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Allis Chalmers Discussion Forum
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Stalled it...now it won't start.... AC 7000

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Paul Horst

11-23-2007 17:51:29




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I have a 1978 A. C. 7000. I was chisel plowing along a tree line when I snagged a large root. It stalled so quickly that I didn't even have time to push the clutch in. I went to start it and it acts like weak batteries. They checked out okay. So...thought it must be the starter, got it rebuilt, still won't start. At first it turned over normally, then it quickly slowed to the point where the starter wouldn't turn the engine over at all. Waited 10 minutes, and the starter turned it over again, but slowed to the point as just described. I charged the batteries again just to make sure I'm getting maximum amps to the starter. Iv'e tried this exercise over a couple days, to no avail.
I'm thinking that it might be a problem in the hydraulics. I have a John Deere backhoe that has a solinoid, to disconnect the hydraulic pump while the starter is engaged. My 7000 is acting just like the hoe does if the solenoid isn't working.
Anybody out there ever had this happen? Got any sugestions before I disengage the hydraulics to see what happens next? Paul

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Tom Presdorf

11-25-2007 03:49:04




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 Re: Stalled it...now it won't start.... AC 7000 in reply to Paul Horst, 11-23-2007 17:51:29  
The way to be sure is have a second person hold a volt ohm meter lead, set on voltage, on the main starter post while cranking. You can check anouther tractor to see what the normal delivered voltage is. 12 volt batteries are normally ~ 12,5 volts fully charged. The voltage drops under load. Dad had C - XT tractors over the years.



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Kentb of SWMO

11-24-2007 06:19:42




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 Re: Stalled it...now it won't start.... AC 7000 in reply to Paul Horst, 11-23-2007 17:51:29  
Try crankingthe engine with the fuel shut-off. I think you have a hydrulicing problem in the engine.

Kent



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856puller

11-24-2007 06:18:36




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 Re: Stalled it...now it won't start.... AC 7000 in reply to Paul Horst, 11-23-2007 17:51:29  
there could be a few things but as stated the batt cables are the place to start. the deere has a different type pump so the solinoid thing wont work



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MIKE FRENCH

11-23-2007 18:31:56




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 Re: Stalled it...now it won't start.... AC 7000 in reply to Paul Horst, 11-23-2007 17:51:29  
Had an oliver 1650d do the same thing once, rebuilt the starter, new batteries, etc. When it jerked the tractor the battery cables came apart inside the covering, new cables and good to go. Try jumping the tractor directly to the starter, that should tell you then, good luck.



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