John Deere Loader 644P

Lubricate loader linkage and cylinder pivots

Lubricate coupler lock pins (if equipped)

Replace air cleaner dust unloader valve

Replace engine air cleaner elements

Replace fuel tank breather filter

Drain and refill park brake oil

Sign off on the 1000 Hourly Maintenance

Check windshield washer fluid level

Check and clean precleaner housing (if equipped)

Check and clean heating and air conditioning housing

Inspect tires and check pressure

Clean hydraulic pump case drain in-line screen

Check rear camera and radar object detection (ROD) system (if equipped)

Drain and refill transmission oil and replace filter

Drain and refill front and rear axle oil

Replace open crankcase vent (OCV) filter

Check and adjust engine valve lash

Rerun transmission clutch calibration (cab monitor)

Replace diesel exhaust fluid (DEF) tank breather filter

Replace diesel exhaust fluid (DEF) dosing unit filter

Replace hydraulic system return filter

Drain, flush, and refill hydraulic system oil

Clean hydraulic system fill strainer

Check driveline damper for cracks (Every 5000 Hours)

Drain and refill cooling system (Every 6000 Hours)

Replace diesel exhaust fluid (DEF) in-line filter(Every 6000 Hours)

Sign off on the 4000 Hourly Maintenance