line that goes into the primary fuel filter and use a low pressure air line to blow a burst of air back into the tank, I have done that before and it works if the fuel tank filter is your problem. After that is done hook up the lines and try it out again, try not to do more than one fix at a time, if that doesn't work then pump the transfer pump handle and see if the system pressurizes.

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