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4020 steering

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Dan S.

11-12-2002 19:17:15




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My 66 4020 Diesel started having steering problems a couple days ago. The steering works perfect when you turn left, but sometimes when you turn right the wheel will turn a little ways, and then stop, and the wheels will slowly catch up to the wheel and allow you to turn a little more. Also when going straight, the tractor will ocasionally turn itself to the right. The steering box under the dash has been leaking a little oil for a while, but not a lot.

How big of a job is it to replace the seals? What is the problem with the steering, and what is the best way to go about fixing this?

thanks for your help!

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WTW

11-13-2002 07:43:43




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 Re: 4020 steering in reply to Dan S., 11-12-2002 19:17:15  
Dan, Your problem as previous stated could be in either the steering valve or the steering motor. Being your steering valve is leaking I would start there. The valve does take some know how and special tools to rebuild it. If you take the tractor to a dealer expect about a days labor just to do the valve. The leak that you mentioned could be an indication that your problem is in the valve. The seal under the steering wheel is not the cause of your leak as it is a low pressure seal not intended to handle the oil volume coming from a leaking o-ring down deep in the valve. To reseal the motor the front end / axle and one frame rail has to be removed to get access to the motor spindle and pistons to service them. Plan on about another 4 hours labor there. The last thing is bleeding the system correctly after the system has been open. This has to be done no matter which steering unit is serviced. Do not by a rebuilt or a used unit from a salvage yard Good chance it will be a bigger problem than the one you have. Your unit are very repairable in the right hands. If you were from eastern Iowa I could do them for you. Good Luck Dave W.

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JDGnut

11-13-2002 19:35:53




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 Re: Re: 4020 steering in reply to WTW, 11-13-2002 07:43:43  
Yuck.. I hate those things.. hahaa.. Like Dave said.. start with the steering valve.. if you havn't done one.. I would not recommend trying. (Not saying it cann't be done.) If you try it your self.. (or even if someone builds it.) The first time you turn it.. don't put your fingers on the inside of the steering wheel.. haha.. they have been known to turn quickly to one direction on their own, if not adjusted correctly... Good luck
JDGnut

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twopop

11-12-2002 19:35:50




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 Re: 4020 steering in reply to Dan S., 11-12-2002 19:17:15  
the steering pump,at the end of the steering column needs to be rebuilt,I would suggest you let deere do the repair



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mike

11-12-2002 19:49:23




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 Re: Re: 4020 steering in reply to twopop, 11-12-2002 19:35:50  
The first thing you need to do is find out where you problem is at, it can be in the steering motor, which is located between side frames in the front of tractor or it could be in steering valve, which is what your steering wheel hooks to. You could have leaking in steering motor piston orings, the way I check this is remove return hose to hyd oil cooler it is small hose that goes in the bootm of the top tank on cooler, be ready to cap cooler you will lose some oil, leave return hose off and start tractor turn wheel left turn , right turn you should not have hardy any oil from hose if it is running good stream you have a leak in motorfrom pressure side to trapped oil side. if you don't have any leakage take off steering column and have it rebuilt. Aftr you get tractor fixed be carefull for a while to be sure its right, If its not it'll put you in the ditch faster then you can believe.

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