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Lesser Known Classics Discussion Forum

yanmar hydralic pump screaming

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RICK GRANT

09-06-2004 18:02:11




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the hyd. pump on my dads yanmar really screams when he trys to raise an implement any suggestions




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Craig Anderson

09-08-2004 22:28:27




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 Re: yanmar hydralic pump screaming in reply to RICK GRANT, 09-06-2004 18:02:11  
Is this an implement that the hydraulics could lift before or is this a new, heavier, implement that is maybe beyond the capacity of the hydraulic system? Is it the pump that is screaming or a relief valve making the racket? Is there a suction filter or screen between the pump and reservoir that could be restricting the free flow of oil to the pump? Even a piece of foreign material in the line somewhere could cause this to happen. Is this the first time this has happened? Please post back. Craig

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ric

09-11-2004 18:29:53




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 Re: yanmar hydralic pump screaming in reply to Craig Anderson, 09-08-2004 22:28:27  
the tractor is lifting a 5 ft finish mower not all that heavy really



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Craig Anderson

09-11-2004 19:05:36




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 Re: yanmar hydraulic pump screaming in reply to ric, 09-11-2004 18:29:53  
How large a tractor is this, what model or horsepower? Without more details I would guess it"s the relief valve making the noise. The pump ONLY makes noise when trying to raise THIS implement? Another question: DOES it raise it? And if so, once raised does the hydraulic system hold it and the noise stop? Craig



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