6040 hydraulic pump
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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=182961
Printed Date: 19 Dec 2025 at 7:01am
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Topic: 6040 hydraulic pump
Posted By: Carl(NWWI)
Subject: 6040 hydraulic pump
Date Posted: 31 Aug 2021 at 8:46pm
Working on a 6040 that needs a new hydraulic pump. They are NLA from agco and NLA from A&I parts. Is there another pump that will fit on this or what has anyone else done? I got 2 160 pumps hoping I could couple them together but not looking good so far.
Carl
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Replies:
Posted By: AC720Man
Date Posted: 31 Aug 2021 at 9:15pm
Have you tried Steiner or Dj’s? Seen them on eBay also. You say the pump is bad, what issue are you having? Slow or no 3pt? Not sure if the 6140 is like the 160 but have you cleaned the hydraulic filter at the seat? Follow the sump pump line to the transmission, is there a hose that connects the 2 pipes together? If it is make sure the clamps are tight and the hose is in good condition. You may be getting air in the line that’s causing the issue.
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1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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Posted By: Carl(NWWI)
Date Posted: 31 Aug 2021 at 11:09pm
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Disassembled pump and inspected. Has a lot of wear and clearance. Will not suck oil. New orings on suction lines. I can pressurize the sump and it will try to suck oil and once it seems like a good stream I let off the air and it stops pumping immediately. Had the whole suction circuit apart, all looks good and oil level good.
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Posted By: AC720Man
Date Posted: 01 Sep 2021 at 6:48am
I know on the 160 the sump tube connection at the bell housing and the filter under the cap to the right of the seat are 2 key areas that causes issues. Not sure on a 6140 as I have never seen one. Do you have a manual on yours? I wouldn’t have known about it unless I had a manual. Not sure if rebuild kits are available from AGCO? Ask your AGCO dealer if they have access to the NOS parts chain. My local dealer found me a NOS power steering line that way.
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1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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Posted By: Alvin M
Date Posted: 01 Sep 2021 at 7:17am
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AC 6040 72074620 hyd pump Google it
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Posted By: Carl(NWWI)
Date Posted: 01 Sep 2021 at 9:30am
I have googled it. When I’ve ordered discontinued parts in the past lots of places say they have them, but when you order it they don’t actually have it. Ordered the one from SSB so we’ll see if they actually have it.
And AC720MAN, it’s a 6040, not a 6140. 6140 were a different manufacturer from what I understand.
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Posted By: AC720Man
Date Posted: 01 Sep 2021 at 11:15am
My typing mistake on the model.
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1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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