Front wheel wobble in 4th gear

I have a 52 CA narrow front.  I recently put new front tires and wheel weights on the front.  Now, when I take it up the blacktop in 4th the front tires occasionally get into a annoying oscillation back and forth.  It just bounces back and forth basically showing the slack in the steering box.  I've checked the front end, and it feels tight.  All the slack appears to be in the box.  It is kind of like what we call death wobble in the 4x4 truck world.  Once is starts it will do it until you either stop or pull the steering wheel to one side.  I lowered the pressure from 35 to the mid 20's with no result.  I was considering running one tire high and one tire low kind of preload it so to speak so that it would put constant pressure to one side.  It wouldn't bother me because I don't run blacktop very often, but I am going to use the tractor for a hayride in a couple weeks, and there is a lot of blacktop on our route.

Have any of you ever had this issue?  If so did you find a fix (other than another box!)?

Also the steering box has an adjustment. The service manual explains the procedure.

Leon are you thinking that the weights have taken the tires out of balance causing the wobble? Just thinking aloud but I never thought much about that with wheel weights.

Check wheel bearings/adjustment.

This is common with these old tractors. Still have a WD45 in the shop that the tapered bolt on the lower end of the front end had come loose. Grandpas C did this back in 1960's. gear box gets worn often the adjustment will fix it, just be sure you don't get the adjustment too tight. I had to put 2 rib front tires on 1 back in the 1970's to stop it.

I will look into adjusting it. It appeared that most of the play was in the box when I wiggle checked it. If it's anything like a saginaw box on a Gm, the center wears and it can't be adjusted because it gets too tight away from center.

Thanks
Lynn

Guy had a C with a worn gear in gear box .Used 41/2 side grinder and ground down teeth on each end until you could adj and it would not bind right or left. Guy was happy. You do what you got to do.

I suspect that you have always had the slightly loose gearbox, but since the tires didn't have the extra weight on them before, they slipped ever so slightly that you really didn't notice the issue when you were on the blacktop.  Of course on gravel that is even more forgiving.  Now that you have more weight on the front end, it isn't going to give any more, and now you will see your play show up.  lessening the air pressure in the tires is only going to make it worse.  What do you do when you want tires to grip better??? you lower the air pressure, at least to a certain point.  You will either have to fix the issue, stay off the blacktop, inflate one fully, and run the other tire nearly flat, which isn't good either.