1969 350 dozer quill oring

[psheets]

I have a 1969 JD 350 dozer. I have the quill out to change the oil seal. My diagram shows 2 orings that go between the quill flange and the shims is this correct. It makes sense with the 1 oring because there is a slight indention at the flange. Just doesn’t make sense there are two and doesn’t make sense it would be before the shins. Any help would be greatly appreciated.

[LeonardL]

Yes this is correct. As I recall, the two o-rings are different sizes. As in one will be a smaller diameter thickness than the other. The smaller or thinner one goes on the quill first before the shims and then the second o-ring will fit in a groove machined into the quill which should be out a little ways away from the shim pack. It fits just inside the transmission case sealing it and then the other o-ring will fit directly against the outer side of the transmission case. This seals the transmission from the clutch housing as does the oil seal.

Like a lot of the other procedures I have done over the years, I have slept several times since the last time I was in this deep on a 350. The later model 350C, 350D and the 400G did away with these o-rings since they had wet clutches and they all used a common source for the lube fluids.

Just for information sake, if you ever do a complete overhaul on the transmission / differential on a 350, 350B you want to set those up dry with no seals or O-rings in place. Get everything set to specs and then install your seals and o-rings. That way you're not fighting them and taking a chance of damaging one of them in the process.

Hope this helps a bit and good luck!!

[psheets]

Thank you. The diagram in the book shows both before the shim pack that is where i was confused at.