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Day 2. Found all was not too bad inside. No black goop, no shavings or leftover pieces, etc. The grease was translucent white or yellow, depending on which bearing.... No difficulties getting the bearings out, hammer and a peice of dowel worked fine.
A small jewellers screwdriver to removed the dust seals on the bearings with no damage. A simple task. All main bearings in excellent shape
All bearings now cleaned and degreased preparatory to regreasing with PTFE-laced grease from Supercheap.
Did find a couple of not-very-tight screws but nothing dramatic.
Only significant problem so far was the excess preload on the dec worm gear, making the little bearings appear bad. Once preload removed, the bearings came good....I have new ceramic ones, only $38 a set on ebay, so will change those out anyway.
Main problem was removing the worm shafts from the housings. It turns out that the bearing at the end with the motor drive gear on is simply held in place by the black external cap, the other end has the spanner nut inside as well as an external cap. What this means is if you try to undo the "gear end" it is very tight, because of the pressure from the spanner nut. Undo the spanner nut end first, then the other end is quite easy.
I've done the Dec motor stepper gear backlash setup, used 1-2 thicknesses of alfoil for the spacer, and ready to do the shim in the dec worm gear tomorrow, digital caliper measurements say 1.2mm of shims.
Enough for today.
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