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<blockquote data-quote="Tazza" data-source="post: 2668" data-attributes="member: 82"><p>It sounds like you have the wrong hydraulic fluid in there, the previous owner may have used the wrong oil with the leak. It could also be a filter blockage.</p><p>Can you easily access the hydraulic/hydrostatic pump? if so, run the machine for a few minutes then see if they are hot, if they are you are getting cavetation which is basically foamy oil. When it gets pressurized the air bubbles implode causing damage (slowly), lots of heat and jittery hydraulic action.</p><p>Youur best bet would be a filter change, and an oil change. Call the local dealer and ask where the filters are located and get a set off them. There may be more than 1 filter, not just the one that you fixed the leak on so ask the service people.</p><p>As you mentioned that increasing the RPM stops all functions, i would bet its a filter on the suction side to the pump. As when you increase RPM it moves more oil, but if it can't get it, it will just stop working. Some filters are made of bronze, hidden in port blocks, or inline with a hose at either end.</p><p>Good luck!</p></blockquote><p></p>
[QUOTE="Tazza, post: 2668, member: 82"] It sounds like you have the wrong hydraulic fluid in there, the previous owner may have used the wrong oil with the leak. It could also be a filter blockage. Can you easily access the hydraulic/hydrostatic pump? if so, run the machine for a few minutes then see if they are hot, if they are you are getting cavetation which is basically foamy oil. When it gets pressurized the air bubbles implode causing damage (slowly), lots of heat and jittery hydraulic action. Youur best bet would be a filter change, and an oil change. Call the local dealer and ask where the filters are located and get a set off them. There may be more than 1 filter, not just the one that you fixed the leak on so ask the service people. As you mentioned that increasing the RPM stops all functions, i would bet its a filter on the suction side to the pump. As when you increase RPM it moves more oil, but if it can't get it, it will just stop working. Some filters are made of bronze, hidden in port blocks, or inline with a hose at either end. Good luck! [/QUOTE]
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