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AndyD 
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 Topic: 8030 fwa hard steering
Posted: 16 Nov 2024 at 10:17pm |
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Curious if anyone has any insight on an 8030 fwa that I have. Was filling in a trench and dropped front tire in, steered out and now I have very stiff power steering. I changed filters and checked pressure at cylinder and only have 820psi with hoses hooked together and left turn. Book says it should be 1800-2000 when checking steering relief valve pressure. What would be next thing to check from this point. Thanks in advance
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DrAllis
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Posted: 16 Nov 2024 at 10:20pm |
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Hoses must be plugged to test relief, not connected together. Place the gauge on the end of one hose at a time and steer it to see what relief pressure is.
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AndyD
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Posted: 17 Nov 2024 at 7:31am |
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Then I get 750 psi.
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DrAllis
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Posted: 17 Nov 2024 at 8:16am |
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So, right there is why your steering is hard. I'd guess if you jacked both front wheels off the ground it would steer more like normal. The relief valve is in the steering orbitrol I think. Also, your steering pump could have blown internal seals which would act the same way.
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AndyD
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Posted: 17 Nov 2024 at 8:28am |
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With wheels off ground it's a little better but still not how it should be. Where can a guy get parts for these? Seems in my neck of the woods it's getting tougher.
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DrAllis
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Posted: 17 Nov 2024 at 8:31am |
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If it still isn't right with wheels up, I might be leaning towards a pump issue. The shock/back pressure of that wheel falling in the ditch may have been too much for the relief valve and got to the pump. An AGCO dealer is the only chance of repair parts short of the salvage yard.
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AndyD
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Posted: 17 Nov 2024 at 9:26am |
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Thank you sir I really appreciate it. If I would take the pressure hose off at the steering valve and check it that should tell me if the pump is good or not right?
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DrAllis
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Posted: 17 Nov 2024 at 11:10am |
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Can't do it that way. If the pump is good, dead-heading it will destroy the pump a couple seconds after starting the engine.
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DrAllis
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Posted: 17 Nov 2024 at 11:22am |
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If you could place a shut-off valve and gauge between the pump and orbitrol and slowly close the shut-off valve to see if you can reach 1600 psi or not (before the shut-off valve), that would confirm pump OK or not OK. This would be kind of risky but would be a way to test it without a dealerships hydraulic flowrater tester tool.
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AndyD
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Posted: 17 Nov 2024 at 7:17pm |
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Thanks you for all your info,much appreciated
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DanWi
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Posted: 17 Nov 2024 at 10:38pm |
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For a test like this would it tell you anything if you put a T in the steering line with a gauge, then tried to turn your wheels all the way in one direction. Just asking.
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DrAllis
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Posted: 18 Nov 2024 at 11:26am |
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If I understand the problem correctly, either the steering relief valve (inside the orbitrol) has failed (never seen that before) causing low oil pressure to the steering cylinder, or the power steering pump itself has failed, not being able to build the 1600+ psi pressure when needed. Testing/loading the pump has to be done BEFORE the orbitrol to keep the relief valve out of the testing circuit. There is a flow divider spool on the steering pump that probably should be checked to be sure it isn't stuck, but usually when that happens the scenario is a little different. And I've never had a flow divider spool stick after dropping the front wheel in a ditch.
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AndyD
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Posted: 10 Jan 2025 at 11:57am |
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Finally warmed up enough to work on 8030. I found a flow tester and checked the priority flow and with oil warm I can't get any pressure above 500psi. I checked priority valve and it isn't sticky. The relief pressure is at 1800 . So I'm leaning towards that I wrecked the pump. What are your thoughts? When I check flow with warm oil it drops down once I restrict it to get pressure. I have 200psi on priority circuit and 4.5gpm but once I load it the pressure raises but then GPM drops off.
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DrAllis
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Posted: 10 Jan 2025 at 6:28pm |
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Relief pressure at 1800 psi can't be achieved with a bad pump ?? I'd say a bad power steering pump if the flow falls off to zero.
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tbran
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Posted: 10 Jan 2025 at 7:52pm |
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Couple of years ago we had something like this, seems we found the check ball in the gear pump housing out of place - this is what allows for manual steering when the engine is off.
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When told "it's not the money,it's the principle", remember, it's always the money..
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AndyD
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Posted: 10 Jan 2025 at 10:45pm |
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Thank you I'm leaning towards pulling the gear pump off. Do they make a rebuild kit for this pump?
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DrAllis
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Posted: 11 Jan 2025 at 7:02am |
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I'm not sure what is available from AGCO these days. I believe I would get it off the tractor and be careful in disassembly and see if there is anything wrong before ordering any parts. It may be beyond fixing, or maybe it isn't the pump at all.
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