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AC 190 hydraulic issues |
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DrAllis
Orange Level Access Joined: 12 Sep 2009 Points: 19595 |
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Posted: 01 May 2024 at 2:37pm |
Remove the pump. Find someone who is capable of going thru it. Explain to them the problem is only on the lift section and not the power steering or Traction Booster pumps.
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Allis Eli
Bronze Level Joined: 17 Apr 2024 Location: MN Points: 27 |
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so what would be your recommendation on Redoing the pump?
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DrAllis
Orange Level Access Joined: 12 Sep 2009 Points: 19595 |
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Back off the relief valve before you forget. Not a plugged screen or filter. Your power steering works fine so that ain't it.
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Allis Eli
Bronze Level Joined: 17 Apr 2024 Location: MN Points: 27 |
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hey everyone update on the 190. I tested the relief valve at 2000 rpm and I was getting less psi than before only peaked maybe 1000. I tried adjusting it but nothing, I turned it in 1/2 turn per time . I turned it in 3 whole turns in and psi stayed the same. I am guessing pump needs a rebuild. previous owner did put in new plates so I am wondering if maybe the suction screen is clogged or?
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Allis Eli
Bronze Level Joined: 17 Apr 2024 Location: MN Points: 27 |
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okay will do
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DrAllis
Orange Level Access Joined: 12 Sep 2009 Points: 19595 |
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Multiple times you were told to check pressures at 2,000 rpm or more. Why aren't you ?? Never have you said who you bought the tractor from had just been thru the hydraulic pump. This would have been nice to know. A 3K gauge is better than a 5K gauge. Re check at wide open throttle. Adjust the relief valve "in" 1/2 turn at a time and if you cannot reach 2,000 psi you have PUMP trouble.
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Allis Eli
Bronze Level Joined: 17 Apr 2024 Location: MN Points: 27 |
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hey everyone. I am wondering about my 190 hydraulics again. my gauge from Napa reads only 1200 psi. I installed a relief valve that is supposed to be pre set at 2000 psi. however when the tractor is running 1400rpms If I engage the remotes it strains the engine. gauge still only reads 1200 psi. could the gauge not function properly if there is air or something in it? it is a 5k psi gauge. or is the hydraulic pump going out? the previous owner did redo the pump so I am guessing It is still good. thanks
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Allis Eli
Bronze Level Joined: 17 Apr 2024 Location: MN Points: 27 |
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I got a good gauge 5k psi gauge plugged into the remotes. so I will just install it and test carefully from there
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GSTROM99
Silver Level Joined: 12 Dec 2020 Location: Greene, IA Points: 228 |
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You can't guess what the pressure is. Like voltage, you need to measure it. 3k psi gauges are available almost everywhere. Amzn is a good source. I ordered a 5k psi gauge (for my D-17 hyd issue) from my local NAPA (I like to shop local whenever I can). The fittings were the challenge.
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DrAllis
Orange Level Access Joined: 12 Sep 2009 Points: 19595 |
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No. If it is supposed to be set at 2,000, it should be at 2,000. CAREFULLY and GENTLY ease into your remote lever with a 3,000 psi gauge and do NOT exceed 2300 psi. In fact, the truth of the matter is this......if 2,000 psi system pressure will lift the heaviest item you have, the hydraulic pump will last longer at 2,000 psi than it will at 2,300 psi.
Edited by DrAllis - 25 Apr 2024 at 2:20pm |
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Allis Eli
Bronze Level Joined: 17 Apr 2024 Location: MN Points: 27 |
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thanks Dr allis. also the new relief valve is supposed to be pre set at 2000 psi. I assume I would still want to back the screw out and pressure test it then and add pressure little by little?
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DrAllis
Orange Level Access Joined: 12 Sep 2009 Points: 19595 |
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Rear cartridge is the main relief valve.
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Allis Eli
Bronze Level Joined: 17 Apr 2024 Location: MN Points: 27 |
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hey all. I decided to bite the bullet and order a new relief valve from A&W tractor. which relief valve do I need to take and and put in the new one. is it the Relief valve on the back of the valve stack or front? thanks
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DrAllis
Orange Level Access Joined: 12 Sep 2009 Points: 19595 |
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Failure to be able to adjust the main relief valve to the proper pressure with the engine at 2,000 RPM would indicate the hydraulic pump lift section has a problem.
