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Engine RPM and Hydralic Lift Relationship

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*8N-B *8N38007

11-08-2000 19:04:29




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On my 8N, I notice that the engine RPM and the HADRALIC LIFT speed seems to be related. That is when I increase the engine RPMs the HYDRALIC LIFT increases its speed, moving up and down.

Is this considered normal, or is this an "early warning sign" that the HYDRALIC LIFT is in need of repair.

When the engine is running very slow the HYDRALIC LIFT moves very slow, when the enginge is running very fast the HYDRALIC LIFT also moves very fast.

Should a "8N owner" increase the engine RPM when using the HYDRALIC LIFT?

How does an "original 8N operators manual" address this problem?

THANKS IN ADVANCE FOR ALL RESPONSES

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Fred OH

11-09-2000 05:25:43




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 Re: Engine RPM and Hydralic Lift Relationship in reply to *8N-B *8N380077* , 11-08-2000 19:04:29  
If you have an 8N that goes up faster and down faster when the rpm is increased, you should guard that tractor, it's the only one in existence. If you had a book on it and studied it a little, you would find out that a valve is opened to let it down and the only thing that controls the down speed is the weight on the 3pt hitch or the temperature of the oil. Winter time will be slower because the oil is thicker. If you spend some time in the archives looking at hydraulic related problems, you can educate yourself as to what kind of oil to use in it and how long it should stay up after shutting it off and etc. After reading through these, then you can make a decision as to whether or not you have a problem with yours. This also goes for any other problem you have with your tractor, look in the archives first. BTW if you do use the archives, spell it as "hydraulic" or it might not come up. Sometimes these computers can be worse than working on an 8N Ford. L8R----Fred

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norm-wy

11-08-2000 21:00:38




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 Re: Engine RPM and Hydralic Lift Relationship in reply to *8N-B *8N380077* , 11-08-2000 19:04:29  
8N380077
Since the engine is powering the hydaulic pump which powers the lift, it would follow that the behavior you describe is normal. Although I haven't really considered 3pt lift speed as throttle controlled I guess you could change engine speed to match the work you are doing. Having never seen the original 8N Owners Manual, I can't help you but I'm sure someone will post an answer. FWIW

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Eddie S.

11-09-2000 06:49:17




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 Re: Re: Engine RPM and Hydralic Lift Relationship in reply to norm-wy, 11-08-2000 21:00:38  
Just like everything else in an N, the hydraulic pump runs of the torque and power of the engine. Therefore, when the engine isn't running very fast, the hydraulic pump isn't pumping very fast. Likewise, when the engine is at full speed, the hydraulic pump will be at maximum lift speed.

After reading your post, it seems to me there is nothing wrong with your pump. Now then, if it leaks down after you shut the engine off, then there is something wrong. Consult previous posts.

Cheers.

Eddie S.

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