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Farmall & IHC Tractors Discussion Forum
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706 hydraulics

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Zach from TX

03-17-2008 17:26:30




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Does anyone know where the front oil pump gets its supply? Is it from the back pump, does it have a sump line?

thanks for the help

zach




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Zach from TX

03-17-2008 19:00:35




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 Re: 706 hydraulics in reply to Zach from TX, 03-17-2008 17:26:30  
Thank ya'll for the info.
We'll try to get her primed tomorrow then go from there. I'm sure I'll be back tomorrow with a new question.



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Zach from TX

03-17-2008 17:58:01




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 Re: 706 hydraulics in reply to Zach from TX, 03-17-2008 17:26:30  
This is the closest i've ever been to a 706.
Any suggestions, advice, comments, or any other info you might have, let me know. What else could be wrong if I get the pump primed and the steering doesn't work?
The piston was stuck in the power steering valve, got it unstuck. I'm just kinda lost on this one.



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the tractor vet

03-17-2008 18:50:35




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 Re: 706 hydraulics in reply to Zach from TX, 03-17-2008 17:58:01  
First off do you have atleast and I T manual . If you had the MCV apart I sure hope that you used all new O/Rings and Gskts. Myself when ever i go into a MCV i massure all the springs and make sure that they are to spec's and IF THEY ARE NOT then get a new spring kit and install them . Pressure must be checked and set and this will require a special hyd. fitting and a gauge that will read at least 600lbs. Myself i like to have the pressure from 245 -265 . Also make sure that you installed the O/Ring on the lower left and that the sump check plug and spring did not get lost , that plug and spring go on the lower right hand side on the bottom right . The spring looks like a ball point pen spring and the sump check plug is and off white nylon. The valves in the MCV all should slide free when they are in there bore with out there springs and should not have any back nicks of scratches. When working on any hyd. valves never ever use a rag to wi[e off any parts. Clean in gas- diesel - parts cleaning fluid and ONLY use compressed air to dry off as lint from rags can come back and slap ya in the back of the head.

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jw806

03-17-2008 17:52:42




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 Re: 706 hydraulics in reply to Zach from TX, 03-17-2008 17:26:30  
The front (mcv) pump draws oil through the same hyd. filter as the rear or hitch/aux. pump does. With the filter and the tin baffle out, you should see that there is a oil passage cast into the houseing going forward. Hope this helps.



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the tractor vet

03-17-2008 17:38:28




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 Re: 706 hydraulics in reply to Zach from TX, 03-17-2008 17:26:30  
the ft. pump on the MCV draws from the filter just like the rear pump and if you are having a problem prime then first try this . Run the engine at around 1800 RPM and turn the steering wheel to the leftand keep doing this for awhile as this will bleed off any air trapped in the system . If this does not solve the problem then your pump is getting real weak. I am coming into your problem on the back side so i do not know what all you have here . I know the 706 inside and out .

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