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CA hydraulic pump volume and pressure?

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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=43407
Printed Date: 05 Sep 2025 at 9:35am
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Topic: CA hydraulic pump volume and pressure?
Posted By: Nat
Subject: CA hydraulic pump volume and pressure?
Date Posted: 08 Jan 2012 at 9:27am
I need to know the volume and pressure that a CA pump put out. anyone know?

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Nat



Replies:
Posted By: steve(ill)
Date Posted: 08 Jan 2012 at 9:43am
NO exactly, low volumn, high pressure. My B will put out 3200 psi and i doubt it puts out 1 GPM, probably half that. The CA design was similar, but pump was about twice as big so i guess less than 2 GPM. Big thing is the case only holds 8 quars of oil and you can only use about 2-3 qts so your output is about 2 GPM, for  15 seconds, then your out of oil.

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Like them all, but love the "B"s.


Posted By: Nat
Date Posted: 08 Jan 2012 at 11:18am
 Steve, I was just thinking. If I lower my kift arms all the way down and lift them hydrauicly it only taks maybe 2 seconds to raise them all the way. If the cylinders are  2in diameter that is 6.28 cu inches for the pair that is 37.68 cu  when full if the cyls have a travel of 6 inches. These are just a guess as I've never measured them.So if it takes 6 seconds from fully lowered to fully extended that would make for a volume of 376.8 per minute . if 1 gal is 57.75 cubic inches devided into the 376.8 that gives roughly 6.5 gals per minute. BUT!!! that is my way of doing math and I may be missing something or leaving something out. Does this make sense to you or am I looking at it wrong? Thanks, Nat

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Nat


Posted By: norm[ind]
Date Posted: 08 Jan 2012 at 11:26am
  it is the same cap. as a wd-wd45etc as all parts interchage in my book  3500#


Posted By: CTuckerNWIL
Date Posted: 08 Jan 2012 at 11:55am
Nat, the CA cylinders aren't 2 inches. They are simple displacement cylinders with no piston. The volume displaced is the volume of the rod that is moved, so you might want to re-figure. Probably closer to 3 gal/min.    Charlie

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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: DennisA (IL)
Date Posted: 08 Jan 2012 at 7:40pm
 The Hyd. manual doesn't give the volume but the max. psi is 4000.

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Thanks & God Bless

Dennis


Posted By: CTuckerNWIL
Date Posted: 08 Jan 2012 at 7:49pm
Dennis, I'm sure that is a recommended max psi. I know for a fact those pump will more than double that for output pressure but I don't know how long the shaft and bearings will hold up. Anybody that wants to test the shaft and bearings can just add a quarter inch of shim to the relief spool and try to measure the output. Make sure you have a 10,000 psi gauge and that you disconnect your working traction booster gauge first. Don't ask me how I know:(


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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: DennisA (IL)
Date Posted: 08 Jan 2012 at 9:14pm
  I'm sure you can go higher on psi, but I'm not sure why you would want to.

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Thanks & God Bless

Dennis


Posted By: Chalmersbob
Date Posted: 08 Jan 2012 at 10:09pm
the D15 pump is 560 cu in and is about the same size configuration as the CA pump.
Bob


Posted By: CTuckerNWIL
Date Posted: 09 Jan 2012 at 7:18am
Originally posted by DennisA (IL) DennisA (IL) wrote:

  I'm sure you can go higher on psi, but I'm not sure why you would want to.
 I don't know why anyone would want to go higher than 4000 either. The biggest problem trying to use these hydraulics for something other than they where designed for is the lack of volume.
 I didn't want or plan to go that high. A poorly produced reproduction relief spool sold by an AGCO dealer caused the problem. I'm just saying much higher pressure is possible.


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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



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