John Deere Unstyled D


John Deere Unstyled D tractor photo
1923 - 1953
Model year
Two-Cylinder Letter Series
Standard-tread tractor
Series map:
D
30.0hp
Production
ManufacturerJohn Deere
Standard-tread tractor
Built in Waterloo, Iowa, USA
Total built160,000
Original price was $1,000 in 1924
The D had the longest run of any model of John Deere tractor, the styled and unstyled versions ran from March 1, 1923 until July 3, 1953. Serial numbers 31321 through 31412 are not model Ds, but are Waterloo Boy Ns which were built after model D production had begun.
John Deere D Engines
John Deere 7.6L 2-cyl all fuel
John Deere 8.2L 2-cyl all fuel
Fuel tank18 gal (early)
68.1 L
 23.5 gal (after 1931)
88.9 L
Aux. fuel2.5 gal (early)
9.5 L
 1.5 gal (after 1931)
5.7 L
Engine details ...
John Deere D Transmissions
2-speed unsynchronized gear
3-speed unsynchronized gear
Transmission details ...
John Deere D Power
Drawbar (claimed)15 hp
11.2 kW
Belt (claimed)27 hp
20.1 kW
Plows3 (14-inch)
Drawbar (tested)29.90 hp
22.3 kW
Belt (tested)41.59 hp
31.0 kW
Performance test details ...
Mechanical
Two-wheel drive
Manual steering
Open operator station with steel pan seat.
Power Take-off (PTO)
Rear PTOoptional
Rear RPM525
Dimensions & Tires
Weight4090 to 5880 pounds
Front tire28x5
Rear tire46x12
Full dimensions and tires ...
D Serial Numbers
192430401 (model years)
192531280
192635309
192743410
192853388
192971645
193095367
1931109944
1932115509
1933115665
1934116273
1935119100
1936125079
1937130700
1938138413
1939142300
Final143799

FAQ: How to read a serial number table.
D Serial Location
John Deere D serial number location
Operator's platform, ahead of seat mount.
Belt Pulley
Diameter13.25 inches
33 cm
Width8.5 inches
21 cm
RPM900
Speed3122 ft/min
951.59 meters/min
References
Unstyled D references literature
The John Deere Unstyled Letter Series by J.R. Hobbs
Tractors 1918-1976 published by John Deere
Quality Equipment for Your Farming Operations published in 1929, by John Deere
15-27 Farm Tractor published in 1927, by John Deere
Two-Cylinder Model D Tractor published in 1937, by John Deere
Instructions for Model D (DIR-3C) published in 1930
Page information
Contact: Peter Easterlund
Updated on December 5, 2020
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