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Tractor Talk Discussion Forum

long tractor hydraulics

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wayne plotts

04-02-2005 08:21:21




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Can anybody offer some suggestions?
Here is the problem we have. We have a Long 445 that pumped all of the hydraulic fluid into the crankcase. We thought that the only way that could happen is a shaft seal failure on the power lift hydraulic pump. We overhauled the pump which included replacing the shaft seal. After using the lift for just a short time the same thing happened again- it pumped all the hydraulic fluid into the engine.
The power lift operated erraticly, that is it would lift a couple of times and then quit. We would bleed the system by cracking a fitting and it would work again for awhile.
It also has a separate pump for the power steering but there is no indication that either of these pumps has leaked around the shaft seal.
Any information would be appreciated.
Thanks,
Wayne Plotts

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Jim in NC

04-03-2005 07:19:57




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 Re: long tractor hydraulics in reply to wayne plotts, 04-02-2005 08:21:21  
I don"t how much I can help. I have a friend who just replaced the seals in his power steering pump because he was getting motor oil in his power steering oil reservoir on a 360. The local long dealer said this would fix it. However we discovered that there were 2 different pumps that were used even though they looked the same on the outside. The first set of two seals was wrong. The inside diameter fit the shafts, but the outside diameter was too small to fit the housing. The pump he had required only one seal. His steering system is the power-assisted steering with the hydraulic cylinder on the left side as is mine. I have a 445 and a 360. My dealer had to contact Long and we got the correct parts. The tractor has not been run enough to see if it is fixed. From what I know (which may not be very much), the only place that engine oil can mix with hydraulic or power steering oil is at these pumps. I have the seals here that we did not use. My parts guy told me that depending on which series of pumps was on the tractor, both pumps used the same seals. BY now, you are probably totally confused. My parts guy is Robbie at 336-885-4582. He may be able to help you. He is a great guy and used to work on Longs at another dealer. Sorry for the length of this post, but maybe this will help. You can find dealer locations at farmtrac.com

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