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Farmall & IHC Tractors Discussion Forum
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Can oil do that?

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KevinH

03-09-2005 15:30:38




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Ok, I"m perplexed(not hard to do). On my regular(without oil filter), the oil line t"s out of the front of the block. 1 line goes to the governor, the other to the oil guage. If I remember my physics, fluids follow the path of least resistance. So, how will there ever be pressure on the guage? I know I must be missing something, but what. Someone please enlighten me before my brain explodes. Thanks.

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dsldr

03-09-2005 17:40:42




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 Re: Can oil do that? in reply to KevinH, 03-09-2005 15:30:38  
Keep 2 more issues in mind. 1) pressure is equal in all directions. 2) you cannot compress a liquid.



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KevinH

03-09-2005 17:28:22




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 Re: Can oil do that? in reply to KevinH, 03-09-2005 15:30:38  
Thanks, guys. I feel better. I left the oil filler cover block off when I started it and oil was flowing into the governor, so I feel safe in continuing to run it. If I only had the tractor ready to accept the engine....



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Nebraska Cowman

03-09-2005 17:41:09




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 Re: Can oil do that? in reply to KevinH, 03-09-2005 17:28:22  
Oh, it'll come kev. just takes time.



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Nebraska Cowman

03-09-2005 17:22:03




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 Re: Can oil do that? in reply to KevinH, 03-09-2005 15:30:38  
yes, normaly that is how it works but on those old farmalls the cranchshaft bearings are not pressure lubricated. the oir just runs out of a pipe where it is picked up by dippers on the rod caps. The line to the governor is just an open line too. So as long as you have any pressure reading on the gauge it tells you that there is flow and that is all that matters. i helped a kid put an F12 together and we couldn't get ANY pressure. but when we pulled the gauge off oil ran out the hole so I told him to go ahead and run it. At least we knew the pump was pushing oil.

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Sean in Calgary

03-09-2005 15:53:46




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 Re: Can oil do that? in reply to KevinH, 03-09-2005 15:30:38  
You are absolutely right, the oil will follow the path of least resistance. Your oil gauge is not telling you the output pressure of your pump but instead the more important piece of information, the amount of backpressure in the total system. Your pump may be able to put out 45 psi (I am just making up a number) but if you have a leaky bearing then all of the oil will flow out there and give you almost no pressure overall, which will starve critical parts of the lubrication they need.

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