D19 snap coupler arms
Printed From: Unofficial Allis
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=10990
Printed Date: 07 Feb 2025 at 11:44am
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Topic: D19 snap coupler arms
Posted By: D-Terp
Subject: D19 snap coupler arms
Date Posted: 12 Apr 2010 at 8:11pm
| D19 snap coupler arm hydraulic problem. When I raise the arms they will not stay up they just go back down. HELP |
Replies:
Posted By: DSeries4
Date Posted: 12 Apr 2010 at 9:29pm
| Sounds like the tube that feeds the lift cylinder has a leak in it and will need to be replaced. |
Posted By: D-Terp
Date Posted: 12 Apr 2010 at 9:46pm
| Thanks. I have not notice any oil leaks but I will check it out. |
Posted By: Denis in MI
Date Posted: 12 Apr 2010 at 9:50pm
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If it is like a D-17 the tube is inside the rear end ------------- 1938 B, 1945 B, 1941 IB, 1949 C, 2 1938 WCs, 3 1950 WDs, 1951 WD, 2 1955 WD45, 1957 D-14 |
Posted By: Eldon (WA)
Date Posted: 12 Apr 2010 at 10:22pm
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The check ball and seat in the stack valve needs to be replaced. Common problem on the D19's. ------------- ALLIS EXPRESS! This year: |
Posted By: Brad Kelley
Date Posted: 02 Jun 2010 at 8:29pm
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I'm having some trouble with the hydraulic lift on my 1962 D19 diesel also. I have the 3 spool valve, but the arms won't lift when I pull up on the inner valve lever. However, if I move the traction boost lever to the top, the arms will go up slowly and lift a fair amount of weight with my boom-pole, so the traction boost plunger in the pump is working properly. The hydraulic lift lever will lower the arms. I put a pressure gauge on the remote port for the lift arm valve, but I didn't read any pressure from the main pump, and the traction boost plunger put out around 1900psi if I remember correctly. Does this sound like a stuck relief valve, or check ball problem? Do I just need my control valve rebuilt, or is it possibly a pump problem? I'm thinking about disconnecting the hard lines from the hydraulic pump and plumbing in a loop with a gauge and ball valve to see if the main pump is putting out any pressure.
By the way, this is my first post. This looks like a nice forum and I'll probably be visiting often during my restoration. Here's my tractor:
[TUBE]GqJEcWOvHQE[/TUBE]
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Posted By: Jim Lindemood
Date Posted: 03 Jun 2010 at 8:24am
| Brad - Welcome to the site. Sorry, I cant answer your question, but somebody should have some advice. Nice D19D ya got there. Your question is kind of buried in with other posts --- if you don't get help, try starting a new topic with just your question. You figured out how to post video, cool -- I'm still haven't figured it out - LOL |
Posted By: skipwelte
Date Posted: 03 Jun 2010 at 12:44pm
| Brad, be sure the knob below the single hyd coupler is scewed all the way in. It sounds like the either the relief valve is out of adjustment or the pump is not pumping on the 3 pistons. Its defenatly not a check ball problem, the check ball keeps the arms from dropping. Try screwing the relief valve in a turn or two and see if that helps. Ususally a relief valve will let it build some pressure but will open to soon and wont lift a load, it sounds like you may be pulling the pump to have a look at it. Ive got two D19s a gas and a diesel, yours sounds just like mine!!!! |
Posted By: Matt MN
Date Posted: 03 Jun 2010 at 1:58pm
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hey, Skip, Where is this "relief valve" you are talking about?
------------- Unless your are the lead horse the scenery never changes!! |
Posted By: skipwelte
Date Posted: 03 Jun 2010 at 4:37pm
| Ya know Matt, I halfta to go home and look at my D19, Im sure its on the vavle stack, but exactly which one Ill hafta look!!! |
Posted By: Eldon (WA)
Date Posted: 03 Jun 2010 at 6:24pm
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I'm pretty sure it is on the back of the stack valve to the left of the valve bodies. You have to take the nut/cap off to get to the screw inside. ------------- ALLIS EXPRESS! This year: |
Posted By: Brad Kelley
Date Posted: 03 Jun 2010 at 6:35pm
| Thanks for the replys guys. Yes, the relief valve adjustment is on the back of the valve stack above the left hand remote port. My father had the cap off and gave it a few turns both ways, but it didn't change the reading on the test gauge or change the operation of the arms. I also adjusted the control knob on the valve both ways, and it didn't make any difference. When I get a chance I'll try to plumb in my bypass loop and see if there's any flow, but I guess if there isn't I'll be pulling the pump to see what's going on inside. |
Posted By: Brad Kelley
Date Posted: 29 Sep 2010 at 2:07pm
I discovered the problem with my hydraulics:
 Luckily, I have a used pump that I bought on ebay. The cam shaft appears OK, but there has been some heat generated by these rollers.
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Posted By: skipwelte
Date Posted: 29 Sep 2010 at 3:03pm
| That was the next place to go Brad. Not to often do the rollers go bad as they run in oil all the time. You might want to take it apart and replace the oring and be sure to look at the check ball springs as they are pretty lite and are probably broken. Dont be afraid, just lay it all out on the clean bench, clean it up, put it back to together. A parts book helps a lot on reassembly. good luck |