Gravely Tractor with Low Oil Pressure?

Discussion in 'Shop Talk' started by n8tureboy, Jul 2, 2007.

  1. n8tureboy

    n8tureboy Well-Known Member

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    I bought a Gravely tractor model "L" this week, but I've got a problem. It seem's that after the machine warms up to good operating temperature the oil pressure drop's off to just above "low" pressure on the guage and the machine starts running sluggishly!

    Does anyone have any suggestions as to the cause of this problem, bad oil pump, or plugged oil intake?

    I didn't pay much for this machine, but now I'm wondering if It's going to take some major work?
     
  2. bill not in oh

    bill not in oh Well-Known Member

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    Those would be the two obvious reasons. If you want the world's best resource for Gravelys, these folks have ALL the answers ....

    http://groups.yahoo.com/group/gravelyclub/

    They've saved by butt numerous times...
     

  3. Old Vet

    Old Vet In Remembrance

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    Probily the thing is worn out. Put some oil aditave in the oil to thicken the oil and the presure should come up a little bit. It doesn't take much oil presure to keep them runing but it takes about 10 psi.
     
  4. n8tureboy

    n8tureboy Well-Known Member

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    Thank's for the help.....I'll try some additive or some thicker oil.
     
  5. bill not in oh

    bill not in oh Well-Known Member

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    I'd avoid modifying the oil without knowing the problem - it will just make finding the problem more difficult - unless of course you are willing to junk the engine or the whole machine. There are thousands of the L models in service. They are relatively simple to work on and parts are readily available. I'd start by getting some opinions from folks that have experience with these machines. I mentioned the Gravely Club Yahoo group - there's a regular poster (Chip Old) on there that has a link in his signature to manuals that can be downloaded for free (I have a couple). Find the problem then decide whether the solution is within your mechanical ability (it probably is) and budget, but making the oil thicker is a short term band aid at best.
     
  6. n8tureboy

    n8tureboy Well-Known Member

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    Thank's Bill....I'll take your advice.
     
  7. Ed K

    Ed K Well-Known Member

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    Gravely L models have an adjustable pressure relief valve on the oil supply that can be adjusted to increase the oil pressure, Consult one of the online resources or a manual on how to do it. At low idle the oil pressure is not high but when you increase the throttle the pressure should rise to normal levels.

    If it's running sluggishly when warm that may be an item unrelated to oil.

    Good Luck