Hi Lynn,
Thanks for your helpful comments. We turned the shaft down a little, as it was slightly pitted, so the standard-size roller bearing will probably no longer fit. We won't use an EP oil in the gearbox, if that is not compatible with the bronze bush. I understand that the bush will only be under load in low gear and reverse. I am pretty sure we took the inner seals out of the bearings, but will check that again before we bolt the top cover on. Is the oil-slinger on the output shaft really necessary if we use sealed bearings? If so, we will have to find one from somewhere (maybe someone here has a spare one?). I should mention that we are a team of three, and the other two have a lot more expertise in gearboxes than I do.
Andrew
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