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Draining gas

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Johan

04-09-2003 09:59:42




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The red tractors had petcocks for draining fuel which had got into the oil in various ways. Could the gas that has leaked into the oil in a JD tractor over the winter be skimmed off by letting it out through the oil level check plug? Does gas float on top of engine oil if undisturbed? Thanks for any comment.




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Brad Wies

04-09-2003 15:01:14




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 Re: Draining gas in reply to Johan, 04-09-2003 09:59:42  
Johan, I understand what you mean. On my old Case "DC-4" you let the oil drain out of the lower plug, the re install the plug, remove the upper one and fill to the correct level every 10 hours of use on low grade fuel. Since the low grade fuel didn't burn as well, the oil would get slightly contaminated and you drained about a quart out and re-filled it to the right level to keep the oil clean.

-Brad Wies

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Johan

04-09-2003 12:26:35




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 Re: Draining gas in reply to Johan, 04-09-2003 09:59:42  
Guess I was not quite right about the pet cocks.
The Red "A" manual reads: "When operating on distillate or kerosene: before starting your engine for the day´s work, open the lower test cock in the crank case pan and allow the oil to drain to this level. Close the lower test cock and open the upper cock in the crank case pan. Add new oil until it appears at this level.....".
I thought that maybe fuel and oil would separate during night and you could drain it off... Thanks for the correction.

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Dave K

04-09-2003 10:48:59




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 Re: Draining gas in reply to Johan, 04-09-2003 09:59:42  
Well, personally, I would NEVER take a chance like that! Fuel is a solvent for oils, or, at minimum, dilutes oil. If I had any sign of fuel in my oil I would change the oil and definatly correct the condition that caused it. They do not belong together! JD 2 cyl will sometimes leak fuel into the cylinders due to a stuck float in the carb. I always shut my fuel off and I open the compression cocks on my model A in case any fuel gets in there. I never saw a red tractor that had drains specifically for the purpose you state. I would think that any fuel in the oil would negate a warrenty right from the start!

Dave

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Dr.Evil

04-09-2003 12:03:40




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 Re: Re: Draining gas in reply to Dave K, 04-09-2003 10:48:59  
Operator's manual for red tractors burning kerosene, distilate, or "Tractor Fuel" had in the operation section that the oil was to be drained to the lower level and fresh new oil added to the upper level every 10 hours of operation to prevent dilution of the oil. As You say, it's doubtful any accumulated raw fuel could ever be drained. The fuel would mix with the oil.



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DPOST

04-09-2003 10:41:04




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 Re: Draining gas in reply to Johan, 04-09-2003 09:59:42  
Johan;

The two petcocks on the " red " tractors ( also on some ornge tractors ) were intended to monitor the level of oil in the engine. Sorta like the full and add marks on a dipstick of a car.

When adding oil the lower one is closed and the upper one is open. Oil is added till oil starts dripping out the open top petcock. When checking oil, the lower petcock is opened briefly and if oil comes out the engine has enough oil. If oil does not come out the lower plug it is time to add.

This was a better system than the old JD's had where it was necessary to take the plug out and shove a piece of bailing wire or a plier handle into the hole to see how far the oil was below the opening.

If you think you have gasoline in your oil, it is necessary to change oil. You can totally wreck an engine by running it when the oil had gasoline mixed into it.

D.D.Post

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