HP 65/67/97/41 card reader - lubrication of worm drive?

[jay]

(11-07-2016 01:09 AM)aj04062 Wrote:  

(11-06-2016 07:48 PM)jay Wrote:  The one I'm working on now squeals when the motor is running - perhaps some grease on the gears will quiet it down?

Th squealing comes from the bearings in the motor becoming dried out. If you were to take the motor out, with no load, and let it spin, you would probably hear the squeal at certain RPMS.

I have revived some by placing the motor vertically in a vise and letting oil seep in from the drive side.

Thanks, I'll take out the motor and see if it still squeals - I just read that the squealing could also be the screw gear against the bearing.

Back to my original question - should I leave the gears dry, or should I put some grease on them?