So the saw is making a weird vibration/humming noise, but when I take off the belts and run just the motor it’s amazingly smooth and quiet… even the starting surge is barely perceptible.
I also noticed that one of the bearings on the arbor is running warm. So I yanked the arbor again and attempted to loosen up the bearing. But since the bearing is press fit, both into the arbor bracket casting and onto the arbor shaft, this isn’t as easy as simply loosening a nut.
After loosening the retaining nut, I gave the arbor a couple taps with a mallet, in an effort to relieve some pressure on the bearing. It seemed to spin just a tad more freely, but who knows…. may have done nothing at all.
Upon reassembly, I realize that the noise is actually more likely coming from the link belts….. (which are supposed to reduce vibration, not cause it). I had been uncertain about which way to mount the green link belts, as they don’t have an arrow on them, like the red ones are reported to have…. but I had found this graphic on the web… and decided to follow it.
But now I realize that this makes the drive pulley tend to push the tabs over backwards…. and though it looks like it would produce a better grip this way, I started wondering if it will run more quietly the other way. And come to think of it, when I put this same HF link belt on my jointer years ago, I now recall that I put it on one way, and then the other, and simply went with the way that was more quite. So I check the jointer…. and yup, it’s the other way.
So I reversed the belts and put it all back together.
Now to get my arbor bracket off, I have to push the roll pin that secures the worm gear on the crank shaft, so I can pivot the bracket further to the rear and clear the ways. When re-installing the roll pin, the little monster went in 3/4 of the way, b4 I realize that the hole is not drilled plum, that I’m going in the out, and the exit hole in the worm gear doesn’t line up…. AND…. that roll pin is not coming back out with vise grips :^(
Dremmel to the rescue…. I cut the last 1/8” of the pin flush and called it good, figuring that it was bound up in there so tight that the worm gear would never slip.
Bad news…. taking this apart again is going to be a major PITA
Good news…. between reversing the belts and playing with the arbor bearing, the vibration is gone.
-- Pine is fine, but Oak's no joke!