D10 control valve

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   I've been trying to fix these valves for years. The leaks have been a big problem. Now it's bypassing so bad it makes the 3pt hitch impractical to use. It won't hold anything up over a minute or two. I've been told by a couple of hydraulic shops, this is something you can't fix. Once the housing is worn, that's it. I'm not sure if that's true or not, but I don't know what to do for it. There isn't any seals inside. I'm thinking about putting an aftermarket valve on it. I hate to, because I will have to sacrifice the traction booster. I'd like to find one about the same size and appearance so I can try to make it look as authentic as possible.

This is the original valve and traction booster valve. I have a second on the tractor that is not much better.

This is the only diagram of this valve that I know of. I've seen it in several books and on line. Most of the parts are NLA. I had new end caps made because that was were my leaking problem was. Of course, that won't stop it from bypassing fluid back into the transmission. If there is anything you can do to slow it down I could probably live with it. Every tractor I have, the lift leaks down over some time, but not like this one. Thanks. 

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Ranse Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 11 Mar 2016 Location: Tennessee Points: 782	Post Options Post Reply Quote Ranse Report Post Thanks(0) Quote Reply Topic: D10 control valve Posted: 02 Aug 2018 at 8:48pm
	I've been trying to fix these valves for years. The leaks have been a big problem. Now it's bypassing so bad it makes the 3pt hitch impractical to use. It won't hold anything up over a minute or two. I've been told by a couple of hydraulic shops, this is something you can't fix. Once the housing is worn, that's it. I'm not sure if that's true or not, but I don't know what to do for it. There isn't any seals inside. I'm thinking about putting an aftermarket valve on it. I hate to, because I will have to sacrifice the traction booster. I'd like to find one about the same size and appearance so I can try to make it look as authentic as possible. This is the original valve and traction booster valve. I have a second on the tractor that is not much better. This is the only diagram of this valve that I know of. I've seen it in several books and on line. Most of the parts are NLA. I had new end caps made because that was were my leaking problem was. Of course, that won't stop it from bypassing fluid back into the transmission. If there is anything you can do to slow it down I could probably live with it. Every tractor I have, the lift leaks down over some time, but not like this one. Thanks.

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Charlie175 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 11 Sep 2009 Location: Shenandoah, VA Points: 6369	Post Options Post Reply Quote Charlie175 Report Post Thanks(0) Quote Reply Posted: 03 Aug 2018 at 5:51am
	Yes they are a pain and like you, no other parts/controls are like them that I have found. Do you really need TB? If not then a replacement unit should be easy enough to do.
	Charlie '48 B, '51 CA, '56 WD45 '61 D17, '63 D12, '65 D10 , '68 One-Ninety XTD

allisrutledge Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 30 Mar 2010 Location: SurgoinsvilleTN Points: 1361	Post Options Post Reply Quote allisrutledge Report Post Thanks(0) Quote Reply Posted: 03 Aug 2018 at 6:51am
	I've been thru the same thing exactly on my D10 . It is due an overhaul this winter and I have a 2 spool open center valve I plan on putting on it. I ordered it from surplus center.
	Allis Chalmers still exist in my mind and barns

Tracy Martin TN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: Gallatin,TN Points: 10936	Post Options Post Reply Quote Tracy Martin TN Report Post Thanks(0) Quote Reply Posted: 03 Aug 2018 at 8:50am
	You could machine the valve body to a slightly larger diameter holes. Then make a new plunger to fit. Not cheap, but would cure the problem. HTH Tracy
	No greater gift than healthy grandkids!

wfmurray Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 13 Sep 2009 Location: Bostic NC Points: 1225	Post Options Post Reply Quote wfmurray Report Post Thanks(0) Quote Reply Posted: 03 Aug 2018 at 1:04pm
	Sugestion.Mike area for o rings real good and compare size with S A E and metric.Metric might work better.Had air compressor at work and pop off valve leaked miked and change to metric and fixed. On relief valve reseat.Took ten thousands off my B and it holds good now.

Bobby G. Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 12 Mar 2022 Location: 28560 Points: 5	Post Options Post Reply Quote Bobby G. Report Post Thanks(0) Quote Reply Posted: 06 Apr 2022 at 6:56pm
	Can you ream the bore on those?

BrianC Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 16 Jun 2011 Location: New York Points: 1619	Post Options Post Reply Quote BrianC Report Post Thanks(0) Quote Reply Posted: 06 Apr 2022 at 7:52pm
	Can anyone suggest a repair shop, who is the best?

PaulB Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Rocky Ridge Md Points: 5276	Post Options Post Reply Quote PaulB Report Post Thanks(0) Quote Reply Posted: 06 Apr 2022 at 8:14pm
	I think I have one of those valves here removed from a parted out tractor. Although it was awhile ago and I could not vouch for the condition of the valve.
	If it was fun to pull in LOW gear, I could have a John Deere. Real pullers don't have speed limits. If you can't make it GO... make it SHINY

steve(ill) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 90811	Post Options Post Reply Quote steve(ill) Report Post Thanks(0) Quote Reply Posted: 06 Apr 2022 at 8:18pm
	the POST is 4 years old....
	Like them all, but love the "B"s.