Aluminum Right Angle Worm Gear Reducer, 40 mm C.D., 25/1, 56C Input Flange, Hollow Bore Output
Brand new, World Wide Electric aluminum worm gear reducer. Aluminum alloy housings. Gearbox flanges are designed to accept NEMA C-Face electric motors.
Pre-filled with synthetic oil. Two bearings on the input and output shafts, double lip oil seals, epoxy paint inside and outside for rust prevention,
and hollow output bores to accept plug-in output shafts (sold separately).
A: You should be able to, yes. There are breather ports on the topmost face and the bottom face when seen as pictured. The manufacturer has details on the lubricant level in various positions in the document found at this link.