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Home / Farm Tractors / John Deere Tractors / JD 4020

John Deere 4020 Maintenance

The John Deere 4020 is a 4x2 New Generation series row-crop tractor. This model was manufactured from 1963 to 1972. The components of JD 4020 driveline system: The John Deere 6-cylinder gasoline or diesel engine, and 8x4 Syncro Range partially synchronized transmission or 8-speed full power shift transmission. Max. forward speed - 20.5 mph (33 kph), max. reverse speed - 5.2 mph (8.4 kph).

The closed center hydraulic system includes a piston pump with fluid flow rate of 18 gpm (68.1 lpm). The main relief pressure is 2250 psi (155 bar). The rear lift capacity is 3790 lbs (1720 kg).

The John Deere 4020 tractor fitted with standard 7.5x18 front tires and 18.4x34 rear tires, or row-crop 6.00x16 front tires and 15.5x38 rear tires. The wheelbase is 100.3" (2540 mm) for standard models and 97.5" (2470 mm) for row-crop models. The John Deere 4020 is compatible with JD 148 front end loader with a maximum lift height of 126" (3200 mm), and JD 158 front end loader with a maximum lift height of 156" (3960 mm).

Refill Capacities
Engine oil capacity, gal (L) 2.0 (7.6) gasoline or 3.0 (11.4) diesel
Engine coolant capacity, gal (L) 6.05 (23.0)
Hydraulic system capacity (Syncro-range transmission), gal (L) 10.0 (37.9)
Hydraulic system capacity (Power-shift transmission), gal (L) 14.0 (53.1)
Belt pulley oil capacity, qts (L) 1.3 (1.2)
Final drive housing capacity (Hi-crop), qts (L) 1.75 (1.65)

Recommended Oil and Fluid
Engine oil type Torq-Gard, SAE 30, SAE 10W-30. API Service category CC, CD
Engine coolant type Cool-Gard Premix Coolant
Hydraulic/Transmission fluid type JD 303 Special-Purpose Oil
Belt pulley oil type JD 303 Special-Purpose Oil

Service Intervals
Check hydraulic/transmission fluid level Every 50 hours
Lubricate axle hub bearings Every 50 hours
Change engine oil Every 100 hours
Replace engine oil filter Every 200 hours
Inspect and adjust fan belt Every 200 hours
Check belt pulley oil level Every 200 hours
Clean air cleaner Every 200 hours
Clean battery and check electrolyte level Every 200 hours
Change engine fuel filter (diesel) Every 600 hours
Clean carburetor strainer screen (gasoline) Every 600 hours
Check injection timing (diesel) Every 600 hours
Clean or replace spark plug (gasoline) Every 600 hours
Replace hydraulic oil filter Every 600 hours
Change belt pulley oil 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
Clean and adjust wheel bearings Every 1200 hours
Clean hydraulic pump valve filter Every 1200 hours
Change final drive housing oil (Hi-crop) Every 1200 hours
Flush cooling system and add new coolant Every 1500 hours

Replacement Parts
Engine oil filter part number AR26350
Engine fuel filter part number AR44077, AR45098 (diesel), AR50141 (gasoline)
Engine air cleaner part number AT33363 (diesel), AR39798 (gasoline)
Hydraulic/transmission oil filter part number AR75603
Hydraulic filter element part number R27173

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