Found a manual: See Attached:
1. The bearings, in both end shields of the motor, have
been lubricated at the factory with correct lubricant.
No other part of the motor requires lubrication.
2. Re-lubricate motor bearings in accordance with the
instructions on the nameplate. Be sure to wipe off dirt
or grit if present around oil hole caps to prevent any
possibility of foreign material contaminating the oil
wicks that supply the bearings with oil. Use a good
grade of medium weight mineral oil, such as automobile
engine oil, SAE 20.