The John Deere 420 is a 2WD lawn and garden tractor from the 400 series. This tractor was manufactured by John Deere in Horicon, Wisconsin, USA from 1983 to 1991. The John Deere 420 is equipped with one of two engines: Onan B48G (0.8 L) or Onan P220G (0.8 L) and shaft-driven hydrostatic transmission with infinite forward and reverse gears.
The John Deere 420 lawn tractor used the Onan B48G (early version, before 1986) or Onan P220G (later version, from 1987).
The Onan B48G is a 0.8 L, 782 cm2, (47.7 cu·in) two-cylinders gasoline engine with 82.55 mm (3.25 in) of cylinder bore and 73.0 mm (2.87 in) of piston stroke. The compression ratio rating is 7.0:1. This engine produced 20.3 PS (14.9 kW; 20 HP) at 3,600 rpm of maximum output power.
The Onan P220G is a 0.8 L, 782 cm2, (47.7 cu·in) two-cylinders gasoline engine with 82.55 mm (3.25 in) of cylinder bore and 73.0 mm (2.87 in) of piston stroke. The compression ratio rating is 7.0:1. This engine produced 20.3 PS (14.9 kW; 20 HP) at 3,600 rpm of maximum output power. Both engines used a full pressure lubrication system, a dry-type air cleaner with pre-cleaner, pulse type fuel pump and fixed jet carburetor.
The JD 420 is equipped with hydrostatic power steering; mechanical rear differential lock; shoe and drum brakes on rear wheels; open operator station and 25.0 liters (6.6 US gal.; 5.5 Imp. gal) fuel tank.
Following attachments are available for the John Deere 420 lawn and garden tractor:
- John Deere M01012: mid-mount 50 in (1,270 mm) 3-blade mower deck with hydraulic lift
- John Deere: mid-mount 60 in (1,520 mm) 3-blade mower deck with hydraulic lift
- John Deere 0042M: front-mount 54 in (1,370 mm) blade
- John Deere 0062M: front-mount 46 in (1,160 mm) dual-stage snowblower with hydraulic lift
- John Deere 2752M: front-mount 47 in (1,190 mm) dual-stage snowblower with hydraulic lift
- John Deere 44 loader
John Deere 420 Specifications
| General Specifications | |
| Model | John Deere 420 |
| Length | 1,955 mm (77 in) |
| Width | 1,310 mm (51.6 in) |
| Height | 1,205 mm (47.4 in) |
| Wheel base | 1320 mm (52 in) |
| Weight (net) | 408 kg (899 lbs) |
| Fuel tank capacity | 25.0 liters (6.6 US gal.; 5.5 Imp. gal) |
| Battery | 12V BCI Group 22F |
| Cabin type | Open operator station |
| Engine | |
| Engine model | Onan B48G |
| Engine type | Four-stroke, air-cooled, inline |
| Cylinders | 2 |
| Fuel type | Gasoline |
| Displacement | 0.8 L, 782 cm2, (47.7 cu·in) |
| Bore and stroke | 82.55 mm X 73.0 mm (3.25 in X 2.87 in) |
| Compression ratio | 7.0:1 |
| Horsepower | 20.3 PS (14.9 kW; 20 HP) at 3,600 rpm |
| Torque | 43 N·m (4.4 kg·m, 31.7 ft·lb) |
| Starter | Electric |
| Oil capacity: | 1.4 L (1.48 US. qt, 1.23 Imp. qt.) |
| Spark plug | NGK BPR5EF, Champion RS14YC |
| Engine | |
| Engine model | Onan P220G |
| Engine type | Four-stroke, air-cooled, inline |
| Cylinders | 2 |
| Fuel type | Gasoline |
| Displacement | 0.8 L, 782 cm2, (47.7 cu·in) |
| Bore and stroke | 82.55 mm X 73.0 mm (3.25 in X 2.87 in) |
| Compression ratio | 7.0:1 |
| Horsepower | 20.3 PS (14.9 kW; 20 HP) at 3,600 rpm |
| Torque | 43 N·m (4.4 kg·m, 31.7 ft·lb) at rpm |
| Starter | Electric |
| Oil capacity: | 1.4 L (1.48 US. qt, 1.23 Imp. qt.) |
| Spark plug | NGK BPR5EF, Champion RS14YC |
| Transmission and chassis | |
| Chassis | 4×2 2WD |
| Steering type | Hydrostatic power |
| Brakes | Shoe and drum on rear wheels |
| Transmission model | Sundstrand 90 |
| Transmission type | Shaft-driven hydrostatic |
| Gears | Infinite forward and reverse |
| Speed | Forward: 12.4 kmh (7.7 mph) Reverse: 6.2 (3.9 mph) |
| Transmission oil capacity | 7.1 L (7.5 US. qt, 6.25 Imp. qt.) |
| Tires | |
| Front tires | Lawn/turf: 18×8.50-8 |
| Rear tires | Lawn/turf: 26×12.00-12 |
| PTO (Power take-off shaft) | |
| Front PTO type | Independent with electric clutch |
| Front PTO spped | 3,450 rpm |
| Rear PTO type | Independent with electric clutch (option) |
| Rear PTO spped | 2,000 rpm |
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