Add Hydraulic gauge to WD45
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=40256
Printed Date: 12 Sep 2025 at 10:37am
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Topic: Add Hydraulic gauge to WD45
Posted By: schnogg
Subject: Add Hydraulic gauge to WD45
Date Posted: 08 Nov 2011 at 11:47am
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I've got a 1954 WD 45 that needs some hydraulic help. The problems is that sometimes It can't lift the auger, but it will once in a while. Oil isn't leaking out from anywhere, so I gather that a pump rebuild will solve this issue. I've never worked on hydraulics before, so please correct my misconceptions. I've read a bit about how to rebuild the pump on this beast. I also have a paper manual for this tractor that details the hydraulic pump. It looks doable for me. It looks like I tear it down, replace the o-rings, then try it out. If it still isn't good, I can adjust pressure with some shims, but I need a way to measure the pressure so I don't blow up my rams with the wrong shim thickness. I don't have the manual in front of me, so I am not quite sure what part gets the shim, however. Is it the "body" in the pump or the "adjusting screw" on the position hold valve seen here? http://dueyschutter.freeservers.com/photo3.html - http://dueyschutter.freeservers.com/photo3.html Can I use a standard o-ring, or does it need to be made of a special material? Does anyone how I can put a pressure gauge on the system? Where would I connect such a gauge? At the rams or is there an auxiliary port that I might use? Where would I get such a gauge? Does it make sense that to even do this? Since I couldn't find anything on youtube, I'm thinking of making a video of my progress. Any tips or experience would be much appreciated.
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Replies:
Posted By: m16ty
Date Posted: 08 Nov 2011 at 9:19pm
| Just hook the gauge to the remote outlet. |
Posted By: SteveM C/IL
Date Posted: 08 Nov 2011 at 11:27pm
| Should use 4-5000 psi guage as rated is 3750.Liquid filled is a plus too. Connect to remote outlet under seat.Somewhere I read how much one shim should raise pressure but found it not applical on my pump.It took several more. |
Posted By: Ted J
Date Posted: 09 Nov 2011 at 8:05am
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Steve, where do you put the shims??
------------- "Allis-Express" 19?? WC / 1941 C / 1952 CA / 1956 WD45 / 1957 WD45 / 1958 D-17 |
Posted By: Dusty MI
Date Posted: 09 Nov 2011 at 8:06am
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Where are you in MI. I have a 5000# gauge. Dusty ------------- 917 H, '48 G, '65 D-10 series III "Allis Express" |
Posted By: CTuckerNWIL
Date Posted: 09 Nov 2011 at 8:10am
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I can adjust pressure with some shims, but I need a way to measure the
pressure so I don't blow up my rams with the wrong shim thickness. Don't worry about blowing up your rams. I had a poorly machine replacement relief spool on my 45 and I blew up a 5000psi gauge before it bypassed. It actually bypassed at over 9,000psi. If you put the same relief spool back in and use the same shims, you will be very close to the proper pressure. I would be more worried about blowing up the traction boost gauge cause that's what happened to me. ------------- 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: CTuckerNWIL
Date Posted: 09 Nov 2011 at 8:12am
The relief spool gets the shims. I believe a .010 inch shim makes it unload 700 psi higher. ------------- 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 |
Ted J wrote:Posted By: SteveM C/IL
Date Posted: 09 Nov 2011 at 9:46am
| shims go on the nose of the unloader valve |
Posted By: schnogg
Date Posted: 09 Nov 2011 at 10:59am
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These are great responses! Is the "unloader valve" another name for the hold positioning valve or part of the old positioning valve assembly or am I simply not seeing it in the manual? I'm going to get the manual back out tonight. Does the relief spool or the unloader valve get the shims? Are these 2 names for the same part? I'm outside of Jackson. I could make it out to Charlotte one of these days. I think that I don't have a remote hooked up.
Here's a picture of the top of the unit . Is that elbow with the plug in it the remote outlet?  |
Posted By: Gary in Texas
Date Posted: 09 Nov 2011 at 3:22pm
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The remote is the elbow with the plug.
You don't have the rear outlet. The lines on you system to to the 2 point lift, works with snapcoupler or pint hitch.
The remote operated after the main lift is up, kind of a delay.
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Posted By: SteveM C/IL
Date Posted: 09 Nov 2011 at 3:34pm
| Well if remote is connected at lift cly,you'll end with the same result-sorta. Normally that supply line is the front left port on hold valve (where that galvanized elbow is).It's a steel line that runs accross the torque tube,around the battery then back underneath it right behind the hand clutch cover then bends around the sterring column post and back to a triangle plate(mounted off differential cover bolts)which has nipple welded in it to which with the proper fittings connect the line. |
Posted By: B26240
Date Posted: 09 Nov 2011 at 3:52pm
| Hope you have a good exploded view pic of pump that will help greatly to figure out where shims go, |
Posted By: Dusty MI
Date Posted: 09 Nov 2011 at 4:16pm
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[QUOTE=schnogg]These are great responses! I'm outside of Jackson. I could make it out to Charlotte one of these days. I'm leaving for Florida sometime after the 1 st. of December, and the pressure gauge is going with me, because I'm adding it to my hydraulic jack so I can check the tongue weight on my trailer. Dusty ------------- 917 H, '48 G, '65 D-10 series III "Allis Express" |
Posted By: Ted J
Date Posted: 09 Nov 2011 at 6:46pm
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Schnogg here is a gauge for you. I just bought one myself. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=260885182785 - http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=260885182785 ------------- "Allis-Express" 19?? WC / 1941 C / 1952 CA / 1956 WD45 / 1957 WD45 / 1958 D-17 |
Posted By: schnogg
Date Posted: 09 Nov 2011 at 7:10pm
| I looked at that one. Good to hear that it is a good option. |
Posted By: CTuckerNWIL
Date Posted: 09 Nov 2011 at 7:18pm
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Are these 2 names for the same part? Yes.
------------- 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 |