Tractor · 1935Unverified
John Deere AOS
John Deere AOS — Standard-tread tractor · 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
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.