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John Deere 4840 Maintenance

The John Deere 4840 is a two-wheel drive row-crop tractor from Iron Horses series. This model was manufactured between 1978 and 1982. The JD 4840 driveline components: John Deere 6466 four-stroke six-cylinder direct injection turbocharged intercooled diesel engine and 8x4 full powershift transmission.

A 466 cubic inches (7.6 L) engine has a cylinder bore of 4.56" (116 mm), piston stroke of 4.75" (121 mm), and rated power of 200 hp (148.1 kW). The maximum travel speed (forward and reverse): 18.6 mph (29.9 km/h) / 6.4 mph (10.3 km/h).

The closed center hydraulic system used a pump with a flow of 23 gpm (87.1 lpm) gpm. The hydraulic pressure is 157 bar (2275 psi). The John Deere 4840 was equipped with a power steering system, differential hydraulic wet disc brakes, 11.00x16 or 16.5Lx16.1 front tires, and 18.4x38 or 18.4x42 rear tires. The wheelbase is 118.5 inches (3000 mm).

Refill Capacities
Engine oil capacity, gal (L) 5.3 (20.0)
Engine coolant capacity, gal (L) 10.0 (38.0)
Hydraulic/transmission system capacity, gal (L) 16.5 (62.5)
Fuel tank capacity, gal (L) 103.0 (390.0)

Recommended Oil and Fluid
Engine oil type Torq-Gard Supreme, SAE 15W-30, 15W-40, 5W-20. API Service category CD, SC
Engine coolant type Cool-Gard Premix Coolant
Hydraulic/Transmission fluid type Hy-Gard, Low Viscosity Hy-Gard, JDM J20A, Quatrol

Service Intervals
Check hydraulic/transmission fluid level Every 100 hours
Lubricate axle hub bearings Every 100 hours
Change engine oil Every 100 hours
Replace engine oil filter Every 200 hours
Inspect and adjust alternator belt Every 200 hours
Clean cab air filters Every 200 hours
Replace engine coolant filter Every 200 hours
Clean battery and check electrolyte level Every 200 hours
Change engine fuel filter Every 600 hours
Check and service engine air filters Every 600 hours
Check injection timing Every 600 hours
Replace hydraulic/transmission oil filter Every 600 hours
Check and adjust engine idling Every 600 hours
Check and adjust valve clearance Every 600 hours
Change hydraulic/transmission fluid Every 1200 hours
Replace primary engine air filter Every 1200 hours
Replace secondary engine air filter Every 1200 hours
Replace cab air filters Every 1200 hours
Clean and adjust wheel bearings Every 1200 hours
Clean hydraulic pump valve filter Every 1200 hours
Flush cooling system and add new coolant Every 2000 hours

Replacement Parts
Engine oil filter part number AR43634, DZ101880
Engine fuel filter part number AR50041
Primary engine air filter part number AR80652
Secondary engine air filter part number AR80653
Cab recirculation air filter part number RE12793, RE67830
Cab fresh air filter part number R65450
Hydraulic/transmission oil filter part number AR94510
Hydraulic filter element part number R27173
Engine coolant filter part number RE11992




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