John Deere Tractor 6420

Check seat belt and seat belt attachment for signs of wear

Drain and refill with fresh oil at least once a year (see "Service / Every 500 Hours")

Replace the filters with new ones at least once every year

Sign off on the yearly maintenance

Drain and refill (see Service - Every 500 Hours)

Replace filter element. Replace with a John Deere element (see Service - Every 500 Hours)

Check connections for leaks (see Service - Every 500 Hours)

Transmission/hydraulic oil filter

Replace filter elements (see Service - Every 750 Hours)

Engine crankcase drained and refilled?

Engine crankcase filter replaced with a John Deere element?

Air intake hoses checked for leaks?

Engine ground connection checked?

Components of drawbar checked for wear and replaced if necessary by John Deere dealer?

Engine valves - Have valve tappet clearances checked by your John Deere dealer every 2000 hours?

Tractor lubricated after washing with high-pressure water?

Battery electrolyte concentration

Transmission and hydraulic system