Sears Model 919-165600 Has Bad Vibration
I recently bought a compressor at an estate sale and when I inspected it (after I got it home) I found both connecting rods broke. I replaced them as well as the fan.
While working on the unit I noted both compressor side mounting tabs to be broken. Again no problem.
Once the unit was all back together it started fine and built pressure. The problem is the vibration. It's bad and I suspect it has been all along which lead to the broken connecting rods and mounting tabs.
It is an oil-less unit and behind the connecting rods there is a counter balance as well as one on the fan.
I read through all of the previous issued listed on you site, but couldn't find one that addressed this issue.
One item of note is the fan is off-center a bit. Not sure it is a mold or design issue.
Is there a procedure or technique to better balance the rotating assembly?