The oil level in the gear box should be checked regularly to make sure that the oil is filled in the gear box upto the indicated oil level. The first oil change is recommended after 500 working hours. Subsequently, the oil change interval should be about 10000 working hours. In case the gear box is being painted, please make sure that the oil seals are protected from the paint film. Periodically, check that all the clamping bolts, foundation bolts and plugs for proper tightness. No other maintenance is required for these gear boxes.