John Deere 7820 Specs ( 2004-2007 )
Overview
The John Deere 7820 is a row-crop farm tractor manufactured in Waterloo, Iowa, from 2004 to 2007, powered by an 8.1L 6-cylinder turbocharged diesel engine. This model features a standard cab and was offered with multiple transmission configurations, including PowrQuad Plus, AutoQuad Plus, and the infinitely variable AutoPowr IVT. Listed specifications indicate a maximum gross engine power of 199.8 hp and a tested PTO output of 174.31 hp.
Ideal Applications
Tested Power and Pulling Performance:
According to OCED Tractor Test 1834, the 4WD AutoQuad-Plus configuration achieved a maximum pull of 21,634 lbs and a maximum PTO power of 174.31 hp.
Hydraulic and Hitch Capacity:
The tractor is equipped with a closed-center pressure-flow compensated hydraulic system delivering 32.2 gpm pump flow and a Category 3/3N rear hitch with a lift capacity of 10,050 lbs.
Transmission and Drivetrain Configuration:
Mechanical options include 16-speed or 20-speed partial power shift transmissions and a hydro-mechanical IVT with infinite speeds available on four-wheel drive models.
Production
| Description | Row-Crop tractor / Built in Waterloo, Iowa, USA |
|---|---|
| Manufacturer | John Deere |
Engine
| Engine type | John Deere 8.1L 6-cyl diesel |
|---|---|
| Bore/Stroke | 4.56x5.06 inches (116 x 129 mm) |
| Compression | 16.5:1 |
| Coolant capacity | 33.8 qts (32.0 L) |
| Description | John Deere / turbocharged diesel / 6-cylinder / liquid-cooled inline |
| Displacement | 496 ci (8.1 L) |
| Firing order | 1-5-3-6-2-4 |
| Fuel system | high-pressure common rail |
| Idle RPM | 875-2200 |
| Maximum Power (gross) | 199.8 hp (149.0 kW) |
| Maximum Power (net) | 194.5 hp (145.0 kW) |
| Oil capacity | 25.4 qts (24.0 L) |
| Rated Power (gross) | 189.1 hp (141.0 kW) |
| Rated Power (net) | 182.4 hp (136.0 kW) |
| Rated RPM | 2100 |
| Starter volts | 12 |
| Torque | 666 lb-ft (903.1 Nm) |
| Torque RPM | 1400 |
| Drawbar (tested) | 143.52 hp (107.0 kW) |
| Engine (gross) | 189.1 hp (141.0 kW) |
| Engine (max) | 199.8 hp (149.0 kW) |
| Engine (net) | 182.4 hp (136.0 kW) |
| PTO (claimed) | 155 hp (115.6 kW) |
| PTO (tested) | 174.31 hp (130.0 kW) |
Transmission
| Clutch | hydraulic wet discs / hydraulic wet discs / hydraulic wet discs |
|---|---|
| Description | Four power-shift gears (1-4) in four synchronized ranges (A-D) with left-hand reverser. Power shuttle shifting between forward and reverse. / Four power-shift gears (1-4) in five synchronized ranges (A-E) with left-hand reverser. Power shuttle shifting between forward and reverse. / Four power-shift gears (1-4) in five synchronized ranges (A-E) with left-hand reverser. Power shuttle shifting between forward and reverse. AutoQuad mode offers automatic load-matched gear shifting with standard and economy-shift settings. |
| Drive type | Hydro-mechanical IVT controlled via right-hand speed lever and left-hand reverser lever. Knob on the speed lever adjusts the set speeds for two ranges. Minimum speed of 50 meters per hour (164 feet per hour). The IVT was available on the 7820 only when equipped with four-wheel drive. |
| Gears | 16 forward and reverse / 20 forward and reverse / 20 forward and reverse / infinite forward and reverse |
| Transmission | PowrQuad Plus / PowrQuad Plus / AutoQuad Plus / AutoPowr IVT |
| Type | partial power shift / infinitely variable transmission |
| Description | infinitely variable transmission |
| Transmission type | 16-speed partial power shift / 20-speed |
| Description | infinitely variable transmission |
| Transmission type | 16-speed partial power shift / 20-speed |
Mechanical
