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Allis Chalmers Discussion Forum
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190oil pressure

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lonzo

01-24-2006 19:50:26




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I installed a short block in 190 diesel and mounted a oil pressure gage in dash and now i see the pressure is 10 to 30 lbs, i have the adjustmen screw down tight. The oil pump didn't show any wear at all, I ask a gray haired allis mechanic and he saw this one time, the oil injectors coming off the main bearings shoot oil at the bottom of pistons,the other way the oil is pushed threw the rod bearing hole up threw a drilled passage and threw the piston pin bushing. Mr Allis said you can't have both systems at once and that could be happing with the short block with pressure problems,He said this only happen one time and was a odd ball, Does anybody have ideas?

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lonzo

01-26-2006 16:19:53




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 Re: 190oil pressure in reply to lonzo, 01-24-2006 19:50:26  
Nobody seems to have any idea about the 10PSI at a idle, I removed the oil pan and shot 25 psi air pressure in the fitting that feeds the turbo, The poor thing is not right, i get no and i mean no resistance when shooting air threw the oil passages,I went and shot 150 PSI air and didn't even make a nickles worth diffrence, There is a lot of air coming out of the holes that shoot oil to the bottom of the pistons, I didn't get any oil coming out of the mains like i have on some other engins that i have had problems with, I am suprised that the rod bearings aren't burnt yet they could be, I am going to take one down and look, This is not right and i need all the help i can use, I am going to hook up an electric pump and pump oil threw the syestem while the oil pan is off and see if i can see where the leakage is . Any body got ideas?

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Strange Brew

01-28-2006 21:03:44




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 Re: 190oil pressure in reply to lonzo, 01-26-2006 16:19:53  
Lonzo, you're worrying to much, we have had a gauge on one of our series 3's forever, it ALWAYS idles around 10 pounds, and that motor has 6000 hrs on it, no problems!!



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Strange Brew

01-26-2006 13:39:42




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 Re: 190oil pressure in reply to lonzo, 01-24-2006 19:50:26  
Well, gauge could be off, a lil, might need new spring on relief, but oil psi you are at is not unreasonable at all, if it runs 30 thats not bad, as far as the oiling you're talking about, all the 301 rods ran passages for oiling the wrist pin, and later turbo motors ran the piston cooling ports as well, he is wrong, factory came with both on turbo engines, was never any other way.



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Dan Weinert

01-25-2006 08:54:15




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 Re: 190oil pressure in reply to lonzo, 01-24-2006 19:50:26  
I agree, both of my 190xt's only carry 35 to 40 psi at best.



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Gene(WI)

01-25-2006 07:21:53




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 Re: 190oil pressure in reply to lonzo, 01-24-2006 19:50:26  
Sounds about right to me, think the book says 35 lbs at 2200 rpm It will be lower at idle, of course don't count on the pressure gauge being 100% accurate, especially if the scale is 0 to 100



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