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John Deere Tractors Discussion Forum
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Re: Early '35 John deere A oil pressure

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12-13-2013 15:17:39

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Well here is the story of no oil pressure.I was sure the previous owner said he had just changed the oil and the oil looked good at the check oil valve when I checked each time. I've had the tractor about a year. I drain the oil( mostly sludge) looks like tar and pull the filter cap off to find no filter. The filter area was also full of sludge( go ahead and call me dumb asxxx at any point. I now have the crankcase filled with Kerosene for the night and will drain in the a m. What do you'll suggest to do next.thanks D A

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12-13-2013 18:10:16

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 Re: Early '35 John deere A oil pressure in reply to Golfcartman, 12-13-2013 15:17:39  

As Vern said, everything stated so far is good advice. Sounds like it might be mostly the sludge that is the culprit, and with it possibly more neglected things. You might want to pull the crankcase cover and check out all the internals, given what you are finding.
One more thing I would add is that you may have an oil pressure test port just below the "red head" oil stick. Basically "any" oil pressure is "good" oil pressure. 5 PSI and up???
Here is a pic I just took of a late 35 governor for reference. The 1/4" pipe plug is where you can install a gauge, when you retest.

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Vern H

12-14-2013 11:04:29

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 Re: Early '35 John deere A oil pressure in reply to A GURU, 12-13-2013 18:10:16  
Hi A Guru,
Thanks for posting the pic. It jogged my memory enough to go look at my old rag of a 35A. When I bought it someone had brazed a nut below the plug, brazed the pop-up rod at the top, drilled through the casting at the nut, and installed a gauge. It was ugly! I cleaned it up back to original. Luckily all the parts were still there. Behind the existing plug is a hole that drains any oil that leaks past the pop-up shoulder/seat back into into the governor housing. There is never any pump pressure to the plug so it isn t a spot for a gauge. When the pop-up comes up I think to myself, good, I have some oil pressure! Please keep up the very informative posts. Happy holidays all. VH

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12-14-2013 06:00:43

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 Re: Early '35 John deere A oil pressure in reply to A GURU, 12-13-2013 18:10:16  
I tried putting a gauge on mine here too but it didn't register. I just depend on the red head now.

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12-14-2013 11:30:26

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 Re: Early '35 John deere A oil pressure in reply to elkcagg, 12-14-2013 06:00:43  
My mistake. I just assumed it would show the pressure. I knew it led to the gov bearing but thought it would still register something. I didn't have an open one to look at. As you said, the pop up is a plenty good enough indicator, if it functions. Practically any oil pressure at all is enough oil pressure.

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Vern H

12-14-2013 14:36:11

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 Re: Early '35 John deere A oil pressure in reply to A GURU, 12-14-2013 11:30:26  
A Guru,
An after thought. That plug opening would certainly make a swell spot for a gauge if the pop-up innards were removed, and the top and the relief holes were plugged. I m with you on using the pop-up. I don t think it is as important to know how much pressure you have as just knowing you have some. Best regards, VH

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Vern H

12-13-2013 16:15:51

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 Re: Early '35 John deere A oil pressure in reply to Golfcartman, 12-13-2013 15:17:39  
G-man, All of this is good advice. If the pump housing is worn some you might leave the gasket off the cover and just use sealer. Do check the top of the filter canister for distortion at the top from being over tightened. I straightened mine in place with shaped block of wood inside and a hammer. If all looks good, tow it around the yard a few laps. Good luck, VH

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