Farmall A steering

I'm planning on rebuilding the steering on my A. I can turn the steering wheel about a quarter turn before anything starts to happen with the remainder of the steering. What parts should I expect to get for the job. I already have the seals and gasket.

You start at the tierods they can be tightened if they are egg-shaped a disc grinder can make them with a calipers round again. Next is the arm coming off the steering sector is it loose on the out-put shaft. Thed internally the key holding the gear to the shaft then a bearing at the upper end. Then bushings some seals and you will be good as new again. Fill with 90wt so the worm and gear can run in lube. Ive done several with like new results when finished.

Charlie, there's been a lot of talk about these over the years. There was a gentleman here named Hugh MacKay (who since has passed away) who was very familiar with SA steering problems. I was able to find some of theses discussions by typing in 'Hugh MacKay- steering' in the search feature.

Heres two links to those articles...

http://www.ytmag.com/cgi-bin/viewit.cgi?bd=farmall&th=705718

http://www.ytmag.com/cgi-bin/viewit.cgi?bd=farmall&th=701442

...and here's two posts he's written about SA steering...

"Bob: If Steering shaft has not end to end movement the worm and bearings are fine. Castle nut can create the problem, but by the time that happens the woodruff key in the steering control arm is probably out of shape.
90% of these I've dealt with had nothing more wrong the the two woodruff keys on that vertical shaft, the one I mentioned in steering control arm and the one oin the half gear turned by the worm. Those keys alone can give 1.5 free turns on the steering wheel, if badly worn."

and...

"If the steering shaft has no end to end movement, I wouldn't touch that big plug. All you will correct by removing that is bearings on the shaft and if it has no movement the bearings are good.
If the bearings on the steering shaft are tight then your problem is woodruff keys on the vertical shaft that comes out bottom of steering box. The steering control arm is keyed to shaft and the gear inside is keyed to the same shaft. I have seen those two keys loose enough to give 1-1/2 turns of free travel on steering wheel. Only way to fix that is remover front axle, then bottom half of steering box. Usually the keyways require cutting larger and use larger keys."

Now, I'm not saying that this is your problem, but just some food for thought. I have an SA with the exact same problem, and I hope to tackle it this summer.
Try searching for some articles, and good luck.