Tractor · 1935Unverified
John Deere AR Unstyled
John Deere AR Unstyled — Model year 1935-19411950-1953 · 18 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
18 hp
Max power
19.8 kW
Weight
2154 kg
Hover a source tag to verify
Overview
ManufacturerJohn DeereReference
Standard-tread tractorReference
Built in Waterloo, Iowa, USAReference
AR Total built17,394Reference
AO Total built2,686Reference
Original price was $2,300 in 1951Reference
The AR/AO was the "regular", or fixed-tread version of the model A. The AR was the fixed tread version for general use, the AO was the orchard version. From 1936 until 1941, an AI industrial model was also made.Reference
Two-wheel driveReference
Manual steeringReference
Mechanical shoe brakesReference
Open operator station with pressed steel seat.Reference
Variants
ARow-cropReference
ARStandard front axleReference
AOOrchardReference
AOSnarrow orchardReference
AWAdjustable wide-frontReference
ANSingle front wheelReference
AHHigh-cropReference
Engine
John Deere 5.1L 2-cyl all fuelReference
John Deere 5.3L 2-cyl all fuelReference
Drawbar (claimed)13.4 kWReference
Belt (claimed)17.9 kWReference
Plows2Reference
Drawbar (tested)19.8 kWReference
Belt (tested)22.6 kWReference
John DeereReference
all fuelReference
2-cylinderReference
liquid-cooled horizontal twinReference
Original engine, used until 1940 at serial number 259334.Reference
Displacement5.1 LReference
Bore/Stroke140 x 165 mmReference
Cooling systemthermo-siphonReference
Air cleaneroil bathReference
Compression3.96:1Reference
Rated RPM975Reference
Firing order1-2Reference
Oil capacity8.8 LReference
Coolant capacity30.3 LReference
Sparkplug gap0.762 mmReference
liquid-cooledReference
Larger engine, introduced in 1940 (serial number 260000)Reference
Displacement5.3 LReference
Bore/Stroke140 x 171 mmReference
Compression4.45:1Reference
Oil capacity10.4 LReference
Belt power (max)22.6 kWReference
Max power19.8 kWReference
Transmission
4-speed unsynchronized gearReference
TransmissionJohn DeereReference
Typeunsynchronized gearReference
Gears4 forward and 1 reverseReference
Clutchdry discReference
Capacities
Fuel60.6 LReference
Aux. fuel3.8 LReference
Diameter32 cmReference
Width18 cmReference
RPM975Reference
Speed996.70 meters/minReference
PTO & Hydraulics
Hydraulic system7.9 LReference
TypePowr-TrolReference
Capacity7.9 LReference
Valves1Reference
Pump flow33.7 lpmReference
Rear PTOtransmissionReference
Rear PTO Type540Reference
Dimensions
Weight2154 kgReference
Front tire28x6Reference
Rear tire42.75x10Reference
Ag front28x6 (steel)Reference
Ag front6.00-16Reference
Ag rear42.75x10 (steel)Reference
Ag rear11.25-24Reference
Ag rear12.75-24Reference
Ag rear11-26Reference
Ag rear12-26Reference
Length314 cmReference
Width162 cmReference
Height (hood)139 cmReference
Operating weight2154 kgReference
Ballasted weight2880 kgReference
Rear axle69 mmReference
Front tread121 cmReference
Rear tread131 cmReference
AR Serial Number Location
Left side of frame, above flywheelReference
AR Serial Numbers
1935250000 (Unstyled)Reference
1936251486 (Unstyled)Reference
1937253521 (Unstyled)Reference
1938255416 (Unstyled)Reference
1939256700 (Unstyled)Reference
1940257647 (Unstyled)Reference
1941260000 (Unstyled)Reference
1942261125 (Unstyled)Reference
1943262157 (Unstyled)Reference
1944262755 (Unstyled)Reference
1945264198 (Unstyled)Reference
1946265535 (Unstyled)Reference
1947266643 (Unstyled)Reference
1948268410 (Unstyled)Reference
1949270131 (Unstyled)Reference
Final271573 (Unstyled)Reference
1950272000 (Styled)Reference
1951275938 (Styled)Reference
1952278700 (Styled)Reference
1953282351 (Styled)Reference
Final284074 (Styled)Reference
FAQ: How to read a serial number table.Reference
Electrical
GroundpositiveReference
Battery volts6Reference
Test results
5.3L all-fuel 4-speed 2WDOctober 27 - November 3, 1941Link: Nebraska Tractor Test 378 fileReference
Belt fuel use (max)11.7 l/hourReference
Drawbar performanceReference
Gear 3 used for power test.Reference
Max pull1926 kgReference
Gear 1 used for pull test.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.