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Ford 9N, 2N & 8N Discussion Forum
Show Parts for Model:

help on hydraulic pump rebild

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carlntexas

01-03-2014 07:44:28
69.46.55.250



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I needed new valve chamber valves and springs and also was replacing relive valve. I found a pump repair kit on Ebay with these in it for $100 which is less than items bought separate. The piston yokes have an extra piece on them do these go to top or bottom of pump or does it matter? Also the bushing don't have a oil slot is it going to get enough oil? Had to edit this is a 49 8N.

Here is picture new on left


The valve chamber springs are are bigger around but not as strong as original will this matter? I've never worked on a pump and kit was made in India.


This post was edited by carlntexas at 08:42:05 01/03/14 2 times.

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Hobo,NC

01-06-2014 06:12:50
173.189.216.77



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 Re: help on hydraulic pump rebild in reply to soundguy, 01-03-2014 07:44:28  
Quoting Removed, click Modern View to see

Good luck its allot of work to get back were you are at now... I would run that pump over to my new neighbors for a look see.... :wink:



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Hobo,NC

01-05-2014 07:46:19
71.30.110.22



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 Re: help on hydraulic pump rebild in reply to carlntexas, 01-03-2014 07:44:28  
Never seen a chamber valve cracked like that,,, worn but not cracked :shock:
Dunno were you are at but I would knock out the sleeves the control and exhaust valves operate in and go for the junk that gets trapped in the hydraulic circuit behind them...



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carlntexas

01-05-2014 18:40:00
69.46.55.250



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 Re: help on hydraulic pump rebild in reply to Hobo,NC, 01-05-2014 07:46:19  
Quoting Removed, click Modern View to seeI had no idea those sleeves would come out and most likely above my ability to get them out.. I have put the pump back together the chambers got a good soaking and cleaning. Like I said in an earlier post the pump was working ok before just a little slow and pulsing. If it works a little better I can live with it I'm waiting on a warmer day to put it back in.

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carlntexas

01-04-2014 08:40:05
69.46.55.250



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 Re: help on hydraulic pump rebild in reply to arnold z, 01-03-2014 07:44:28  
I'm only 13miles from Emory we are almost next door neighbors. :)



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JMOR

01-04-2014 08:43:53
72.181.173.171



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 Re: help on hydraulic pump rebild in reply to carlntexas, 01-04-2014 08:40:05  
Quoting Removed, click Modern View to seeAbout 5 miles out of Emory, toward Canton, a bit off of 19.



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JMOR

01-03-2014 21:39:30
72.181.173.171



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 Re: help on hydraulic pump rebild in reply to old, 01-03-2014 07:44:28  

carlntexas said: (quoted from post at 01:31:23 01/04/14) Address is the little town of Yantis I'm about one mile from Lake Fork.
I have a place a few miles away near Emory and kin at Alba.
This post was edited by JMOR at 21:40:18 01/03/14.



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carlntexas

01-03-2014 21:31:23
69.46.55.250



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 Re: help on hydraulic pump rebild in reply to TheOldHokie, 01-03-2014 07:44:28  
Address is the little town of Yantis I'm about one mile from Lake Fork.



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carlntexas

01-03-2014 15:48:34
69.46.55.250



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 Re: help on hydraulic pump rebild in reply to carlntexas, 01-03-2014 07:44:28  
Can any one tell me what to torque those chamber bolts to I was thinking 55lbs but that aluminum housing scares me.



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JMOR

01-03-2014 16:16:24
72.181.173.171



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 Re: help on hydraulic pump rebild in reply to carlntexas, 01-03-2014 15:48:34  
Quoting Removed, click Modern View to seeMay not comfort you, since Ferguson, but the 9N/2N pumps for ford & ferguson were interchangeable, and The Ferguson shop manual (same pump as the Fords) calls for 50-55 ft/lbs. on the valve chamber assemblies and also on the cap clamp bolt on both chambers. 38-45 lb/ft. for the pump base to tractor bolts



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carlntexas

01-03-2014 16:57:15
69.46.55.250



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 Re: help on hydraulic pump rebild in reply to JMOR, 01-03-2014 16:16:24  
Thanks JMOR I had them at 45 will go to 50 tomorrow. I got the pump back together today and all those India parts fit good. I blew some air in the chamber valves and they seemed to be holding.



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JMOR

01-03-2014 21:17:54
72.181.173.171



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 Re: help on hydraulic pump rebild in reply to carlntexas, 01-03-2014 16:57:15  
Quoting Removed, click Modern View to seeWhat part of Texas are you in Carl? We are in a big state.



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TheOldHokie

01-03-2014 17:27:19
74.110.73.195



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 Re: help on hydraulic pump rebild in reply to carlntexas, 01-03-2014 16:57:15  
Quoting Removed, click Modern View to see

You know India is capable of world class engineering and really close tolerance machining when they want to - things like nuclear bombs and ICBM's for example :roll:
TOH



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Jimps

01-03-2014 09:45:14
99.194.102.58



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 Re: help on hydraulic pump rebild in reply to carlntexas, 01-03-2014 07:44:28  
Carl,

I replaced my pump pistons in 2012 and got the same type of replacement pistons with the extra piece. Those pistons also fit a Ferguson hydraulic pump and I have been told that those pumps use a guide rod to help keep the pistons in line. They are not used in the 8N pump. I just pointed mine down. Just make sure they clear the bottom of the pump chassis. I slathered the bushings with oil before assembly, just to make sure they had a light coating before trying to start. I also pre-oiled everything I could get to in the pump, just in case. I think the bushings have enough clearance to pull in a little oil as they move back and forth.

I found that my old valve springs were stronger than the replacement springs so I used the old ones. My logic was that since the spring is used to force the valves closed once the pump pressure is diminished, stronger springs would probably help keep pressure in the system. My rebuilt pump works great now.
Here is a link to my question on the valve springs:

Hydraulic Pump Valve Springs

Hope this helps.

Jimps in GA.
This post was edited by Jimps at 09:55:20 01/03/14 2 times.

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carlntexas

01-03-2014 10:08:33
69.46.55.250



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 Re: help on hydraulic pump rebild in reply to Jimps, 01-03-2014 09:45:14  
Using the old springs is what I planed on doing since they had worked fine for 65yrs. I hadn't planed on replacing the yokes and bushings but since they came with the kit I'll use them. It's amazing how little wear there was on these after all those yrs. Pump was still working ok just had some pulsing from the worn and pitted chamber valves.



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