Rebuilding and Upgrading a Jet JMD-20VS Mill-Drill, Part 5:
Moving on to the second half of the drive assembly, we have this ugly lump. Filthy with dried grease,
thirty-year-old Cosmoline, belt-dust and just general gunk, and of course all five (!) of the bearings are bad.
Which means that all eleven bearings, between the motor (but not counting the motor itself)
and the spindle, were bad. No wonder this thing made noise.
Anyway, press out the old...
And press the shaft out of the stack.
Press the adjuster fork thingamadoojobber off the other end...
Pop the snap rings...
And press those bearings out too. So far none of the bearings I've removed were sealed- they were all
just shielded, and only on one side. Was that some kind of cost-cutting measure?
Two and a half cents per bearing to skip the shield?
Said fork thingie pushes on this bearing, which has a steel cap/plate- the fork pushes
this down or lets it up, so the belt can move about on the pulley.
After cleaning the parts (no photos, as I don't want to slobber dirty solvent all over my camera)
we stack up the drive spindle bearings with their spacers...
Like so...
And press it all back together again.
The upper half of the pulley gets its pusher bearings- sealed this time.
And then it all slides onto the spindle.
The pusher cap...
The forkamadoowhacky, freshly cleaned and with its new bearings...
Stacked up and ready to install!
Then it was a simple matter of just setting it in place, and bolting it down.
(Lightly snugged, as we'll have to adjust the belts shortly.)
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