I've got a B7001/B7100 non-HST tractor. It's a late serial number unit for parts where there's a s/n split, but I don't think that's relevant here.
The service manual says this about removing the transmission from the diff housing:
I believe this is part 66611-14830. The needle bearing (89) is still in the diff housing. Part #88 looks like this:
Smooth on one side, pair of notches on the other side. Mine (this photo is from eBay) does not have that dark wear ring, but it may be a clue.
So, the question is:
Which way does this spacer fit onto the reverse shaft? Notches face toward the rear/needle bearing/diff housing, or they face toward the front/spur gear?
I'm leaning toward "notches face the needle bearing" orientation because:
The service manual says this about removing the transmission from the diff housing:
- Remove bolts...
- Tap with mallet...
- "When the transmission case is separated, the collar at the end of the reverse shaft will fall. Do not lose it."
I believe this is part 66611-14830. The needle bearing (89) is still in the diff housing. Part #88 looks like this:
Smooth on one side, pair of notches on the other side. Mine (this photo is from eBay) does not have that dark wear ring, but it may be a clue.
So, the question is:
Which way does this spacer fit onto the reverse shaft? Notches face toward the rear/needle bearing/diff housing, or they face toward the front/spur gear?
I'm leaning toward "notches face the needle bearing" orientation because:
- I think the needle bearing probably created the wear pattern in this photo
- The grooves might exist to facilitate oil flow to the bearing
- My hardcopy parts diagram has a *slightly* clearer version of the drawing and there's no indication of the grooves in that picture.
