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Re: Re: Re: Re: Re: International 606 hydrolic pro
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Posted by Joe Evans on April 22, 2004 at 08:31:03 from (209.41.233.220):
In Reply to: Re: Re: Re: Re: International 606 hydrolic problem posted by Kris on April 22, 2004 at 04:55:26:
Well, this is a bit clearer. However... Sounds like the weight you lifted is substantial, but I interpret your response as "it lifted the load, but we had to rev the engine to do it." Is this the correct scenario? A hydraulic pump in good condition will move oil. Period. Therefore, if your pump is in good condition, then the load will raise even if the tractor is idling. Now, it won't go up very fast, but it will go up. You've answered the question regarding undue squealing noises which tell me that the other components in the hydraulic system are not shunting pressure away from the task at hand--raising the loader. If you have to rev the engine to raise the load and provided the pump is not starving for oil on the suction side, you are describing a pump that has seen better days. Sounds to me like internal pump wear. The pump clearances have opened up enough to where you have to rev the engine which increases the GPM output of the pump. At low RPM, there is not much pump output volume. This small volume will take the path of least resistance in a worn pump which will result in internal bypassing. When you rev the engine, GPM of the worn pump increases. The wear clearance in the worn pump is not enough to swallow all the increased GPM, therefore some of the output will go to your loader. This sounds exactly like the condition that I just corrected on our 460. In the interest of keeping this response short, visit the page I just wrote for our web site. I wrote this page for just such an occasion! This will tell you where the pump is. One thing that I don't think you can determine by looking at a pump that has been removed is what size it is.
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