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Allis Chalmers Discussion Forum
:

Oil Pressure for D17 Series 1 30 or 80 lbs?

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Bevan

10-28-2013 08:11:11




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I have an oil pressure gauge that maxes out every time I start up the tractor. My assumption is the previous owner either installed the wrong one or the gauge is wore out. I am looking at replacement gauges and I see there are 30 lbs and 80 lb replacements. How do I know which one is right for the 1958 I have.




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Brian G. NY

10-30-2013 20:33:17




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 Re: Oil Pressure for D17 Series 1 30 or 80 lbs? in reply to Bevan, 10-28-2013 08:11:11  
If the filter is the old style which fits down over a tube, the pressure will be about 5 to 15 PSI.
This is the old low pressure by-pass system used by A-C since the 30s and was still being used on the early D-17s.
The newer D-17s used a more modern filter equivalent to the Ford FL-1A and the pressure should run about 25 to 35 PSI. This is the high pressure full flow system which better accommodates the stresses placed on the 226 engine"s higher RPMs and compression in the D-17.

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Brian G. NY

10-30-2013 20:38:05




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 Re: Oil Pressure for D17 Series 1 30 or 80 lbs? in reply to Brian G. NY, 10-30-2013 20:33:17  
BTW, the changeover took place with the Series I tractors at Ser. #19978. So....a series I could have either a low pressure or high pressure system depending on the production date.



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Brian Jasper co. Ia

10-30-2013 20:01:00




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 Re: Oil Pressure for D17 Series 1 30 or 80 lbs? in reply to Bevan, 10-28-2013 08:11:11  
It depends on which engine you have. Originally, the series 1 had the low pressure bypass type oiling system. 10-15 psi was typical. The full flow system is higher. They"re easy to identify. The bypass filter has threads like a Mason jar with a tube sticking up the center of the filter. The full flow system uses a spin on filter Fram PH8A equivalent. Sounds like your tractor may have had a newer engine retrofitted or the relief valve may be stuck.

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Diydave

10-28-2013 18:55:03




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 Re: Oil Pressure for D17 Series 1 30 or 80 lbs? in reply to Bevan, 10-28-2013 08:11:11  
The R in the word normal, in an OEM AC gauge is about 20 lbs oil pressure, on a 30 lb gauge.



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JMS/.MN

10-28-2013 14:28:41




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 Re: Oil Pressure for D17 Series 1 30 or 80 lbs? in reply to Bevan, 10-28-2013 08:11:11  
30 is waaaaay more than enough.



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old

10-28-2013 08:40:14




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 Re: Oil Pressure for D17 Series 1 30 or 80 lbs? in reply to Bevan, 10-28-2013 08:11:11  
If I remember right the D-17 still had to low pressure oil system like many of the older A/C tractors so the 0-30 is the gauge you want.



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