1st Service 500 hours or 3 months Air and Oil Filter, 4000 Oil 2nd Service 2000 hours or 12 months Air Filter, Oil Filter, Oil Separator, 4000 Oil 3rd Service 4000 hours or 24 months Air Filter, Oil Filter, Oil Separator, Inlet Valve, 4000 Oil + Dryer Filter Elements (optional) 4th Service 6000 hours or 36 months Air Filter, Oil Filter, Oil Separator, 4000 Oil 5th Service 8000 hours or 48 months Air Filter, Oil Filter, Oil Separator, Inlet Valve, Minimum Pressure Valve, 4000 Oil + Dryer Filter Elements (optional)