Scheduled Maintenance Chart19Operation IntervalDaily First 8 Hrs. Every 50 Hrs. Every 100Hrs.Every 200Hrs.Every 300Hrs.Every 400Hrs.Every 500Hrs.Check & add engine oil Check for loose or lost fasteners Check for oil leakage Inspect fuel hose and connections Clean engine dust filter Inspect pad holder Change engine oil Change engine oil filter Check & clean air cleaner paper element Check & clean air cleaner foam element Inspect battery and battery connections Replace air cleaner paper element Replace air cleaner foam element Inspect, clean, & re-gap spark plugs, Replace ifnecessary Check & adjust valve clearance.* Retorqueheads.* Clean & lap valve seating surface.* Check engine emissions* Clean cooling fins Inspect drive belt Inspect burnishing head assembly Replace drive belt As Required* Contant NFE customer service.