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Thanks Pete and John for your comments. I'm leaning towards a "suck it and see" approach, meaning I'll take a look at the goop inside the main housing and if it's lousy or has metal bits in it, I'll probably replace at least the RA and Thrust bearings if it looks like I'd damage the seals during removal for cleaning.
If the internals of the casing look reasonable, I'll leave them be and concentrate on the worm section.
One small question, and I think you told me this already Pete, are the two taper roller thrust bearings easy to remove and it's the ball bearings that need the persuader, or vice versa? I would suspect the taper bearings should be easy to remove and clean/regrease, whereas the ball bearings would have the dirt seal on both sides and would be a tight fit on the shafts as well. Am I correct?
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