| Cab | Cab standard. |
|---|---|
| Description | Power steering / Hydraulic wet disc brakes |
| Drive type | Two- or four-wheel drive |
Capacity
| Front axle | 15.2 qts (14.4 L) |
|---|---|
| Front hubs | 2 qts (1.9 L) |
| Fuel | 103.5 gal (391.7 L) |
| HD Front hubs | 4 qts (3.8 L) |
| Hydraulic system | 28.5 gal (107.9 L) |
Hydraulics
| Capacity | 28.5 gal (107.9 L) |
|---|---|
| Pressure | 3046 psi (210.0 bar) |
| Pump flow | 32.2 gpm (121.9 lpm) |
| SCV flow | 30 gpm (113.6 lpm) |
| Type | closed-center pressure-flow compensated (PFC) |
| Valves | 7 |
Hitch
| Front Hitch | optional |
|---|---|
| Rear lift | 10050 lbs (4558 kg) |
| Rear Type | 3/3N |
PTO
| Clutch | hydraulic wet discs |
|---|---|
| Engine RPM | 540@1950 |
| Front PTO | independent OptOptional |
| Front PTO Type | 1000 (1.75) |
| Rear PTO | independent |
| Rear PTO Type | 540/1000 (1.375) |
Electrical
| Batteries | 2 |
|---|---|
| Battery CCA | 925 |
| Battery volts | 12 |
| Charging amps | 150 |
| Charging system | alternator |
| Ground | negative |
Dimensions & Tires
| 2WD Clearance (drawbar) | 16.7 inches (42 cm) |
|---|---|
| 2WD Clearance (front axle) | 25.6 inches (65 cm) |
| 4WD Clearance (drawbar) | 16.3 inches (41 cm) |
| 4WD Clearance (front axle) | 22.3 inches (56 cm) |
| Clearance (drawbar) | 16.3 inches (41 cm) |
| Clearance (front axle) | 22.3 inches (56 cm) |
| Height | 125.4 inches (318 cm) |
| Height (cab) | 125.4 inches (318 cm) |
| Length | 212.2 inches (538 cm) |
| Rear axle | 3.622 by 96 inches (91 by 2438 mm) / 3.622 by 110.5 inches (91 by 2806 mm) / 3.622 by 118 inches (91 by 2997 mm) / 3.937 by 96 inches (99 by 2438 mm) / 3.937 by 110.5 inches (99 by 2806 mm) / 3.937 by 118 inches (99 by 2997 mm) |
| Wheelbase | 112.6 inches (286 cm) |
| Width | 96 inches (short axle) (243 cm) |
| Front tire | 11.00-16 |
| Rear tire | 18.4R42 (2WD) |
| Weight | 16002 to 17603 pounds |
| Wheelbase | 112.6 inches (286 cm) |
| Ag front | 11.00-16 |
| Ag rear | 480/80R42 |
| Standard tires (ag) | Front: 11.00-16. Rear: 18.4R42 (2WD) |
7820 Serial Number Location
| Description | On tractor frame, front right-hand side. |
|---|
John Deere 7820 Weight
| 2WD Shipping | 16,002 lbs (7258 kg) |
|---|---|
| 4WD IVT Shipping | 17,603 lbs (7984 kg) |
| 4WD Shipping | 17,102 lbs (7757 kg) |
| Gear Shipping | 17309 lbs (7851 kg) |
| IVT Shipping | 17750 lbs (8051 kg) |
| Max capacity | 28886 lbs (13102 kg) |
| Max front axle | 12128 lbs (5501 kg) |
| Max rear axle | 22050 lbs (10001 kg) |
| Operating | 17,230 lbs (4WD AutoQuad) (7815 kg) |
OCED Tractor Test 1834
| Description | 496 diesel AutoQuad-Plus 4WDMarch 31 - April 21, 2004Link: OCED Tractor Test 1834 file / PTO performance / Drawbar performance |
|---|---|
| Fuel use | 9.6 gal/hour (36.3 l/hour) / 9.4 gal/hour (35.6 l/hour) / 9.6 gal/hour (36.3 l/hour) / 9.5 gal/hour (36.0 l/hour) |
| Max power | 174.31 hp (130.0 kW) / 143.52 hp (107.0 kW) |
| Max pull | 21,634 lbs (9813 kg) |
| Power at rated engine speed | 156.55 hp (116.7 kW) |
| Power at rated PTO speed | 170.96 hp (127.5 kW) |
References
| Description | 7020 Series published in 2003, by John Deere / 7020 Series published in 2004, by John Deere / 7020 Series published in 2005, by John Deere / Get around-the-clock performance with the new 7020 Series Tractors published in 2003, by John Deere |
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Speeds
| Description | With Group 46 rear tires. Reverse speeds are about 4% faster than corresponding forward speed. / With Group 46 rear tires. Reverse speeds are about 4% faster than corresponding forward speed. |
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