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John Deere Skidsteer Forum
1992 JOHN DEERE SKID STEER 675B
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<blockquote data-quote="jchilcot" data-source="post: 105316" data-attributes="member: 12769"><p>This is a very old thread but I have a related problem with the same machine. I think there may be a problem with the pressure relief valve on my front drive pump. The pump case is getting pressurized and forcing the fluid out the little cover on the side of the pump. i removed the pump and sent it to a shop to be checked/rebuilt. They didnt find anything wrong with it. So I want to know the theory on how this is supposed to work. What is going on when the pump is running but the drive is not being used? Is the excess pressure fed back into the charge system via a relief valve? if this valve did not open would this pressurize the pump case? The lift hyraulics work fine and there is no issue with the rear drive pump.</p></blockquote><p></p>
[QUOTE="jchilcot, post: 105316, member: 12769"] This is a very old thread but I have a related problem with the same machine. I think there may be a problem with the pressure relief valve on my front drive pump. The pump case is getting pressurized and forcing the fluid out the little cover on the side of the pump. i removed the pump and sent it to a shop to be checked/rebuilt. They didnt find anything wrong with it. So I want to know the theory on how this is supposed to work. What is going on when the pump is running but the drive is not being used? Is the excess pressure fed back into the charge system via a relief valve? if this valve did not open would this pressurize the pump case? The lift hyraulics work fine and there is no issue with the rear drive pump. [/QUOTE]
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1992 JOHN DEERE SKID STEER 675B
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