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WD-9 Injector pump trouble


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10-14-2001 11:40:46

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I acquired a WD-9 for free a couple years ago and put diesel in it and couldn't get it to run pulling it around the yard. It was stuck when I got it but came loose easily. I have since done the same several times in the last couple of years. If I pull it around with the compression lever set for gas and then switch to diesel it will fire a couple of times. It will also fire on ether when in the diesel position. It will shoot fuel out of the injector lines, but not out of the injectors themselves. It has good compression on 3 cylinders, number 4 is weak. I have had the injectors tested and they work. I have bled the system of air, I have checked the pump timing, everything I can check has been checked and set according to the shop manual. Unfortunately the shop manual does not provide much info for working on the pump itself.

Does anyone know of anything that could be fixed in the pump to make it work? I know the primary pump works even when cranking it by hand it will run fuel out of the final filter. I do not want to spend $600 to $1000 for pump repairs on a free tractor. OR if anyone has a good pump they would like to sell for a reasonable price (less than $250), please email me.

Thanks for your help.


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10-14-2001 16:56:21

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 Re: WD-9 Injector pump trouble - rebuilding in reply to Steven, 10-14-2001 11:40:46  
Steven, are you saying it does not start or work on gas? If it doesn't work on gas at all might I suggest you go that route first? Fix it so it starts and runs on gas because having the engine warm when you switch to diesel can make a big difference. I have to say though, knowing what I know now that my WD-9 runs, $1000 is not too much to spend if it's the pump that is broken.

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10-14-2001 18:56:09

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 Re: Re: WD-9 Injector pump trouble - rebuilding in reply to Rich, 10-14-2001 16:56:21  
I pull the tractor around the yard for at least 15 minutes when I try to get it running so the engine is plenty warm to run on diesel.


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10-16-2001 05:15:00

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 Re: Re: Re: WD-9 Injector pump trouble - rebuilding in reply to Steven, 10-14-2001 18:56:09  
Best of luck to you. I was only basing my comments on my wife's grandfather who owned the WD-9 I restored. He said they had never been able to start it on diesel even after pulling it a mile or more. This was when the injector pump was known to work. Still runs good but we start on gas.

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10-14-2001 19:01:54

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 Re: Re: Re: WD-9 Injector pump trouble - rebuilding in reply to Steven, 10-14-2001 18:56:09  
Call Steel Wheel Ranch 785-548-7437. I think he's got some used pumps around for the WD-9 and 650D tractors. Might be worth a shot.

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