John Deere 420

John Deere 420The 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