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John Deere 6420 Specs

JD 6420 Engine Specifications

Engine Model - 4045HL271 / 4045HL473
Engine power at rated engine speed - 81 kW (110 hp)
Max. torque at 1500 rpm - 470 Nm (346 lb-ft)
Number of cylinders - 4
Bore - 106.5 mm (4.19 in.)
Stroke - 127.0 mm (5.00 in.)
Displacement - 4530 cm3 (276 in3)
Firing order - 1-3-4-2
Fuel injection pump - Denso HPCR
Intake valve clearance - 0.35 mm (0.014 in.)
Exhaust valve clearance - 0.45 mm (0.018 in.)
Slow idle - 845 to 855 rpm
Fast idle - 2455 to 2465 rpm
Rated engine speed - 2300 rpm
Working speed range - 1500 to 2300 rpm
Engine speed 540 rpm rear PTO - 2143 rpm
Engine speed 1000 rpm front PTO with 6 splines - 2185 rpm
Max. PTO power at rated PTO speed - 72 kW (98 hp)

John Deere 6420 Transmission

SyncroPlus transmission - synchronized gears, mechanically actuated
Gear selections - 12 forward gears, 4 reverse gears
Power Reverser transmission - synchronized gears, mechanically actuated
Gear selections - 16 forward gears, 16 reverse gears
Actuation of reverse drive lever - mechanical/hydraulic, under load, without operating the clutch
PowrQuad transmission - planetary gears, hydraulically actuated
Gear selections - 16 or 24 forward gears, 12, 16 or 24 reverse gears
Actuation of reverse drive lever - mechanical/hydraulic, under load, without operating the clutch
PowrQuad Plus transmission - planetary gears, hydraulically actuated
Gear selections - 24 forward gears, 12, 16 or 24 reverse gears
Actuation of reverse drive lever - mechanical/hydraulic or electrical/hydraulic, under load, no operating clutch
Clutch - electric/hydraulic
AutoPowr transmission - infinitely variable mechanical/hydraulic transmission
Speed ranges - 0.05 - 40 km/h (0.03 - 25 mph) or 0.05 - 50 km/h (0.03 - 31 mph)
Change of direction of travel - electrical, under load, without operating clutch

JD 6420 Hydraulic System

Type of Hydraulic System - Load-Sensing system with fixed-displacement pump
Pump type - gear-type pump
System pressure min. (stand-by) / max - 1500 kPa (15 bar; 220 psi) / 20000 kPa (200 bar; 2900 psi)
Steering system - hydrostatic

JD 6420 Tires Index radius

13.6-28 - 610 mm (24.0 in.)
14.9-28 - 640 mm (25.2 in.)
13.6-38 - 772 mm (30.4 in.)
540/65-24 - 620 mm (24.4 in.)
280/85-28 - 560 mm (22.0 in.)
320/85-28 - 590 mm (23.2 in.)
340/85-28 - 610 mm (24.0 in.)
380/70-28 - 610 mm (24.0 in.)
380/85-28 - 640 mm (25.2 in.)
420/70-28 - 640 mm (25.2 in.)
480/65-28 - 640 mm (25.2 in.)
520/60-28 - 640 mm (25.2 in.)

John Deere 6420 Capacities

Fuel tank - 165 L (43.6 U.S.gal.) or 185 L (48.9 U.S.gal.)
Cooling system (engines without intercooler, tractors without cab) - 11.0 L (2.9 U.S.gal)
Cooling system (engines without intercooler, tractors with cab) - 13.5 L (3.6 U.S.gal.)
Cooling system engine type designation includes the letter "H") - 24.0 L (6.3 U.S.gal)
Crankcase with filter - 16 L (4.2 U.S.gal.)
SyncroPlus transmission with 12/4 gears - 52 L (13.7 U.S.gal.)
Power Reverser with 16/16 gears - 52 L (13.7 U.S.gal.)
PowrQuad transmission with 16/16 or 16/12 gears - 49 L (12.9 U.S.gal.)
PowrQuad transmission with 24/24 or 24/16 gears - 50 L (13.2 U.S.gal.)
PowrQuad Plus transmission with 24/24 or 24/16 gears - 50 L (13.2 U.S.gal.)
AutoQuad Plus transmission with 24/24 or 24/16 gears - 50 L (13.2 U.S.gal.)
AutoPowr transmission - 60 L (15.9 U.S.gal.)
AutoPowr extra with creeper transmission - 1 L (0.3 U.S.gal.)
AutoPowr extra with front-wheel drive - 3 L (0.8 U.S.gal.)
AutoPowr extra with TLS axle - 3 L (0.8 U.S.gal.)
Front PTO - 3.5 L (0.9 U.S.gal.)
Front-wheel drive Axle housing - 6.5 L (1.7 U.S.gal.)
Front-wheel drive Final drives (without brake) - 0.6 L (0.2 U.S.gal.)
Front-wheel drive Final drives (with brake) - 0.9 L (0.3 U.S.gal.)

John Deere 6420 Loads and Weights

Max. permissible static vertical load

- on drawbar (transport pos., 250 mm; 9.8 in.) - 1600 kg (3525 lb.)
- on trailer hitch - 2000 kg (4410 lb.)
- on hook of pick-up hitch - 3000 kg (6615 lb.)
- on piton-fix - 3000 kg (6615 lb.)
- on ball-type tow hitch (transport) - 3000 kg (6615 lb.)
- on ball-type tow hitch (in field) - 4000 kg (8815 lb.)

Maximum permissible front axle load (without front-wheel drive)

- normal operation - 2050 kg (4520 lb.)
- front loader operation - 5000 kg (11025 lb.)

Maximum permissible front axle load (with front-wheel drive)

- normal operation (axle without brake) - 3800 kg (8375 lb.)
- normal operation (axle with brake) - 4200 kg (9260 lb.)
- front loader operation - 5800 kg (12790 lb.)

Maximum permissible rear axle load - 6500 kg (14325 lb.)
Maximum permissible total weight - 8200 kg (18075 lb.)