200 has no hydraulics
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=203660
Printed Date: 22 Nov 2024 at 5:09pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 200 has no hydraulics
Posted By: 7060
Subject: 200 has no hydraulics
Date Posted: 14 Oct 2024 at 5:16pm
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I have a 200 that lost hydraulics and 3 point. It had milky oil in it when I got it and the power director valve and pto valve spools were sticking. I polished those up and I have everything but remotes and 3 point. I can move the traction booster lever and the 3 point raises though. Can I check pressure somewhere with the gauge?
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Replies:
Posted By: 55allis
Date Posted: 14 Oct 2024 at 5:20pm
Sounds like a plugged filter to me, have you changed it?
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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Posted By: AC720Man
Date Posted: 14 Oct 2024 at 7:11pm
You didn’t mention that you had changed the fluid and filter? Milky means water has got into the system which is why you have valves sticking most likely. If you haven’t I would do that first before you start troubleshooting. Fluid needs to be correct, make sure you clean the sump screen.
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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: 55allis
Date Posted: 14 Oct 2024 at 7:37pm
Might need to flush it?
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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Posted By: 7060
Date Posted: 14 Oct 2024 at 7:43pm
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It has new agco 821xl and new filter.
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Posted By: DrAllis
Date Posted: 14 Oct 2024 at 8:27pm
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If the power steering and Power Director clutch work fine, I'd ask if the 3-point hitch, when fully lowered, will raise to the top with the engine running wide open and NO LOAD on the hitch ???
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Posted By: 7060
Date Posted: 15 Oct 2024 at 8:36am
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Three point won’t move at all. With a gauge plugged into the remote there is zero pressure with the levers either. The three-point will raise to the top if you move the traction booster lever. I swapped relief valves with the traction booster and nothing happened. Where could I tee the pressure gauge in? I don’t have a service manual for a 200.
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Posted By: DrAllis
Date Posted: 15 Oct 2024 at 8:54am
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There are two pumps. A main pump (about 18 GPM) and the Traction Booster pump (about 2.5 GPM). Obviously the Traction Booster pump works, albeit slow, like it should be. If the power steering, power director and PTO all work, the main pump is at least working some. The power steering should work good with the engine at 700-800 RPM. Does it ??? If so, I'd be pulling the priority valve spool out of the rear section of the pump and make sure it is free to slide. Don't lose the orifice washer. The first 5 to 8 GPM goes to steering, PD clutches and PTO. As the engine speeds up the remaining 12 GPM goes to the 3-point and remotes when the priority valve spool shifts.
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