________________________________________________________________________________________

Home / Farm Tractors / John Deere Tractors / JD 6620 Premium

John Deere 6620 Maintenance

The John Deere 6620 Premium is a 6020 series 4x4 utility tractor. This model was manufactured from 2001 to 2006. The John Deere 6620 tractor is powered by 414.4 cubic inches John Deere 6068T 4V-CR 4-stroke 6-cylinder turbocharged diesel engine with a maximum power of 130 Hp (96.9 kilowatt) and 535 Nm (396 lb-ft) of peak torque at 1700 rpm.

The John Deere 6620 Premium is equipped with 3 types of transmission. Type 1: 24x24 PowrQuad Plus partial powershift transmission. Type 2: 24x24 AutoQuad transmission.

Type 3: AutoPowr variable transmission (IVT) with infinite forward and reverse gears. Maximum travel speed (forward and reverse): 25 mph (40 km/h). The closed center hydraulic system with load-sensing control has an axial-piston or gear-driven pump with a rated capacity of 25.4 gpm (96.1 lpm). The main relief pressure is 300 bar (2900 psi). The John Deere 6620 Premium is fitted with 420/70R28 front tires and 18.4R38 rear tires. The wheel base is 104.3" (2640 mm). The tractor is compatible with a John Deere 661 loader with a maximum lift height of 166 (4220), or John Deere 731 loader with a lift capacity at full height of 4255 lb (1930 kg).

Refill Capacities
Engine oil capacity, gal (L) 5.2 (19.5)
Engine coolant capacity, gal (L) 6.3 (24.0)
Hydraulic system capacity (AutoQuad transmission), gal (L) 13.7 (52.0)
Hydraulic system capacity (AutoPowr transmission), gal (L) 15.9 (60.0)
Hydraulic system capacity (PowrQuad transmission), gal (L) 13.7 (52.0)
Front axle oil capacity, gal (L) 1.7 (6.6)
Front PTO oil capacity, gal (L) 0.9 (3.5)

Recommended Oil and Fluid
Engine oil type Plus-50, Torq-Gard Supreme, SAE 10W-40, 15W-40, 5W-30. API Service category CG-4, CF-4
Engine coolant type Cool-Gard Premix Coolant
Hydraulic/Transmission fluid type Hy-Gard, Low Viscosity Hy-Gard, JDM J20C, J20D
Front axle oil type Hy-Gard, JDM J20C

Service Intervals
Check hydraulic/transmission fluid level Every 250 hours
Check front axle oil level Every 250 hours
Clean battery and check electrolyte level Every 250 hours
Lubricate axle hub bearings Every 250 hours
Change engine oil Every 250 hours
Replace engine oil filter Every 250 hours
Clean cab air filters Every 250 hours
Replace hydraulic/transmission oil filter (AutoPowr) Every 500 hours
Change engine fuel filter Every 500 hours
Replace activated carbon filter Every 500 hours
Lubricate rear axle bearings Every 500 hours
Replace hydraulic/transmission oil filter Every 750 hours
Replace hydraulic pump filter Every 750 hours
Replace front PTO oil filter Every 750 hours
Check and adjust engine idling Every 750 hours
Change hydraulic/transmission fluid (AutoPowr) Every 1000 hours
Change hydraulic/transmission fluid Every 1500 hours
Change front axle oil Every 1500 hours
Replace primary engine air filter Every 1500 hours
Replace secondary engine air filter Every 1500 hours
Replace cab air filters Every 1500 hours
Change front PTO oil Every 1500 hours
Check and adjust valve clearance Every 2000 hours
Flush cooling system and add new coolant Every 3000 hours

Replacement Parts
Engine oil filter part number RE504836
Engine fuel filter part number RE153517, RE62419
Primary engine air filter part number AL172781
Secondary engine air filter part number AL150288
Cab recirculation air filter part number L152026, L155288
Cab activated carbon filter part number AL158986
Cab fresh air filter part number AL177185, AL177184
Hydraulic/transmission oil filter part number AL156625/AL118036/AL203060, AL118321/AL203061 (AutoPowr)
Front PTO oil filter part number L114404

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

Farm Tractors Technical Specifications
JD 1026R JD 3650 JD 6400 JD 7810
KUBOTA B7500 KUBOTA L245 KUBOTA L2250 KUBOTA M4072
FORD 1320 FORD 2810 FORD 3930 FORD 5600
MF 250 MF 690 MF 3060 MF 6180
NH TC48DA NH M100 NH T7550 NH 8560
CASE IH 495 CASE IH 1255XL CASE IH 2140 CASE IH 2294