Lawn Tractor · 1983Unverified
John Deere 420
John Deere 420 — 400 Series · 20 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
20 hp
Weight
450 kg
Hover a source tag to verify
Overview
ManufacturerJohn DeereReference
Garden tractorReference
Built in Horicon, Wisconsin, USAReference
Original price$6,489 (1983 )Reference
Original price$7,700 (1992 )Reference
Two-wheel driveReference
Differential lockmechanical rearReference
Power steeringReference
Differential mechanical drum brakesReference
Open operator station.Reference
Engine
20HP Onan 781cc 2-cyl gasolineReference
Fuel tank24.6 LReference
Onan B48GReference
gasolineReference
2-cylinderReference
air-cooled horizontal-shaft opposed-twinReference
The B48G was the original engine on the Deere 420, used through the 1986 model year.Reference
Displacement47.7 ciReference
Bore/Stroke83 x 73 mmReference
Power (gross)14.9 kWReference
Air cleanerfoam and paperReference
Compression7.0:1Reference
Rated RPM3500Reference
Idle RPM1000-3450Reference
Starter volts12Reference
Oil capacity1.7 LReference
Onan P220GReference
The P220G replaced the B48G in the John Deere 420 during the 1987 model year, starting at tractor serial number 420001.Reference
Bore/Stroke83 x 73 mmReference
Power14.9 kWReference
Rated RPM3600Reference
SparkplugNGK BPR5EFSReference
SparkplugChampion RS14YCReference
Image courtesy of Terry RussellReference
Transmission
hydrostaticReference
TransmissionSundstrand Series 15 Model 90Reference
Typeshaft-driven hydrostaticReference
Gearsinfinite forward and reverse (2-range)Reference
Oil capacity7.1 LReference
Oil typeJD Hy-GardReference
1ThrottleReference
2Forward/reverseReference
3Left brakeReference
4Right brakeReference
5Range shiftReference
6Differential lockReference
PTO & Hydraulics
Rear Type0Reference
Controldirectional controlReference
Rear lift290 kgReference
Rear PTOindependentReference
ClutchelectricReference
Rear PTO Type2000Reference
Front PTOindependentReference
Front PTO TypepulleyReference
Dimensions
Wheelbase132 cmReference
Weight450 kgReference
Front tire18x8.50-8Reference
Rear tire26x12.00-12Reference
Ag front4.80x4.00-8Reference
Ag rear23x10.50-12Reference
Lawn/turf front18x8.50-8Reference
Lawn/turf rear26x12.00-12Reference
Length195 cmReference
Width130 cmReference
Height120 cmReference
Front tread91 cmReference
Rear tread81/98 cmReference
Shipping450 kgReference
Max front axle480 kgReference
Max rear axle816 kgReference
John Deere 420 attachments
50" mid-mount mower deckReference
60" mid-mount mower deckReference
snowblowerReference
bladeReference
front-end loaderReference
420 Serial Number Location
Serial number plate below steering column.Reference
420 Serial Numbers
1983M00420X222001Reference
1984M00420X285001Reference
1985M00420X315001Reference
1986M00420X360001Reference
1987M00420X420001Reference
1988M00420X475001Reference
1989M00420X595001Reference
1990M00420X010001Reference
1991M00420X100001Reference
FAQ: How to read a serial number table.Reference
Electrical
GroundnegativeReference
Charging systemalternatorReference
Charging amps20Reference
Battery volts12Reference
Battery GroupBCI 22FReference
Attachment overview
50" mid-mount mower deckReference
60" mid-mount mower deckReference
SnowblowerReference
BladeReference
Front-end loaderReference
A rear-mounted finish mower was available for the 420 if the tractor was equipped with 2000 RPM rear PTO and a three-point hitch.Reference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.