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3 Pt goes up but not down

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Mike (NM) '49 8

05-28-2000 14:36:05




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Help, I just got my '49 8N back in service after a major on the engine and yesterday, while leveling under my trees my 3pt went up but would not go down. After the engine is off it does go down very slowly but as soon as the engine starts, it is back up again. I can tell when I lower the control handle that the pump changes pitch so I know the control handle is still connected to the interior controls. Any suggestions???

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Fred OH

05-31-2000 13:13:47




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 Re: 3 Pt goes up but not down in reply to Mike (NM) '49 8N, 05-28-2000 14:36:05  
Tell you what I'd do if it happened to me. Get a magnet and run it around the bottom of the sump. If you find a small pin about a quarter inch diameter, put it back in the control linkage that goes down around the drive and pto shafts to work the control valve. Also check the control valve to see if it is snapped into the bottom of the control linkage. Takes a small cotter pin to hold the little pin in btw or a miniature R clip. L8R----Fred

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ZANE

05-29-2000 07:36:21




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 Re: 3 Pt goes up but not down in reply to Mike (NM) '49 8N, 05-28-2000 14:36:05  
Try taking off the right hand inspection plate that holds the dip stick. Look up to where the ram rod connects to the rocker arm on the rocker arm shaft and see if the rod has fallen out of it's socket because of a missing rerainer pin. This can and does happen.
If everything seems to be intack reach in and push the control rod toward the rear of the tractor to see if it is stuck. This also is possible and happens all the time. Especially if there is a lot of foreign material floating around with the oil.

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zigzag

05-28-2000 16:58:33




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 Re: 3 Pt goes up but not down in reply to Mike (NM) '49 8N, 05-28-2000 14:36:05  
I just experienced this problem after rebuilding my lift cylinder on a 9N. I had to make adjustment to the main control spring and that fixed it.



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Nolan

05-28-2000 16:31:24




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 Re: 3 Pt goes up but not down in reply to Mike (NM) '49 8N, 05-28-2000 14:36:05  
Possibility of a blocked exhaust port at the control valve comes to mind.



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