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Allis Chalmers Discussion Forum
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WD-45 Hydraulics Stuck Up!!!!!!

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Paul Durbin

09-08-2006 20:08:01




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Help! Someone tell me why my Hydraulics are stuck in the up position. They will not budge! Have been stuck up for 3 weeks and won't even bleed off.




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jpscny

09-15-2006 07:09:45




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 Re: WD-45 Hydraulics Stuck Up!!!!!! in reply to Paul Durbin, 09-08-2006 20:08:01  
mine did the same to fix it I replaced 2 o-rings in the hydraulic hold valve which is bolted to the pump.
the broken o-rings allowed oil to bypass pressurizing system.



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fynney1

09-14-2006 19:06:27




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 Re: WD-45 Hydraulics Stuck Up!!!!!! in reply to Paul Durbin, 09-08-2006 20:08:01  
I screwed my front thumb-screw (see the discussion forum) all the way in - the loader stays up! I can't believe that all my connections and valves are so good that it wouldn't start coming down at least a LITTLE. ????? Is there a good place from which to drain the system? I'm not interested in making a big mess! :-)
Any guidance is appreciated!



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Obsession

09-10-2006 16:09:15




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 Re: WD-45 Hydraulics Stuck Up!!!!!! in reply to Paul Durbin, 09-08-2006 20:08:01  
Define bleed off. My WD's are stuck up too. It acts like the lever is still in the up position even if the lever is in the down position. Our WD45 did this once too. I believe a pin fell out inside the pump if I remember right. Not too hard to fix. You can sneak the pump out without pulling the frame rail off if you use some small screwdrivers to hold the rollers in while you sneak it through the gap in the frame.

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fynney1

09-10-2006 18:34:09




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 Re: WD-45 Hydraulics Stuck Up!!!!!! in reply to Obsession, 09-10-2006 16:09:15  
Mine is doing this too! Can you give any more detail regarding dropping the pump and trouble-shooting? I am assuming that I need to remove all pressure off the system before I open the pump - should I drain hydrolics first? The front thumb-screw is all the way against the housing in front of it. Will this pose a problem in dropping the pump, or will it go straight down once the bolts are out and the linkage and fittings are disconnected?
I have not worked on one of these in almost 35 years, so it is good to get info from someone who knows what is going on! THANK YOU !

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Obsession

09-24-2006 17:35:16




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 Re: WD-45 Hydraulics Stuck Up!!!!!! in reply to fynney1, 09-10-2006 18:34:09  
Turn in the thumb screw like the other John said. I tried it on mine and it worked!! I heard a click when I screwed the thumb screw in about the rounds. I had it adjusted out for plowing. You may want to relieve the presure first. BE CAREFUL!



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John Rogers

09-10-2006 17:25:31




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 Re: WD-45 Hydraulics Stuck Up!!!!!! in reply to Obsession, 09-10-2006 16:09:15  
There is a thumb screw on the front end of the pump about half way down between the clutch housing & the pump. If you screw it in it moves the valve rack and always have caused the implement to drop for me . Good luck, John in NW MO



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fynney1

09-14-2006 18:57:46




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 Re: WD-45 Hydraulics Stuck Up!!!!!! in reply to John Rogers, 09-10-2006 17:25:31  
I screwed mine (see the discussion forum) all the way in - the loader stays up! I can't believe that all my connections and valves are so good that it wouldn't start coming down at least a LITTLE. ????? Is there a good place from which to drain the system? I'm not interested in making a big mess! :-)
Any guidance is appreciated!



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loa

09-09-2006 15:26:34




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 Re: WD-45 Hydraulics Stuck Up!!!!!! in reply to Paul Durbin, 09-08-2006 20:08:01  
The return spring in the valve may be weak or rusty valve. If it has one



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Craig in MO

09-09-2006 07:45:24




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 Re: WD-45 Hydraulics Stuck Up!!!!!! in reply to Paul Durbin, 09-08-2006 20:08:01  
The '53 WD I bought this yesr had the same issue. I drained the pump, started the tractor and then they went down. Stopped the enginge, refilled and it's been fine ever since. No idea whay that worked for me but it did. Good Luck



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Reaver

09-09-2006 06:23:17




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 Re: WD-45 Hydraulics Stuck Up!!!!!! in reply to Paul Durbin, 09-08-2006 20:08:01  
Sounds like the same problem we have on our wd45 - we quite using it and have not had time to look at it...hydraulic pump always pumping arms up...put hydraulic lever up and down and it does nothing...input on how to fix this appreciated!
Reaver



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Tramway Guy

09-09-2006 05:40:22




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 Re: WD-45 Hydraulics Stuck Up!!!!!! in reply to Paul Durbin, 09-08-2006 20:08:01  
More information? Are you talking just the lift arms themselves? Without any weight to force them down, they will stay up forever.



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