I have a 1966 John Deere 4020, and I’m experiencing an issue with the steering. It turns fine to the left, but turning right is very difficult. You have to keep the wheel turned to the right for it to move at all. Even when the wheels are off the ground, it’s still tough to steer. I know the tractor has two pumps for the steering system. Where I can find a microfiche for rebuilding the pumps?
It sounds like you’re dealing with an issue where the steering only works in one direction, and based on the information provided, the hydraulic pump is not likely the cause. The most probable culprit is the steering valve, which controls the flow of hydraulic fluid for the steering. The steering valve has internal components that could be malfunctioning, possibly due to wear or blockages in the valve, which can affect the movement in one direction.
In this case, it’s suggested that the steering valve should be removed, cleaned, resealed, and re-calibrated. This is a job that requires special knowledge and tools, so if you’re not experienced with steering valve repairs, it might be best to have a professional handle it. The valve operates by controlling the flow of fluid to the steering motor, and if it’s faulty, it can prevent proper steering in one direction. If the steering works after you turn in one direction, then the issue may lie with the steering motor and could be due to worn-out seals.
A John Deere service manual and special tools will be necessary to repair or replace the steering valve. If you’re not comfortable with this level of repair, it’s recommended to seek professional help.
Wow, okay, I had a feeling that was the issue, but I wanted to get some advice first. This tractor is all original, except for the tires and oil—it’s got maybe 3,000 hours on it. My grandfather bought it new in 1966, and it’s been barn-kept, never left our farm. Do you know if there’s an online manual available? Honestly, I’m not too fond of our local dealer anymore. I rebuild pumps at work, but it sounds like special tools are needed for this job, so I’m stuck there. I really appreciate the info you’ve shared—thank you so much!
It’s great to hear that the tractor has been well taken care of! Given that it’s all original and in good condition, that’s definitely a plus. As for an online manual, there are a few resources where you can find John Deere manuals, like the official John Deere website, or from our site on category “Specifications & User Manuals . You should be able to find one for the 4020 there.
I totally understand about not wanting to rely on your local dealer if you’re already familiar with working on equipment. And since you rebuild pumps, you’ve definitely got some technical skill! For the special tools, I’d recommend looking for an aftermarket set online, as there are some good options for John Deere tractors that might save you some time and money. Keep up the good work, and good luck with the pump rebuild!
