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7520 steering

M

Mitch D

Member
We had the steering cylinders rebuilt by a hydraulic shop due to one being scored and leaking badly. While they were off, it was in the way so we started it up and backed it up out of the shed (50 feet) and shut it off. We then seen that it was pumping oil out of one of the lines that went to the steering cylinders even though we never touched the wheel. Now that the cylinders are repaired and back on it don't steer right. We have bleed it multiple times and are certain there is no air in the system. The problem is that it is slow to steer and when turning the wheel from one end to the other the tractor only steers about 1/3 of the way and then goes very slow as if it is "synchronizing" the steering wheel and cylinders. Has anyone had experience with this? Wondering if the steering valve under the dash screwed up or if something in the steering flow block down underneath that the cylinder hoses hook to got stuck when we ran it without the cylinders on.
 
It didn't change a thing. Seemed like there was some air in the scv at first but steered the same. Just tried it quick before going to plant, will try to bleed the steering again when we get caught up.
 
Turn the steering all the way to the right and hold it . This opens the Syncronising valve to let oil continue to a right turn then steer all the way to the left and then back to the full right and hold . Do this several times . This would have happened weather the tractor was moved or not .
 
There is a bleed valve on the top left of the steering valve...has a screw in the end to keep dirt out that needs removed before using the bleed valve to vent air from the steering valve
 
We have been doing that and bleeding for a half hour the first day. once it gets all the way turned you steer the other direction and it only goes 1/3 of the way, then goes slowly as it synchronizes.

Do we need to do it more times? Havent gained anything on it yet.
 
Do you let it slowly go to the other direction all the way?? this is a way it bleeds it's self..
 
It don't go all the way to the right, maybe about 3 inches of cylinder to retract. Left will go full turn.
 
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