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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Flushing a White 2-105 Hydraulic System...???

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Kerry Owen

09-19-2004 23:41:14




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I just bought a clean 1977 2-105 with less than 300 hrs on an engine overhaul at a price that was VERY reasonable...
The reason the price was cheap was that the previous owner had become frustrated after he replaced two rebuilt hydraulic pumps and finally installed a new pump from AGCO. He decided to sell the tractor before another pump failed.
Although the new pump is operating fine and is not overheating, the power steering recently began leaking at the front axle.
I am convinced the multiple pump replacement and now the leaking PS is the result of not cleaning all the metal debris out of the hydraulic system.
Before wasting the new hydraulic pump, and while replacing the power steering seals, I would like to completely clean and flush the hydraulic system but am at a loss as to the recommended proceedure to follow.
I have read the archives regarding pump failure and setting valve pressures but would appreciate recommendations as how to proceed to completely clean the hydraulic system and avoid further pump and seal failures.
Thanks.

Kerry

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J. Schwiebert

09-20-2004 05:04:53




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 Re: Flushing a White 2-105 Hydraulic System...??? in reply to Kerry Owen, 09-19-2004 23:41:14  
Kerry: You are deinately on the right track on wanting to flush the system. Make sure you clean the powere steering cylinder thoroughly when you have it apart. The scaring thing is that if the correct hydraulic filter is being used it is rated to filter out down to 10 micron. The human eye can not see particles smaller than 40 micron! So if you can see some particles they need to go!
I would wash the inside of the power steering cylinder with hot soapy water, run a white paper towel through it, make sure it came out clean and then oil it up good before reassembly. Just like washing an engine block, solvent will not clean as well as good soapy water. Another thing that is kind of frightening and I have seen more of those Vickers piston pumps on industrial power units than I have in White or Oliver tractors is they do not like contamination or caviatation and the oil people buy does not have to be filtered down to less than 70 micron so the clean oil out of a drum is not clean when you open the drum! We advise them to filter it through a filter cart before filling the reservoir. I have yet to see the first farmer with a filter cart. But use good filters-10 micron. (there are other micron rating filters than fit that canister) Make sure the breather (and if you have a cab on the tractor it will help keep the dusty air away) is clean. Are you only using one trailing cylinder? You may want to disassemble it, flush the hoses and then reassemble it as well. In 1977 I was gone already from the dealership and now I am trying to remember how hard it is to take the top off the hydraulic unit and look in there. This is election year and the above is like a political speach. It did not tell you everything you wanted to know and hear. John

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