| Manufacturer | John Deere |
| Price | - |
| Model | 9420 |
| Equipment Type | Four-wheel Drive 4WD Tractors |
| Factory | Waterloo, Iowa, USA |
OCED TRACTOR TEST 1733 2
| Description | Diesel 24-speed 4WD May 2 - June 18, 1997 Link: OCED Tractor Test 1733 file PTO performance Drawbar performance |
| Power at rated engine speed | 312.25hp / 232.8kW |
| Fuel use | 20.3gal/hour / 76.8l/hour |
| Power at rated PTO speed | 343.44hp / 256.1kW |
| Max power | 345.00hp / 257.3kW |
| Max pull | 38,409lbs / 17422kg |
JOHN DEERE 9420 POWER
| Engine | 425hp / 316.9kW |
| PTO (claimed) | 316hp / 235.6kW |
| Drawbar (tested) | 345.00hp / 257.3kW |
| PTO (tested) | 312.25hp / 232.8kW |
ENGINE DETAIL
The John Deere 9420 features a robust 12.5L turbocharged diesel engine, delivering 425hp, which is ideal for heavy-duty applications in agriculture or construction. With a high compression ratio of 17:1 and an operating range of 1500-2100 RPM, it balances efficiency and power, facilitating optimal torque performance during demanding tasks. However, the dry air cleaner may require more frequent maintenance in dusty environments, which could impact overall uptime and efficiency.
| Description | John Deere turbocharged diesel 6-cylinder liquid-cooled |
| Displacement | 765ci / 12.5L |
| Bore/Stroke | 5.00x6.50inches / 127x 165mm |
| Power | 425hp / 316.9kW |
| Air cleaner | dry |
| Compression | 17:1 |
| Rated RPM | 2100 |
| Operating RPM | 1500-2100 |
| Starter volts | 12 |
| Coolant capacity | 64qts / 60.6L |
ENGINE OIL
The John Deere 9420 has an oil capacity of 44 quarts (41.6 liters), ensuring adequate lubrication for its powerful engine to maintain optimal performance and longevity. A larger oil capacity can enhance cooling and prolong oil change intervals, although it may pose challenges in monitoring oil levels. In scenarios involving extended operations, such as large-scale farming, this capacity supports continuous use, minimizing downtime for maintenance.
| Oil capacity | 44qts / 41.6L |
JOHN DEERE 9420 ENGINE
The John Deere 9420 is equipped with a 12.5L 6-cylinder diesel engine, providing high torque output and excellent fuel efficiency, ideal for demanding agricultural tasks such as plowing and heavy towing. This tractor features a robust drivetrain and advanced hydraulic systems, allowing for effective implementation of larger attachments and implements. However, its substantial size and weight may pose challenges in maneuverability on uneven terrain or in tight fields.
| Description | John Deere 12.5L 6-cyl diesel |
TRANSMISSIONS OVERVIEW
The John Deere 9420 features a 24-speed partial power shift transmission, allowing for versatile speed control and efficient field operation, along with an optional 18-speed full power shift for smoother gear transitions. The partial power shift is advantageous for tasks requiring frequent speed changes, while the full power shift enhances operator comfort during continuous operation. However, the complexity of maintenance for these systems can be a challenge, necessitating skilled service technicians to ensure optimal performance.
| Description | 24-speed partial power shift 18-speed full power shift |
TRANSMISSION 1
The John Deere 9420 features a partial power shift transmission with 24 forward and 6 reverse gears, allowing for versatile operation across varied terrains. Its synchronized shifting enhances efficiency during gear transitions, though it restricts reverse gear functionality in range D, which could limit maneuverability in certain scenarios, like tight field turns. Understanding its oil capacity (136 qts) is crucial for maintenance, ensuring optimal performance and preventing transmission failure.
| Transmission | John Deere PowerSync |
| Type | partial power shift |
| Gears | 24 forward and 6 reverse |
| Oil capacity | 136qts / 128.7L 140qts / 132.5L (with PTO) |
| Description | Four ranges (A-D) and three gears (1-3) with high-low power shift. Synchronized shifting between ranges A-B, B-C, and C-D. Gear shifts are synchronized between 1-R, 1-2, and 2-3. Reverse gear does not operate in D range |
SPEEDS 1
| Description | With 710/70R42 tires |
TRANSMISSION 2
The John Deere 9420 features a Powershift transmission with 18 forward and 6 reverse gears, enabling seamless power transfer and efficient operation in various field conditions. The substantial oil capacity of up to 145.6 quarts with PTO ensures optimal lubrication and cooling, minimizing downtime during extended use. However, the complexity of a full power shift system may require skilled operation and maintenance for optimal performance.
