- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Have you had this tractor for some time or is it a recent acquisition? The JD 4020 1969 serial numbers go from 201100-222159. Lazy power steering to one side has two commom possibilities, internal leakage in the control valve, Or, if the front end had been worked on, the tie-rods were not set to center the steering wheel when setting the toe-in. If that is the case, and the steering wheel is properly centered when driving straight or has fewer turns turning right than when turning left, the steering wheel was re-centered by removing it and resetting it on the steering shaft spline, in which case it is rarely perfectly centered. If that is the case, the control valve may not open much and restricts oil flow when turning right.
It is possible the steering cylinder piston seal leaks in one direction more than the other, or that the front wheel toe-in is wrong.
You have air in the power steering lines. Was the fluid low or do you have a leak?
Car off, in park, raise your front end, both front wheels off the ground with a floor jack. Start the engine and turn the wheel all the way right and left a couple times. Add more PS fluid if necessary and do it again. Air compresses but the fluid does not. Turning left uses almost all the fluid to push the arm out of the piston. Moving it all the way right will allow the air to escape in the fluid reservoir.
Did you disconnect the PS lines of the rack and pinion? Raise the front tires off the ground and fill the PS reservoir. Turn the steering wheel at least 10 times left and right till it stops(purge the air). Check the reservoir, fill as necessary. Do this twice. Then start the car and turn it again back and forth. Seems fine, check the reservoir again. Take a road test. Good, done. Not good let me know.
The whining noise means the pump is cavitating--sucking air. It probably needs to be bled as stated by others. Several of the Garden Tractor forums have manuals for download, or you can post a question and get an answer from someone that has experience with your machine.
I am a minor shade tree mechanic here so this is just a guess. It might be a front brake rotor, a break pad caliper that has a sticky hydraulic piston, front wheel bearing, or something else. Look at the pad and rotor wear for it possibly being a break system issue. Not sure, if you do not have a solid front axle look at the inner part of the wheel under the vehicle where the ball mates into the socket for any wet fluids or unusual gunk or build up around the axle and break calipers for a wheel bearing problem. Jack up the front end and make sure you chalk the rear tires, vehicle is in PARK and the steering wheel is unlocked as to where the steering wheel can be turned if needed. After vehicles front tires are off the ground try to pivot the front wheels to point in a different direction left turn or right turn. This can be tried by physically grabbing the tire trying to move the tire to point left or right. If the front tires are able to be pointed in a different direction without the aid of the steering wheel, then it could be a wheel bearing issue or a more serious issue. Hope you can make sense of these instructions, and hope this helps you find and fix any and all existing problems you are having with your vehicle.
If it is hard to turn in both directions check power steering pump fluid level. Also with both front wheels off the ground key on engine off, turn the tires manually at one of the front tires and turn with the steering wheel engine off. Check for binding (they will require effort to turn) you are looking for a change in effort.
Thisis a common problem, it is cause by air bubbles in the steering system. Raise the car front and put jacl stands,Be sure the tires dont touch the ground. engine not running turn the steering wheel fullleftand right for ten times. You must go full left to right or viceversa for ten ties/this will solve it
Support front wheels off ground. Chock rear tires, get an assistant for safty. Start engine (do not put in gear) step outside of car and manually turn wheels left and right by hand. Cut off engine. Turn key back to release steering lock. Manually turn wheels by hand again. If it requires the same ammount of strength to turn wheels, then Rack and Pinion is bypassing internally. Solution... replace rack & pinion.