8n ford wheel wobble

my 8n ford right front wheel wobbles whenever I hit a bump while in 3 or 4th gear. If I rest my foot on the tie rod (?) the wobble will stop. I checked front wheel bearings by jacking up the front end and wiggling the wheel. It did not move so I think the bearings are okay. Does my tie rod need adjusting, if so how?

First thing to check is for loose or worn components.

Jack it up again and check the king pin bushings. Also check the pinch bolt on the steering arms on top of the king pins, make sure they are tight and not turning on the shaft. Then check the 4 tie rod ends for excess wear, check the steering gear sector shafts for wear, and see if the steering gear is relatively tight in the straight ahead position. Unless the front end has recently been rebuilt, there will probably be "some" wear and play in the system. It doesn't have to be prefect, but anything excessive needs to be replaced.

When all is checked out, set the toe in. This can be done with a tape measure. Measuring off the ribs, or a selected tread groove if it has automotive tires. Set the front of the tires about 1/4" closer together than the back. I like to do this with the tractor on the ground and having been driven forward before the measurement is taken. Also be sure the steering gear is positioned straight ahead. You can find this by turning the wheel lock to lock, count the turns, go back half way, mark the location. Make necessary adjustments by turning the adjuster sleeves on the tie rods.

Remember, you are setting the toe in, and the straight ahead position together. The necessity to get the steering gear set straight ahead is, there is a "tight" spot on the gears when it's straight, and also to get the turning capacity equal in both directions.