WD45 Loader goes up don't go down
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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=54201
Printed Date: 15 Nov 2024 at 7:48pm
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Topic: WD45 Loader goes up don't go down
Posted By: Thad in AR.
Subject: WD45 Loader goes up don't go down
Date Posted: 25 Jul 2012 at 6:48pm
I got the hydraulic hose on my WD45 rear lift cylinder tonight and filled it with oil so I could try the lift and try the loader. The loader came up first then the lift arms. When I pushed the control lever down nothing happened. Even with the lever down it still sounds like the hyd pump is still pumping. With the motor turned off I checked all the linkages and everything is moving as they should. an adjustment could be needed but everything is moving. It doesn't have a friction block on the quadrent so I can feel 3 positive stops when I move the hyd lever. Any ideas?
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Replies:
Posted By: Thad in AR.
Date Posted: 25 Jul 2012 at 8:26pm
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I just wanted to add that the rear lift doesn't go down either. I've been looking at the IT book and I think it's a problem with the hold valve. I've adjusted the linkage and the control valve screw but no luck yet. I'm afraid to drive it until I can get the pump to stop. Should I pull off the hold/control valve and clean it up? can parts be bought got the pump or valves? |
Posted By: Larrywdin
Date Posted: 25 Jul 2012 at 9:38pm
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I had that problem once, and it turned out a roll pin came out of the back linkage inside of the relief valve mech...
I'd post a picture, but I don't have it handy right now,,,
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Posted By: ctbowles58
Date Posted: 25 Jul 2012 at 9:43pm
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it could be a plunger in the pump i had this happen once i pecked on the pump with a hammer and its been working now for about 15 yrs. ------------- 190XT 2WD45 WF D15 D14 CA BIG10 302 & 303 bailers 77G rake 80R mower 6 plows and alot more |
Posted By: KenBWisc
Date Posted: 26 Jul 2012 at 8:53am
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When it happened to me it was due to a sheared bolt in the in the Traction Booster linkage.
------------- '34 WC #629, '49 G, '49 B, '49 WD, '62 D-19, '38 All Crop 60 and still hunting! |
Posted By: Thad in AR.
Date Posted: 26 Jul 2012 at 3:59pm
| I see linkage from the tb to the valve on the pump that has a long slot. I assumed this slot would slide on a pin but I need to go look to see if this is just an adjustment. |
Posted By: CTuckerNWIL
Date Posted: 26 Jul 2012 at 4:29pm
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I have read posts about screwing the front screw on the valve, all the way in and out a couple times to cure that???? Can't find the post now.
------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: Thad in AR.
Date Posted: 26 Jul 2012 at 7:01pm
| Thanks Charley. I'll try that this weekend. I need to let the loader down first to let the pressure off. Will the screw come all the way out or does it stop? When I get it working right I'll change the hyd fluid. |
Posted By: Thad in AR.
Date Posted: 29 Jul 2012 at 9:23am
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I have unscrewed the screw several times and tapped on the valve with a brass hammer I've unhooked all linkage and wiggled all the valves and still nothing. I noticed today that if I put alot of weight (me) on the 3pt it goes down and the loader goes higher and when I step off the 3pt the loader goes back to where it was. The pump still never quits putting out pressure when it's running.
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Posted By: Thad in AR.
Date Posted: 29 Jul 2012 at 9:27am
| One more thing. I can unscrew one of the plungers on the end and it would let the adjustment screw come out further. Would it let it unscrew all the way out? Should I just remove the pump and rebuild? |
Posted By: CTuckerNWIL
Date Posted: 29 Jul 2012 at 9:46am
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I would guess the unloading valve plunger is stuck. probably have to take it apart and clean it up. ------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: Thad in AR.
Date Posted: 29 Jul 2012 at 1:00pm
| Charley I snuck out to the shop for a few minutes and broke the 2 bolts loose that hold the valve on top. I wiggled it loose and still nothing happened so I know that the plunger in this valve is stuck. I'll pull it off as soon as I get a chance. |
Posted By: Thad in AR.
Date Posted: 29 Jul 2012 at 1:48pm
| Update the adjustment screw in the valve on top was bent on the small area that goes inside the spring. I put it in a vice to straighten it and it broke off very easy. I need a new valve or the adjustment screw. I was able to retrieve the check ball with a magnet. |