WD Hydraulics delay
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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=144570
Printed Date: 28 Aug 2025 at 3:57pm
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Topic: WD Hydraulics delay
Posted By: Alberta Phil
Subject: WD Hydraulics delay
Date Posted: 18 Nov 2017 at 6:36pm
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After many years of steady use, the hydraulic pump on my WD seems to have suddenly developed a problem in that when the lift lever is moved to the lift position, it takes about 20 seconds for the rams to start to lift. This started about a week or so ago as up to that time it always lifted right away. It has an Allis trip loader on it and is my main snow pusher. I just had the lift rams rebuilt with new seals and shafts, but it started doing this before then. I drained the old hydraulic fluid and put in new fluid today and no difference. Any ideas of where to look? |
Replies:
Posted By: MACK
Date Posted: 18 Nov 2017 at 9:52pm
| Take the pump off and go through it. Replace all the check ball springs and Orings. Check pumping plungers for broken springs. Clean it up, put it back on. Should be good for another 67 years. MACK |
Posted By: Alberta Phil
Date Posted: 18 Nov 2017 at 11:08pm
Thanks, Mack. I thought something may have gone out of adjustment on the linkage. I've got about three pumps on my parts shelves, so I'll go through the best one of those and then just switch them. Won't have to have the tractor down too long that way! |
Posted By: EPALLIS
Date Posted: 19 Nov 2017 at 10:29am
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A 20 second wait on the rams lifting on a 67 year old tractor? I guess my expectations are pretty low, I wouldn't think too much about that......... Besides, are you in a cold climate? When it gets down in the 20-30's like it is here now, it could easily take 20 seconds for the ram to raise if they sit outside. They do need to warm up. My 2 cents on the topic.
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Posted By: Gary
Date Posted: 19 Nov 2017 at 4:42pm
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Cold climate - Alberta, CAN. ?? Heck no, they are in a heat wave right now, about 40' F. LOL Gary |
Posted By: Alberta Phil
Date Posted: 19 Nov 2017 at 6:39pm
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It always lifted pretty well without delay. Well, it might have been a little slow at 20 below!! This was a $1500 dollar tractor that has seen a lot of use in the 15 years that I've had it. It's always been very dependable and still is on it's original 6 volt system. |
Posted By: Bill Long
Date Posted: 19 Nov 2017 at 7:56pm
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I know there is better oil out there but when we sold them and it really got cold - to us in Maryland 0 - 10 degrees - we would put 10W non detergent oil in the hydraulic compartment of the WD. Worked better. Course that was almost 70 years ago. I do not know what type of oil is out there but if it can be thinner it would help. Also, I have to agree with Mack. A good cleaning of the pump cannot hurt and may make it run even better. Be sure to check the plungers, springs, valves, and o-rings. Good Luck! Bill Long |
Posted By: Alberta Phil
Date Posted: 20 Nov 2017 at 6:23pm
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I used the WD again today and the pump seems to be working. I have a loader on this tractor and have the Oxnard blade mounted on the back. I select loader or rear blade with a diverter valve mounted on the side of the battery box. This setup has worked great for years. Today I noticed the delay is when using the loader. When switched to the rear blade, as soon as I lift the control lever on the quadrant, the blade lifts instantly. This diverter valve is fed directly from the pump and one side is plumbed to the rear lift cylinders and the other to the loader lift cylinders. I can't understand the delay only on one side. When I installed the rebuilt loader lift cylinders, I ran them through the full stroke up and down several times so I don't think it's a trapped air issue. Those cylinders should be self bleeding I think. |
Posted By: CTuckerNWIL
Date Posted: 20 Nov 2017 at 7:30pm
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Is there any way you can switch the ports on your diverter so the loader works from the port the lift arms are hooked to 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: Bill Long
Date Posted: 20 Nov 2017 at 8:19pm
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Could you have a small leak in the connections. We had a D-14 Industrial with a front end loader and was not working right. Did what I thought was everything. Still problems. Happened to be looking at the small return nipple - which was on an exposed front mounted pump behind the front bumper. The owner ran the tractor into truck sides when loading. You can imagine this lightly fractured the nipple and caused an air leak. Went to a hardware store got a pump nipple, replaced it, ran fine. Take a good look. Could be a problem. Good Luck! Bill Long |
Posted By: Ted J
Date Posted: 21 Nov 2017 at 7:58am
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On my WD45, I have a diverter also and the bucket is the last to go up. ALWAYS.... I put the lever up and the lift arms go up first and then the loader goes up. It's always been this way. If I remember correctly, it worked the same way without the valve in there.... I wouldn't even worry about it. ------------- "Allis-Express" 19?? WC / 1941 C / 1952 CA / 1956 WD45 / 1957 WD45 / 1958 D-17 |
Posted By: Alberta Phil
Date Posted: 25 Nov 2017 at 6:02pm
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Just a bit of an update. I've been using the tractor the last couple of days and it seems to be working OK now. I had to top up the hydraulic reservoir a couple of times but now it's staying up so it must have been some air in the system that had to work it's way out. Nice to have the cylinders not leaving marks wherever it was parked!! Thanks for the replies. |