Allis monoframe plow question
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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=20004
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Topic: Allis monoframe plow question
Posted By: Dale
Subject: Allis monoframe plow question
Date Posted: 27 Oct 2010 at 5:38pm
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My new to me AC 2000 monoframe plow has the nitrogen charged accumulator system for the hydraulic resets. I opened the valve and some milky/creamy colored oil came out of the quick disconnect that you use to charge the system. I immediately think of water in the hydraulic oil. I speak to a local plow salvage/dealer who seems very knowledgeable. He says that's normal (he says its foam) and means the accumulator is working. He said that the nitrogen reacts with the oil. I said I thought there was a bladder between the nitrogen side and the oil side so how can there be a reaction? Can anyone explain what's going on here. My gut still says there must be water in the oil to make it milky. If I'm correct and it is water how do you flush the system on the plow. I don't want to charge the system and have that milky stuff mixing with my tractor's hyd oil. Any advice would be appreciated.
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Replies:
Posted By: maytag
Date Posted: 27 Oct 2010 at 6:11pm
Not sure what type accumulator you have but have to assume it is a bladder type as is most common with mobile equipment. If you have
oil, milky or good coming out a gas (N) port more you have a bad bladder.
HTH,
Tom
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Posted By: Dale
Date Posted: 27 Oct 2010 at 6:17pm
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The milky oil came out the hyd oil fill port (when I cracked open the valve and the male connector seeped a bit) not the gas side. I believe it has a bladder too which makes me think that there can't be a reaction with the nitrogen as much as it is contaminated with water. But again this is all new to me.
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Posted By: maytag
Date Posted: 28 Oct 2010 at 11:55am
The N and oil are seperated by the bladder so there is no reaction, milky oil as you suspected is contaminated with water. No good way to flush thru there without disassembly of the accumulator but it would be time well spent and replace the bladder while you are at it.
HTH,
Tom
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Posted By: sandylakeimplement
Date Posted: 28 Oct 2010 at 12:37pm
The milkiness would be caused by moisture in the oil not by nitrogen but the nitrogen bladder may be ruptured after all these years. Feel free to call me about how to check the nitrogen side. 724-376-2489 Bill @ S>L>I
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Sandy Lake Implement
Sandy Lake, PA
724-376-2489
www.sandylakeimp.com
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