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Allis Chalmers Discussion Board
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Topic: C low vacuum
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MTC

10-09-2009 17:38:45
207.190.98.227
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Hi guys-just bought a little Allis C has not run for awhile.Got good spark.Took a compression test ran,120,100,120,and 120.So that all looked good.Held hand over carb to help choke it and hardy any vacuum.The plugs are dry also so not getting gas to cylinders.Took the manifold off looking for a crack and it looked good.Any other advice?I sure like this site and all your advice.Thanks Mike

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MTC

10-10-2009 12:25:50
207.190.98.243
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Re: C low vacuum in reply to MTC, 10-09-2009 17:38:45  
Found my problem why no vacuum.The drain hole on the bottom of carb bowl was open.Boy i feel dumb after i took manifold off.Live and learn I guess.Thanks

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DickL

10-10-2009 15:30:39
76.76.33.112
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Re: C low vacuum in reply to MTC, 10-10-2009 12:25:50  
That I would never have guessed. The bowl drain being open that is. Feeling dumb about stuff like that is normal for all of us.

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DickL

10-09-2009 19:05:25
76.76.33.112
119948



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Re: C low vacuum in reply to MTC, 10-09-2009 17:38:45  
I had a manifold that I cut up a while back and it had rusted tru between the exhaust and intake inside where it could not be seen without cutting it into pieces. You can check for that with air.

The area in the picture was in the center where the intake pipe goes thru the exhaust.


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