JD 1010 power steering issue

[YooperFarmall]

I have a friend with a JD 1010 that is having power steering
issues. When he is going down the road there seems to be
power steering lag. He says he has to turn the wheel slightly
in one direction and then quickly correct back to center. He
said if he turns the wheel slightly on one direction and keeps it
there, the wheel response will lag for a second and then
quickly turn too far. It is dangerous to drive at road speeds.
Is this an adjustment? If not, any suggestions on what
component he should change out? Its a beautifully restored
tractor which was originally manual steering. He bought a
donor tractor for the power steering parts.

 

[Jim.ME]

Just some background clarifications.

Was the donor a 1010? (I expect it was, but stranger things have happened.)

Is he certain the steering working properly on the donor? Or was it non-running so assumed to be ok?

Did he rebuild the steering system components when he did the swap or just move the parts over?

Does he have the John Deere service manual, SM 2033, for it?

 

[YooperFarmall]

Jim.ME, thank you for your response.
Yes, the donor tractor was also a 1010, it was a non-running
tractor so the power steering was not tested.
He did rebuild the components before reinstalling them.
He does not have the SM2033 service manual but on your
suggestion, he is now ordering one.

 

[Jim.ME]

(quoted from post at 08:50:24 04/01/21) Jim.ME, thank you for your response.
Yes, the donor tractor was also a 1010, it was a non-running
tractor so the power steering was not tested.
He did rebuild the components before reinstalling them.
He does not have the SM2033 service manual but on your
suggestion, he is now ordering one.
<img src=https://www.yesterdaystractors.com/cvphotos/cvphoto83645.jpg>

Looks good.

My first thought is without the manual, he replaced parts in the components and it was not adjusted correctly during assembly (since he didn't have a manual to guide him). That may be the problem and needs to be eliminated as a cause. Doing the proper adjustments needs to be the starting point.

He should also check and set toe in if he didn't do that.

 

[YooperFarmall]

Im wondering if a loose worm gear would result in the same
steering performance. The worm gear appears to be in good
shape, Im wondering about any possible adjustments

 

[Jim.ME]

The service manual should have the adjustment info for that as well.

 

[CPeter]

I don't have a 1010 but have had and have a bunch of 40 and 420 machines. Until I got a timing light and did it the right way, I had nothing but trouble. Beg, borrow, or steal one and do it exactly like the book says. Also with a timing light you can check for bad bushings in the distributor ( the timing floats around) and that the advance is working correctly. Also, if something is breaking down and the spark is cutting out. Timing by ear never seems to get it right. I spent one spring working on an antique fire truck with a Ford V8 engine. Did exactly as you describe. Turned out to be a bad distributor rotor. At idle the ignition voltage was low enough that it was OK. As the engine speed increased and the generator started charging, the primary and secondary voltage increased and it started to ground out though a carbon trace in the rotor. First time in 65 years of working on engines that I have seen it.
Peter