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?
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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.
God must have loved stupid people because he made so many of them.
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.
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.