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Jd 4020 power steering problem

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doug

03-10-2002 22:19:36




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the steering on my 4020 gas tractor is slow in one direction. i checked the timing marks on the front steering housing and it is in the right place. the steering wheel bottoms out [stops ] in one direction, but not the other.any info would be appreciated. thanks.




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Gord Leask

03-12-2002 16:53:47




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 Re: jd 4020 power steering problem in reply to doug, 03-10-2002 22:19:36  
If the power steering is slow on a RH turn then the piston in the steering valve has leaked some oil out and has air trapped in it. The RH turn uses trapped oil in the steering valve and the steering motor. If oil is lost then the steering wheel will turn to the right and come to a stop- then the front wheels will slowly complete the RH turn. On the steering valve on the LH side under the dash there is a bleed fitting with a screw in it. Remove the screw, install a plastic line on the fitting and start the tractor. Turn the steering wheel to the RH stop position and open the fitting slowly. Let oil bleed out the line until no bubbles are present then tighten the fitting. Be careful as the steering wheel may jump after the bubbles are gone. Recheck the steering. If the problem is still there-it may be internal leakage in the steering valve or in the steering motor that is excessive. Let me know what happens.

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doug

03-12-2002 20:12:58




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 Re: Re: jd 4020 power steering problem in reply to Gord Leask, 03-12-2002 16:53:47  
gord, thanks much for the info, i will try it this weekend and let you know. you sure seem to know your way around a j deere!



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