For filling the oil, open the change gear box cover and fill with SAE 40 N grade oil. The oil level is indicated by oil sight glass provided. To drain the oil for cleaning purposes, open screw plug provided at bottom of the gear box. The spindle bearing bottom of the gear box. The spindle bearings are lubricated for life using special molybdenum sulphide grease (imported). The Gear Box is lubricated by a specially designed splash lubricated system with re-circulating integrated pump