Originally Posted by
David Kumm
Both bearings were originally oil bath. It looks like the motor bearing has been converted to grease. Mobil DTE Heavy/ Medium is the recommendation. If you can keep the open oil bath bearing system, go for it. A swap to sealed is a downgrade. Remove the cup and pipe and drain the oil from the bearing and replace. The grease bearing probably has been overfilled and a gob is sitting inside the motor. If you aren't going to take apart and look, run the machine and listen with a screwdriver on the bearing housing and feel for heat. Too much oil or grease will heat bearings. The original oil cup was glass and is set to a correct height so filling the cup halfway up the glass also fills the bearing cavity to the correct level- usually about 1/3 of the bearing. Good luck, Dave