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Allis Eli
Bronze Level Joined: 17 Apr 2024 Location: MN Points: 27 |
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thanks Dr Allis
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DrAllis
Orange Level Access Joined: 12 Sep 2009 Points: 19595 |
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Relief valve must be set for 2,200 to 2,300 PSI. Top link for the three point hitch should be in the TOP hole on a factory three point hitch.
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Allis Eli
Bronze Level Joined: 17 Apr 2024 Location: MN Points: 27 |
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hey everyone today I hooked up a three point tiller to my 190. I lifted it fine its a larger one 400-500lbs. It still won't lift a round bale. do you think the relief valve is maybe just out of adjustment? if it is how would I adjust it. I am assuming I would get a 3,000 psi gauge and put it on the remotes and them turn the screw in for more psi and out for less?
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Allis Eli
Bronze Level Joined: 17 Apr 2024 Location: MN Points: 27 |
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hey everyone I did some more research on the hydraulic relief valves for my 190 and found that A&W tractor has a brand new relief valve for 115$ or I could just spend 100$ on seals. would you guys by the whole relief valve or just the seals. I feel like it would be much easier just to install the new relief valves them taker the old ones apart and install new seals. thanks
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EPALLIS
Orange Level Joined: 12 Sep 2009 Location: Illinois Points: 1117 |
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I think most on here have "their issues with AGCO". However, at the end of the day and when all is said and done, I am so grateful they are still here and servicing 60 year old tractors. Not all companies would do that. Good luck and hope the repair goes well!
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ac fleet
Orange Level Joined: 12 Jan 2014 Location: Arrowsmith, ILL Points: 2218 |
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Might pay to get the right stuff and not have to do the job over again with possible more damage the next time! I just paid $75. at IH for a z-turn mower ignition switch that should have been $20 tops, BUT at least it works so I guess the dealers gotta have somebody pay for their fancy stores! The choice is yours!
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http://machinebuildersnetwork.com/
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DrAllis
Orange Level Access Joined: 12 Sep 2009 Points: 19595 |
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As with ANY relief valve rebuilding, I never change the adjustment screw from where it was unless pressure testing reveals otherwise. Ease a remote lever (with 3000 psi gauge plugged in) into engagement SLOWLY ( at 2,000 RPM) to see what you have and do NOT exceed 2200-2300 psi or you will explode the hydraulic pump.
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Allis Eli
Bronze Level Joined: 17 Apr 2024 Location: MN Points: 27 |
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okay sounds good I will order the good ones
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DrAllis
Orange Level Access Joined: 12 Sep 2009 Points: 19595 |
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I don't like their prices either, but how much screwing around does one want to do to try and duplicate the correct parts ???
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Allis Eli
Bronze Level Joined: 17 Apr 2024 Location: MN Points: 27 |
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okay so you would recommend just biting the bullet and getting the 100$ set from Agco
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DrAllis
Orange Level Access Joined: 12 Sep 2009 Points: 19595 |
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There is at least ONE split back-up ring and you aren't going to kind that very easy. They are not "cheap" quality Orings.
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Allis Eli
Bronze Level Joined: 17 Apr 2024 Location: MN Points: 27 |
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so your saying that you just bought some cheap orings that were close to the right size? I have a lot of good orings I am just not sure if they are hydraulic rated or whatever. thanks
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ksbowman
Silver Level Joined: 19 Mar 2013 Location: Paola, Ks Points: 226 |
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When I rebuilt the relief valves on my 180 I just used the ones out of my O-ring kit. That was about a year ago and it is still working great.
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SteveM C/IL
Orange Level Access Joined: 12 Sep 2009 Location: Shelbyville IL Points: 8034 |
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It will be money well spent. It gives your tractor back. A year from now you'll not know it.
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Allis Eli
Bronze Level Joined: 17 Apr 2024 Location: MN Points: 27 |
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okay thanks
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AC720Man
Orange Level Joined: 10 Oct 2016 Location: Shenandoah, Va Points: 4668 |
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I remember those being really expensive when we rebuilt Mutts, I mean crazy expensive from AGCO. The parts book or an AGCO dealer can verify the part number.
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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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