I've been lurking here for a while, and finally purchased an 800/900 hybrid over the weekend with a leaking left axle seal. (The tractor is supposed to be a 1964 900, but has metal, curved fenders with a tool box, and an incorrect Wisconsin TRA 10D engine manufactured in 1966).
I replaced the axle seal, but in the process, damaged the other, larger, seal.
I replaced the large seal, and re-installed the axle and wheel, drained the remaining fluid and refilled it. For a reason I can't figure out, the tractor will not move. The gear shift lever seems to go into each gear, but the tractor will not move in any gear.
What did I install incorrectly?