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Ford 9N, 2N & 8N Discussion Forum
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Another Question. How Much At Low RPM

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Pooh Bear

09-12-2006 09:44:46




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How much gas does an 8N use at low RPM, near idle.
Say, 1/8 throttle, just above idle.

And how much HP does the PTO put out at this speed.

Will it hurt anything to sit and idle for long periods of time.

Pooh Bear




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gahorN

09-12-2006 18:32:52




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 Re: Another Question. How Much At Low RPM in reply to Pooh Bear, 09-12-2006 09:44:46  
Pooh Bear, I can't say it's true of these N engines but I suspect it is...that long periods of idling starve upper cylinders of lubriation due to the fact thatin most engines such lubrication is due to crankshaft "sling". Many aircraft engines carry a caution against prolonged idling below 800 rpm, and those engines typically operate at similar rpms as our tractors. (2,000-2500 rpms).



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Pooh Bear

09-13-2006 12:17:31




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 Re: Another Question. How Much At Low RPM in reply to gahorN, 09-12-2006 18:32:52  
Sorry I didn't respond to this before now.
It dropped off the front page and I forgot about it.

I am building a water pumping rig that runs off the PTO.
It's a small pump and doesn't need much HP.
The electric motor for the pump was 350 watts.
I'm using belts and pulleys to get the low speed PTO
up to the 2800 RPM pump speed.
I'm planning on the tractor running at just above idle,
somewhere around 175 to 200 PTO RPM.
And then it goes thru a system of belts and pulleys
to get a 1:14 gear up to run the pump.

I'll get pictures when I'm done.

Pooh Bear

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