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There has to be some valve assembly incorporated into the seat pivot in order to change the steering direction when the seat is rotated. If the seat/steering column is facing the engine end of the tractor and I turn the steering wheel clockwise the cylinder on the left side of the tractor must lengthen to make the tractor turn to the right. After I turn the seat/steering column around so that I am facing away from the engine my left hand is now on the opposite side of the cab. I turn the steering wheel clockwise to make the tractor turn to the right the cylinder on my left side must lengthen. That is the right side the tractor as viewed from the original position.. That is the opposite direction for the cylinder movement with the same clockwise motion on the steering valve. There has to be more involved than two cylinders and the gerotor steer valve. I believe that this problem has got to be some kind of leakage in the seat/steering column pivot value. I need someone with actual experience with these tractors as this seat value assembly appears to be very difficult to get at. Do I have to lift the cab? Can the valve be reached from inside the cab by removing the seat? If the problem is leakage within one or both of the cylinders how then can you explain the fact the problem only happens in one direction and that I can switch that direction by switching two of the lines between the seat rotation value and the steering gerotor valve?
I will check for bypassing oil in the cylinders tomorrow. If there is a cylinders leaking problem it is intermittent (i.e. not always there), one way (i.e. only leeks in one direction) and at time huge (i.e. almost as fast as I can turn the streaming wheel). It should be easy to prove by removing the hose from the outlet side of the cylinder after the cylinder is moved to full stroke. I will Accept your answer if that proves to be the case.
Yesterday the weather here turned terrible winds gusting over 110km/hr cold and snowing. Trees down, damaged property all over the area. The electrical power was off and on several times yesterday and for most of last night
I have considerable experience with repairs on heavy equipment many different repairs on many different trucks and tractors over the last 30 years. What I was hoping for was advice from someone with considerable experience with this particular type of tractor as it is quite unique ( the seat/steering column can pivot around and fact the opposite direction in the cab).
I did get a chance to test for bypassing oil in the steering cylinders this morning. There is no oil coming from the return side of ether cylinder after the cylinders have moved to full stroke i.e. no sign of leakage within either cylinder.
I have located a hydraulic diagram for the tractor. I now suspect the problem is related to the signal line that connects the steering valve and the steering relief / priority valve. Therefore it could be related to a problem in the steering value, rotating seat base value (unlikely), or the steering relief/ priority value.
Anyway I am 100% sure this problem has nothing to do with leaking steering cylinders.
One of your email just said "hotlinking from this site is forbidden" I don't even know what that means
I cannot get on the CNH Dealer online parts catalog that you sent me a link to. All I get CNH Dealer Online Parts Catalog - Error
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