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Allis Chalmers Discussion Forum

Oil pressure and filters

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Larry W

11-19-2003 18:44:35

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I've had my d-17 for about two years and have changed the oil twice. After the first change my pressure went from the "a" of "normal" to the "n". I assumed the previous owner used a heavier oil. the most recent time I lost all oil pressure. I replaced the gauge and still no pressure. I have the new style wix filter and after reading the comments from folks yesterday I think filters could be the culprit. I don't remember what filter was on the machine when I bought it but when I put the Agco filter on at the first change I had a significant, immediate loss in pressure and now the wix and I immediately have no pressure (except for an increase in blood pressure as a result). What is the best filter to use on a 1958 series I D-17 gas? Brand and part #? I appreciate any help. My new gauge has numbers as well, what is an acceptable oil pressure for this tractor?

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11-19-2003 19:20:19

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 Re: Oil pressure and filters in reply to Larry W, 11-19-2003 18:44:35  
Larry, i may have it wrong, but i believe the first year D17 had a bypass filter system line the WD45 and the B you read below. You need to use a high restriction filter that looks like it has a sock stuffed in int. A normal automotive filter with paper pleats will not restrict properly. There is alos a pressure adjusting relief vavle next to the dip stick area?? You add shims under the spring. Later on the new "full flow" filter was used on the D17. It is moe of an automotive filter. You might have the "new model" on the "old tractor". You should have about 12 psi when running. Look at the bottom of the filter to see what is inside. If it is hollow, it is wrong. If it is stuffed with cotton and has a perforated plate all the way across, it is correct. I hope everything i have said is true. I believe the first D17 was like the 45.

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