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WD45 hydraulic pump
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Steve M C/IL View Drop Down
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Joined: 01 Jul 2010
Location: shelbyville IL
Points: 691 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve M C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2011 at 1:06am
Going from memory but mine stack is around an 1/8 in.Book talks like 7 is ballpark but I needed alot more and didn't have shims so I made one thick one out of a 5/16 flat washer and added real shims to that...it was a shot in the dark.Just remember the hole in the middle has to be as large as the real shims.
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Joined: 02 Oct 2009
Points: 28 		Post Options Post Options   Thanks (0) Thanks(0)   Quote landpainter Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2011 at 7:28am
Could you put me on list for repair sheet
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MACK View Drop Down
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Points: 7664 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MACK Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2011 at 7:48am
Had a D10 pump (almost same as WD) that would not work at all. I rebuilt it, still would not pump at all. Went down spent 1/2 day still would do nothing. Took it off again brought it home with me. Took the unloder valve out of a WD pump I had hear. Sent it home and it worked great.
 Have worked on these for 45 years and could not see any thing wrong with unloader valve, but it worked.   MACK
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Ryan Renko View Drop Down
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Joined: 12 Sep 2009
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Points: 2337 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ryan Renko Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2011 at 8:23pm
What sucks is everytime I add shims to the unloading valve in a attempt to get around 3500psi I must pull the whole pump out. Good thing we are getting like a pit crew on pulling it out!! I will order the shim kit tomorrow from Agco. Whats in the shim kit, one shim or ten??? Are they all the same thickness?? Ryan
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Ryan Renko View Drop Down
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Joined: 12 Sep 2009
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Points: 2337 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ryan Renko Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jun 2011 at 9:29pm
Got around to working on the pump today. The unloading valve had three shims on it to begin with and we were only getting around 1500psi out of it. We purchased six shims from Agco for $3.47 each!!! But the tractor is over 50 years old, so we can't complain. We added the six shims to the original three for a total of nine. Put it all together and we are pleased to say the pump was putting out 3500-3700psi before it unloaded!!! that was great but after unloading the pressure would not hold at the remote oulet, it would drop off pretty fast. It should hold shouldnt it until you lower the lever?? Do the discharge valves need to be seated?? We were glad to reach the proper psi at the rear remote and are trying to fine tune this pump.
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CTuckerNWIL View Drop Down
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Joined: 11 Sep 2009
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Points: 22825 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CTuckerNWIL Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jun 2011 at 9:38pm
Do you have a transport valve on the tractor. It could be leaking back through the return on the transport I believe. If you don't have the transport, you've got a ball and seat that don't match up right in the pump or something keeping the ball off the seat.
http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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Ryan Renko View Drop Down
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Joined: 12 Sep 2009
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Points: 2337 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ryan Renko Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jun 2011 at 9:54pm
It does have the transport valve on it. Whats the deal with it?? Some people say screw it out with pull type implements and others say the opposite.
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CTuckerNWIL View Drop Down
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Joined: 11 Sep 2009
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Points: 22825 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CTuckerNWIL Quote  Post ReplyReply Direct Link To This Post Posted: 06 Jun 2011 at 2:42pm
I've never had a tractor with the transport valve. I don't know which way is closed, I assume screwed in? If you don't use it for anything, take it off and put your hydraulic coupling directly on the end of the supply line.

Edited by CTuckerNWIL - 06 Jun 2011 at 2:44pm
http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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kffischer View Drop Down
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Joined: 26 Feb 2011
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Points: 121 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kffischer Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jun 2011 at 11:41am
Originally posted by Ryan Renko Ryan Renko wrote:

!!! 
that was great but after unloading the pressure would not hold at the remote oulet, it would drop off pretty fast. It should hold shouldnt it until you lower the lever?? Do the discharge valves need to be seated?? We were glad to reach the proper psi at the rear remote and are trying to fine tune this pump.

 that almost sounds to be normal behavior.  
But I don't have enough experience with the allis systems to give you technical advice.  The low pressure should still overcome gravity if everything is set correctly.  Also my WD operator's manual warns to not keep the quadrant lever in the lift position when using external remotes for risk of blowing the ram apart.  it says you are supposed to use the hold setting for trailed equipment.
At least you are getting somewhere now.
good luck
karl f
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Ryan Renko View Drop Down
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Joined: 12 Sep 2009
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Points: 2337 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ryan Renko Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jun 2011 at 11:52am
We have taken the pump out three times to get this problem ironed out. We are getting pretty fast at removing it!! LOL
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CTuckerNWIL View Drop Down
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Joined: 11 Sep 2009
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Points: 22825 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CTuckerNWIL Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jun 2011 at 5:06pm
Ryan, there has to be a return line from the transport valve. Find a way to watch and see if oil is leaking back to the sump through the transport valve by watching for oil in the return line. If oil is returning to the sump via this line, your transport valve is leaking. If not I assume you have a leaking check valve somewhere in your pump. Now that you have pressure, check out the transport valve first before pulling the pump off again.
http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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Ryan Renko View Drop Down
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Joined: 12 Sep 2009
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Points: 2337 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ryan Renko Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jun 2011 at 9:14pm
But CTucker, we are really getting good at removing the pump!! We could be on a pit crew!! LOL   Thanks for all the help!! Ryan
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MACK View Drop Down
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Points: 7664 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MACK Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jun 2011 at 10:12pm
The pump willnot maintane 3500 psi after unloading. They should drop back to about 1700 lbs. Then the small plunger will start pumping to maintain 1700 psi.  MACK
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Ryan Renko View Drop Down
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Joined: 12 Sep 2009
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Points: 2337 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ryan Renko Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jun 2011 at 10:26pm
Thanks Mack!! You guys have been a great help!
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kofted View Drop Down
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Points: 7 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kofted Quote  Post ReplyReply Direct Link To This Post Posted: 19 Oct 2013 at 5:49am
Could someone send me info on repairing the hydraulic pump on my WD? It works very slow. Also the loader bucket (trip) goes back down super slow.
 
Thank you,
Karl
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Could you put me on list for repair sheet helmets@accustrike.com

Edited by xwelder - 17 Aug 2017 at 10:03pm
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Allis dave View Drop Down
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Points: 3074 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Allis dave Quote  Post ReplyReply Direct Link To This Post Posted: 15 Aug 2017 at 6:44am
Best thing to do is to get an Allis WD45 service manual. It explains everything about the pump. Then download a copy of the parts manual from grandpa's tractors website. There's a link to grandpa's tractors in one of the plow knowledgebase articles.
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Joined: 11 Sep 2009
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Originally posted by kofted kofted wrote:

Could someone send me info on repairing the hydraulic pump on my WD? It works very slow. Also the loader bucket (trip) goes back down super slow.
 
Thank you,
Karl

 If you have regular 2 way cylinders on it, nothing you do to the pump will speed it up. These pumps are LOW volume, High pressure and are made for small displacement cylinders. Any 2 way cylinder I have seen takes near twice the volume of oil to move the same distance of a displacement cylinder on account of the piston size and bore size.
 How well do the the original lift arms work on the tractor?
http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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Points: 6 		Post Options Post Options   Thanks (0) Thanks(0)   Quote nbcspring Quote  Post ReplyReply Direct Link To This Post Posted: 15 Nov 2021 at 6:54am
Chris,

Just read an old post of yours on a WD45 hydraulic pump rebuild, I am getting into that repair this winter and could use a copy of your rebuild work, thanks, Brad  nbcspring@aol.com
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