Maintenance Kit for John Deere 50G Mini Excavator Fuel Air Oil Hydraulic Filter March 20, 2026 adminmaintenance No Comments Maintenance Kit for John Deere 50G Excavator Fuel Air Oil Hydraulic Filter. SEE BELOW FOR DETAILS. Primary Fuel Filter Water Separator. Hydraulic Tank Oil Filter Element. Pilot System Oil Filter Element. JOHN DEERE 50G EXCAVATOR.