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Ford 9N, 2N & 8N Discussion Forum

3-pt goes up won't come down.

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04-30-2004 16:32:30

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This 8N will work fine but on three or four occasions the lift just takes a mind to run full up. I might be sitting still but this last time I was just mowing the fence line, looked back, and the lift arms were full up.. I fiddle with the controls and put the clutch in and out and after a minute or so it drops back down. I don't know what it is that makes it come down. I thought switching the position control back and forth a few times brought it down but this last time that didn't seem to work out. Maybe it was holding in the clutch and switching the position control...dunno. But it does come down and off I go everything just fine for a couple-three, four more hours of operation.
I'm going to split it this weekend to remove an aux tranny anyway. Is this a sticky/dirty exhaust valve or control valve or what?

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David Masury

05-01-2004 04:07:00

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 Re: 3-pt goes up won't come down. in reply to Rob, 04-30-2004 16:32:30  
I had this happen when I first got my tractor.. I ended up taking the pump out and thoroughly cleaning the entire rear end area of primordal ooze and odds bits of metal.... I cleaned the pump with diesel fuel and put it back... new oil and the arms worked perfectly, 6 times... they were stuck in the up position... took the pump out again to find a small piece of something had jambed the control valve in a nuetral position between up and down...

Do a very thorough job of cleaning the rear end area and around the pump as well as the pump and with new oil you should be fine.

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05-01-2004 04:20:09

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 Re: Re: 3-pt goes up won't come down. in reply to David Masury, 05-01-2004 04:07:00  
After reading the book it looks like it has to be that hanging control valve, just like you say. There must be a chunk of something in there.

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Bruce (VA)

04-30-2004 17:33:34

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 Re: 3-pt goes up won't come down. in reply to Rob, 04-30-2004 16:32:30  
Yep, I agree; most likely a stuck exhaust valve. Next time it does it, remove the right inspection cover, reach in & push the control rod to the rear. If it's a sticking exhaust valve, the arms will drop. If you don't want to drop the pump & clean it out, try draining the fluid and flushing the pump a few times by pouring kerosine over it. Also, you can clean out a lot of sludge by hand by just reaching in through the inspection plate openings.

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