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Ford 9N, 2N & 8N Discussion Forum
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9N Hydraulic Question

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Larry in Ark.

06-14-2020 19:42:15




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Lifts good with weight but won't come down right away. Pulled pump more than once. Cleaned real good, results the same. Pulled it again and put in all new parts. Same results, up good but won't go down. Pulled it again with arms up, took control valve out, arm stayed up. Took caps off valve chambers, arms still up. Took out relieve valve, arms dropped. Took lid off, everything looked good. Moved quadrant many times, no luck. I've kept this old girl going for 40+ years but this has me baffled - anybody have a pump zipper?? Any help would be appreciated. Thank you.

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Hobo,NC

06-15-2020 17:38:29




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 Re: 9N Hydraulic Question in reply to Larry in Ark., 06-14-2020 19:42:15  
You can confirm the issue is in the pump once you have it out befor and after the repair. In this post its an 8N pump yours is about the same uo only have one valve to deal with...



https://forums.yesterdaystractors.com/viewtopic.php?t=1341199&highlight=drive



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JMOR

06-15-2020 08:55:11




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 Re: 9N Hydraulic Question in reply to Larry in Ark., 06-14-2020 19:42:15  
Quoting Removed, click Modern View to seePut it back, as there are really no replacement options.



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Larry in Ark.

06-15-2020 08:48:20




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 Re: 9N Hydraulic Question in reply to Larry in Ark., 06-14-2020 19:42:15  
Should I drive the bushing out and put it back in or do I need to replace it? When I cleaned it, I used a deliming tool (for a coffee pot) and ran it clear through both sides.



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JMOR

06-15-2020 06:43:53




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 Re: 9N Hydraulic Question in reply to Larry in Ark., 06-14-2020 19:42:15  
Quoting Removed, click Modern View to seeAs Hobo suggests........., my response was intended to say, pull the control valve bushing out and clean behind it.



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Hobo,NC

06-15-2020 06:18:46




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 Re: 9N Hydraulic Question in reply to Larry in Ark., 06-14-2020 19:42:15  
Did you drive the bushing out the control valve rides in.



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TheOldHokie

06-15-2020 02:49:28




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 Re: 9N Hydraulic Question in reply to Larry in Ark., 06-14-2020 19:42:15  
Quoting Removed, click Modern View to see

Not good enough because the exhaust valve is not working. Its either sticking in the bore or something is obstructing the port opening. The lift came down when you removed the relief valve and opened up an alternate path for the oil to exhaust.

TOH



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Larry in Ark.

06-14-2020 21:53:37




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 Re: 9N Hydraulic Question in reply to Larry in Ark., 06-14-2020 19:42:15  
Quoting Removed, click Modern View to see

Thanks for your reply. I'm sure I cleaned it real good.



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JMOR

06-14-2020 20:52:13




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 Re: 9N Hydraulic Question in reply to Larry in Ark., 06-14-2020 19:42:15  
Quoting Removed, click Modern View to seepull the control valve out and clean behind it.



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