1066 steering

I am working on a 1066 steering. It does not work ever since it got cold. I have changed the fluid and filter. It had a new mcv pump in it about two years ago. If you park it face down on a hill you can get to work but if you park on the level or up hill over night it does not work. I have read about a seal between the center section of the tractor that gets to sucking air but looked on the parts catalog and do not no where it is. The tractor is about 2 gallons over full.

Have you noticed any fluid migration? I have a 1206 and I am wondering if your power steering relief valve is stuck open? Does everything else on the mcv pump working? I think I would check pressure from the mcv pump. I just spoke to a friend and he had an O ring break and it was both dumping pressure and draining the steering system overnight. It was worse when it was cold due to the oil becoming heavier and more viscus and the pump wouldn't push the air out because it's dumping it back in the pan. Ok, just some food for thought. LarryT

The seal (O-ring) is located between the center section and the rear frame. It is listed under Drive Train, rear frame, cover, and components. Group 7, page 27, item # 18. Part number 252483R1, replaced by # 238-5218.

It takes about five to seven gallons extra to make sure this seal stays below the fluid level to keep air from leaking in.

Larry, your description matches my 706 steering problem. No P/S when cold and I have to turn right to left to get enough pressure for manual steering. How do you fix a stuck relief valve and where is it? Thanks.

I have been sitting here trying to figure out how to explain whats in my head and the best thing I can tell you is get a copy of the maintenance and overhaul manual. I spoke to Carl about his problem and what he did and he said you have to access the MCV pump area inside the case. I will try to research it more and pass on anything I find out. Luckily I have never had the problem myself, but I was talking to an old IH mechanic and he told me that to avoid hydraulic system problems in keep the system and fluid clean. He said the worse thing you can do is change fluid without changing the filters. On my 1206 I have never had any hydraulic system trouble in any way. Cold, hot, under load or unloaded. He did say that the tractors with loaders seem to give more problems if the operators are taking them off and putting them back on a lot due to contamination. So I am very careful to clean all the quick disconnects when ever I hook up. Most wipe of the males off but forget the females. I use a quick shot of solvent and I have it in a pressurized canister and just wash the fitting out. I really wish I could be of more help but as I haven't actually taken that part of my machine apart. But the valve is inside the case adjacent to the pump. Have you looked it up in your parts manual? That may help you. If you don't have one go to http://www.caseih.com/northamerica/PartsService/Pages/search.aspx and you can view it there. Hope this info helps. LarryT

Sorry to hijack the thread but I have a question. If you add the additional 5 to 7 gallon and then later you want to change the filter do you loose the 5 to 7 gallons? Normally you only loose a gallon or so.

(quoted from post at 21:46:47 01/09/11) Sorry to hijack the thread but I have a question. If you add the additional 5 to 7 gallon and then later you want to change the filter do you loose the 5 to 7 gallons? Normally you only loose a gallon or so.

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Unfortunately that is the downside of adding the extra oil. It helps if you can change the filter with the front of the tractor facing down hill.