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Tractor · 1935Unverified

John Deere AOS

Name: John Deere AOS
Brand: John Deere

John Deere AOS — Standard-tread tractor · 18 hp. Reference specifications; pending source verification.

The John Deere AOS tractor has a rated power of 18 hp, positioning it at the lower end of its class in terms of power output. Manufactured from 1935 to 1949, this model features a 2-cylinder electric liquid-cooled engine, coupled with two-wheel drive and a 4-speed gearbox. Suitable for cultivation and other operations on areas of up to 200 acres. Key specifications for the UK and US variants are provided.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

18 hp

Catalogue coverage

Variants represented

Richest spec table

66 rows

Recorded power

18 hp

Transmissions

4-speed unsynchronized gear

Production years

1935-1949

Verified variants

1 linked source document displayed

Hover a source tag to verify

Overview

ManufacturerJohn DeereReference

Standard-tread tractorReference

Built in Waterloo, Iowa, USAReference

Total built820Reference

The John Deere AO Streamlined (AOS) was a modified version of the AR/AO. The AOS was lower, narrower, and shorter than the AO which allowed for greater maneuverability and improved clearance in narrow crop operations.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

AWHHigh-crop, adjustable wide-frontReference

ANHHigh-crop, single-front wheelReference

Engine

John Deere 5.1L 2-cyl all fuelReference

Fuel tank60.6 LReference

Aux. fuel3.8 LReference

Drawbar (claimed)13.4 kWReference

Belt (claimed)17.9 kWReference

Plows2Reference

John DeereReference

all fuelReference

2-cylinderReference

liquid-cooled horizontal twinReference

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

Transmission

4-speed unsynchronized gearReference

TransmissionJohn DeereReference

Typeunsynchronized gearReference

Gears4 forward and 1 reverseReference

Clutchdry discReference

PTO & Hydraulics

Rear PTOtransmissionReference

Rear PTO Type540Reference

Dimensions

Wheelbase174 cmReference

Rear tire11.25x24Reference

Ag rear11.25x24Reference

Ag rear12.75x24Reference

Width154 cmReference

Height (hood)134 cmReference

Front tread106 cmReference

Rear tread115 cmReference

AOS Serial Number Location

Left side of frame, above flywheelReference

AOS Serial Numbers

19371000Reference

19381539Reference

19391700Reference

19401767Reference

19411878Reference

Final1891Reference

FAQ: How to read a serial number table.Reference

Capacities

Diameter32 cmReference

Width15 cmReference

RPM975Reference

Speed996.70 meters/minReference

Electrical

GroundpositiveReference

Battery volts6Reference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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