2010 will not turn right

[2010C MN]

She a 1965 2010 dozer she will not turn right. I took the cover off the streering cluch housing. There about 4" of water and mud in the bottem of it. Think that could be the trouble to start with I have the steering and brake linkage out. The sprocke and pinion shaft out. I'm down to the drive shaft. How do I get that out. I do not have a shop book yet all I have is a. Parts catalog.