Got a Wacker RT82 in and need to do an oil change on gear case and exciters along with other maintenance. According to the manual 2 of the drums are removed to replace the gear case oil (with new 10W-30) and 2 of the drums are removed to replace the exciter oil. Anything in particular regarding exciter oil change as the manual is saying you need special tools...doesn't look too special to me but thought I would ask. Also does the exciter take 10W-30 as well? Thanks!