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Farmall & IHC Tractors Discussion Forum
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Injection pump question

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Chadd

12-10-2004 09:28:02




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Our 966 has the original American Bosch injection pump on it. About 2 years ago, a cylindrical piece with a screw head on the back came loose and then fell off of the back of the injection pump. When we got the tractor, it was cranked to 110 horse. Ever since that piece fell off, the total horsepower seems similar, but the powerband has become very peaky. We never used to go above 1800 rpm when doing field work because it had so much low end torque. Now it seems we have to keep it above 1800 alot because the low end grunt seems lessened. The high end seems to be uneffected though. We have left it alone for the last 2 years because we figured it still ran. After driving the 806 though, it makes me consider trying to fix it. After the piece fell off, the dealer who put the new clutch in screwed it back in and claimed that they reset it. Later, a different mechanic came and said that the pump is junk after that falls out and that he couldn't believe it still ran at all. If it requires replacing the pump, I think I will just let it keep going. That said, anyway to just reset(not rebuild!!) that thing myself? Any ideas or opinions would be appreciated.

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trulyred

12-10-2004 13:27:12




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 Re: Injection pump question in reply to Chadd, 12-10-2004 09:28:02  
Chadd, the part that came out is the idle adjusting screw with shut-off detent. With this out of adjustment it may affect the fulcrum inside the pump which affects the engine torque. With the engine running at about 600 rpm. and the locknut loosened turn the screw head of the part in until the engine speeds up and then set it at the proper rpm. about 700. The shut-off detent should be OK unless the little pin that sticks out of the center has fallen into the pump. Try this adjustment and see what happens.

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