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JD m relief valve settings, how to???


 
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Cody2012
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PostPosted: Tue Nov 13, 2012 6:41 pm    Post subject: JD m relief valve settings, how to??? Reply to specific post Reply with quote

I am working on the touch system etc.... It came to me in pieces, I got new seals, gaskets etc....... The book says the relief valve needed to have the turns counted when it came out for properly putting it back together, I didn't take apart so I have no clue, can anyone help me get this part figured out, is there a standard setting! How many turns do I go, what do I need to do to get relief valve and it's lock screw etc proper set up, so I can put this back together, thanks
 
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M-MAN
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PostPosted: Tue Nov 13, 2012 10:40 pm    Post subject: Re: JD m relief valve settings, how to??? Reply to specific post Reply with quote

You've got a problem for sure. I have a late model one on the shelf so I checked and the lock is about .010 below the housing surface. You'll need to pressure check it after you get it all back together to see how far off it is. Too high and you'll blow the pump seal. Too low & it won't have enough umph. Good luck.
 
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Rusty wheel
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PostPosted: Wed Nov 14, 2012 8:54 am    Post subject: Re: JD m relief valve settings, how to??? Reply to specific post Reply with quote

I just dug out my service manual 2013 and read about the relief valve setting. This book covers the model 40. To adjust the relief valve setting, first, adjust relief valve pressure for remote system to 1040 to 1080 psi. Then add .060 shim to provide relief valve pressure to excess of 1080 psi while touch-o-matic relief valve is being checked. THE .060 SHIM MUST BE REMOVED AFTER TESTS ARE COMPLETED. DO NOT MOVE REMOTE CONTROL VALVE LEVER WHILE THESE SHIMS ARE IN THE VALVE AS DAMAGE MAY RESULT. Raise the draft links until the lift arms are parallel to floor and block them up.Move control lever forward and remove the 1/2 inch pipe plug from valve housing. Install a 3/8 inch pipe plug into the tapped passage directly below the plug just removed. Then install a hydraulic pressure gauge which will measure at least 2000 psi into the opening from which the 1/2 plug was removed. With the control lever in forward position, start tractor and let it reach it's normal operating temperature. Move enging speed control lever to wide open and while observing pressure gauge, slowly pull the tom control lever to the rear. Relief valve operatijng pressure should be 1040 to 1080 psi. A audible "whir" will be noted when relief valve opens. If the relief valve operating pressure needs to be reset, drain oil and remove rock shaft housing. Reset the pressure by turning the adjusting screw in to increase and out to decrease the pressure setting. Use special wrench to set and lock relief valve adjusting s and lock screw. NOTE one complete turn of the adjusting nut against the relief valve spring increases the pressure 120 lbs. When removing the pressure gauge after pressure has been set be sure all pressure has been relieved by stopping engine and moving control lever forward as far as possible. Remove the 3/8 pipe plug and reinstall the 1/2 pipe plug and tighten securly.
 
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M-MAN
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PostPosted: Wed Nov 14, 2012 9:15 am    Post subject: Re: JD m relief valve settings, how to??? Reply to specific post Reply with quote

Wrong tractor. M pressure readings are 740 to 760 for ser# up to 46205. After that it is 820 to 860 with the exception of ser# 46546 to 46645 which is the earlier pressure reading.
 
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Rusty wheel
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PostPosted: Wed Nov 14, 2012 3:47 pm    Post subject: Re: JD m relief valve settings, how to??? Reply to specific post Reply with quote

Maybe you could just put the plow on it and set the pressure so it will lift it. If the hydraulic system heats up more than normal you'll know the relief valve is set too low. I know the 40 is not a 320. but I thought the procedure for adjusting the pressures would be the same or very similar.
 
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Cody2012
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PostPosted: Wed Nov 14, 2012 5:13 pm    Post subject: Re: JD m relief valve settings, how to??? Reply to specific post Reply with quote

I am restoring this tractor thatwas giving to me in pieces, haha, I am priming and assembling various parts, this touch system is off the tractor right now, and I can't test it until I paint it all and get it all together. But since I have it apart, I thought I would put together but read in manual about how many turns, how many turns should I screw it in just to try, or basically start from, I will assemble it, put in on tractor, paint it all, finish tractor, start tractor see what happens?
 
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