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Deere 310e hoe- no oil pressure

Discussion in 'Tractor/Loader/Backhoes' started by Pipevine, Oct 11, 2018.

  1. Pipevine

    Pipevine Member

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    I've got a 99 310e how with about 2400 hours on it. Started it yesterday and the low oil pressure light came on. I teed a mechanical gauge in to the sender port and I'm getting no oil pressure. Everything sounds and runs normal though. I was planning on changing my oil yesterday anyway so I went ahead and changed it after the light came on but it didn't make any difference. Any suggestions would be greatly appreciated.
     
  2. Pipevine

    Pipevine Member

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    I forgot to mention there are no visible oil leaks anywhere.
     
  3. Tinkerer

    Tinkerer Senior Member

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  4. Pipevine

    Pipevine Member

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    So I guess the next step is to pull the pan and investigate?
     
  5. Tinkerer

    Tinkerer Senior Member

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    Yes.
    Because a mechanical gauge has proven you have no oil pressure. Hopefully no damage has been done to the bearings.
     
  6. joe--h

    joe--h Well-Known Member

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    No pressure relief valve on those engines?
     
  7. Tinkerer

    Tinkerer Senior Member

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    I wondered about that also. Something has to regulate the pressure. I looked at the oil filter assembly and there was nothing there that I could see.
    But after looking further today, I found out there is an engine oil by-pass valve with a regulating spring. This is the most likely culprit IMHO. I would still recommend removing the oil pan and checking that screen, and the tube for loose bolts. .
    Many years ago I had a Chevrolet Camaro and it had the regulating spring in the oil pump. The spring actually broke into two pieces. The red light was the only indication the pressure dropped to 2lbs. I put a mechanical gauge with a grease gun hose and screwed it into the sending unit port on the block.
    bypass.png
     
    Last edited: Oct 12, 2018
  8. Pipevine

    Pipevine Member

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    So how to i get the the spring on the prv to check it?
     
  9. Pipevine

    Pipevine Member

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    So how do I get to the prv spring to check it?
     
  10. Tinkerer

    Tinkerer Senior Member

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    Sorry I am not a "DEERE guy" Pipevine. So, I have no idea as to what all you have to remove to get at it.
    Hopefully Delmer or one of the other members that have Deere experience will read this and help.
    A service manual is your friend in these types of situations.
    If you still have the old oil filter you could cut it open and look for shiny things in the pleats. Hopefully it is spotless.
     
  11. joe--h

    joe--h Well-Known Member

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    My MF50 hoe has a Perkins 4-236. Same clever bullshit, relief valve is in the oil pump. Drop pan to clean the tiny piece of whatever was in it. Idiot engineer designed that should be shot.
    Joe H
     
  12. Pipevine

    Pipevine Member

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    Thank you. I was surprised and irritates when I realized that the full factory service manual is bought didn't include anything for the engine. So I guess I'll see if I can scare up a 4045 manual now.
    Thank you all for your help. I'll let you know what i find.
     
  13. Tinkerer

    Tinkerer Senior Member

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    Last edited: Oct 14, 2018
  14. Pipevine

    Pipevine Member

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    Thank you tinkerer. It's greatly appreciated.
     
  15. Tinkerer

    Tinkerer Senior Member

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    Thank you for the thank you, Pipevine.:)
    Please post back what you find out. It will help others with the same problem in the future.
     
  16. Pipevine

    Pipevine Member

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    Well , thus far I've found out that if it is the prv spring then it appears it's. Royal PITA to get to. I'm hoping mine has the plug in the timing cover to access it.
     
  17. Tinkerer

    Tinkerer Senior Member

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    I hope it has a plug to ! What a stupid design by John Deere.
    They must of anticipated problems with springseeing that the manual goes into detail about replacing it.
    Even if yours checks out OK it might be a good idea to replace anyway.
    That is the strangest location I have ever seen for an engine oil pressure regulator.
     
  18. joe--h

    joe--h Well-Known Member

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    That's worse than the Perkins drop the pan.

    Engineers trying for the "I'm the stupidest" prize.

    Joe H
     
    Tinkerer likes this.
  19. Vetech63

    Vetech63 Senior Member

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    Every engineer thinks that the stuff they design will NEVER need repaired. That's the only explanation that makes sense sometimes.