| Transmission | John Deere Powershift |
| Type | full power shift |
| Gears | 18 forward and 6 reverse |
| Oil capacity | 141.6qts / 134.0L 145.6qts / 137.8L (with PTO) |
SPEEDS 2
| Description | With 800/70R38 tires |
MECHANICAL
The John Deere 9420 features a 4x4 articulated 4WD chassis, enhancing traction and stability in diverse terrain, making it advantageous for heavy-duty tasks like tillage and hauling. Its hydrostatic articulated steering ensures precise maneuverability, while the hydraulic wet disc brakes provide reliable stopping power under load. With a 24-speed partial power shift and an 18-speed full power shift transmission, operators can achieve optimal performance and efficiency, although the complexity of the shifting system may require a steeper learning curve for new users.
| Chassis | 4x4 articulated 4WD |
| Steering | hydrostatic articulated |
| Brakes | hydraulic wet disc |
| Cab | CommandView cab standard with air-conditioning |
| Transmissions | 24-speed partial power shift 18-speed full power shift |
CAPACITY
| Fuel | 270gal / 1022.0L |
| Hydraulic system | 27gal / 102.2L 28gal / 106.0L (with 3pt) 30gal / 113.6L (hi-flow) 31gal / 117.3L (hi-flow/3pt) |
HYDRAULICS
| Type | closed center pressure flow compensated |
| Capacity | 27gal / 102.2L 28gal / 106.0L (with 3pt) 30gal / 113.6L (hi-flow) 31gal / 117.3L (hi-flow/3pt) |
| Pressure | 2900psi / 200.0bar |
| Valves | 4 or 5 |
| Pump flow | 30gpm / 113.6lpm |
| Total flow | 44gpm / 166.5lpm 48gpm / 181.7lpm (Powershift) 78gpm / 295.2lpm (hi-flow) |
TRACTOR HITCH
| Rear Type | III/IV/IVN |
| Rear lift | 13,871lbs / 6291kg 14,445lbs / 6552kg (optional) |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 1000 |
JOHN DEERE 9420 TIRES
The John Deere 9420 tractor equipped with 710/70R42 tires both front and rear offers superior flotation and traction, making it highly effective for large, heavy-duty farming operations, especially in wet conditions. The wide tires reduce soil compaction, enhancing crop growth but may limit maneuverability in tight spaces. Keep in mind that this configuration may also increase operational costs due to larger tire replacement and maintenance expenses.
| Ag front | 710/70R42 |
| Ag rear | 710/70R42 |
DIMENSIONS
| Wheelbase | 137.8inches / 350cm |
| Length | 274inches / 695cm 289inches / 734cm (with hitch) |
| Width | 115.5inches / 293cm |
| Clearance (front axle) | 28.8inches / 73cm |
| Clearance (drawbar) | 17inches / 43cm |
JOHN DEERE 9420 WEIGHT
| Shipping | 34,870lbs / 15817kg |
| Operating | 37,246lbs / 16894kg (620/70R42 duals) |
| Ballasted | 41,456lbs / 18804kg |
JOHN DEERE 9420 HEIGHT
| Hood | 97.5inches / 247cm |
| Cab | 137.5inches / 349cm |
| Exhaust | 140inches / 355cm |
DIMENSIONS & TIRES
The John Deere 9420 features a substantial wheelbase of 137.8 inches, enhancing stability and traction on uneven terrain, making it ideal for large-scale farming and heavy-duty applications. Its weight range of 34,870 to 37,246 pounds provides substantial ballast, improving ground contact and preventing slippage. Equipped with 710/70R42 tires, it offers excellent flotation and reduced soil compaction, though the larger tire size may limit maneuverability in tight spaces.
| Wheelbase | 137.8inches / 350cm |
| Weight | 34870 to 37246 pounds |
| Front tire | 710/70R42 |
| Rear tire | 710/70R42 |
9420 SERIAL NUMBERS
| Location | On the top-left of rear hinge member |
| 2002 | 1001 |
| 2003 | 10001 |
| 2004 | 20001 |
| 2005 | 30001 |
| 2006 | 40001 |
| 2007 | 50001 |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 140 |
| Batteries | 3 |
| Battery CCA | 925 |
| Battery volts | 12 |