John Deere Unstyled D

The John Deere Unstyled D is a tractor produced by John Deere. It is equipped with a 501 ci 8.2 L engine. Transmission: 3 forward and 1 reverse. Operating weight: 4090 lbs (early) 1855 kg.

Fuel & Capacities

4.3 gal/hour 16.3 l/hour

Transmission

3 forward and 1 reverse

Operating Weight

4090 lbs (early) 1855 kg

Overview

	1923 - 1953 Model year 1923-19391939-1953 Two-Cylinder Letter SeriesStandard-tread tractor Two-Cylinder Letter Series Standard-tread tractor

Production
Manufacturer	John Deere
Standard-tread tractor
Built in Waterloo, Iowa, USA
Total built	160,000
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 Power
Drawbar (claimed)	15 hp 11.2 kW
Belt (claimed)	27 hp 20.1 kW
Plows	3 (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 PTO	optional
Rear PTO Type	525

Dimensions & Tires
Weight	4090 to 5880 pounds
Front tire	28x5
Rear tire	46x12
Full dimensions and tires ...

Belt Pulley
Diameter	13.25 inches 33 cm
Width	8.5 inches 21 cm
RPM	900
Speed	3122 ft/min 951.59 meters/min

References

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
*Publication contains known errors.

Engine

Engine options
John Deere 7.6L 2-cyl all fuel
John Deere 8.2L 2-cyl all fuel

Engine Detail — 465 ci / 7.6 L

Manufacturer	John Deere
Configuration	2-cylinder, liquid-cooled
all fuel
Used from beginning until 1927, S/N 53388
Displacement	465 ci 7.6 L
Bore/Stroke	6.50x7.00 inches 165 x 178 mm
Compression	3.91:1
Rated RPM	800
Firing order	1-2
Coolant capacity	52 qts 49.2 L

Engine Detail — 501 ci / 8.2 L

Manufacturer	John Deere
Configuration	2-cylinder, liquid-cooled
all fuel
The larger 501 cubic inch engine was introduced in 1927, replacing the 465..
Displacement	501 ci 8.2 L
Bore/Stroke	6.75x7.00 inches 171 x 178 mm
Compression	3.91:1
Rated RPM	900
Firing order	1-2
Oil capacity	13 qts 12.3 L
Coolant capacity	52 qts (early) 49.2 L
	56 qts (after 1931) 53.0 L

Transmission

Transmission options
2-speed unsynchronized gear
3-speed unsynchronized gear

Transmission — 2 forward and 1 reverse unsynchronized gear

Type	unsynchronized gear
Gears	2 forward and 1 reverse
Original transmission, used from 1923 to 1935

Transmission — 3 forward and 1 reverse unsynchronized gear

Type	unsynchronized gear
Gears	3 forward and 1 reverse
Three-speed transmission was introduced in 1935

Dimensions

John Deere D Tires
Ag front	28x5 (steel)
	28x6 (steel)
	7.50x18
Ag rear	46x12 (steel)
	12.75x28

Dimensions
Length	109 inches (prior to 1930) 276 cm
	130 inches (after 1930) 330 cm
Width	56 inches 142 cm
	66.5 inches 168 cm
Weight	4090 lbs (early) 1855 kg
	5880 lbs (late) 2667 kg

John Deere D Height
Hood	56 inches (prior to 1930) 142 cm
	58 inches (1930 to 1934) 147 cm
	61.25 inches (after 1934) 155 cm

Tests

Tractor Tests
NTTL 102: 465ci kerosene 2-speed 2WD
NTTL 236: 501ci distillate 3-speed 2WD

Nebraska Tractor Test 102
465ci kerosene 2-speed 2WD April 11 - 17, 1924 Link: Nebraska Tractor Test 102 file
Belt power (max)	30.40 hp 22.7 kW
Belt fuel use (max)	3.9 gal/hour 14.8 l/hour
Drawbar performance
Max power	22.53 hp 16.8 kW
Max pull	3,277 lbs 1486 kg

Nebraska Tractor Test 236
501ci distillate 3-speed 2WD June 26 - July 2, 1935 Link: Nebraska Tractor Test 236 file
Belt power (max)	41.59 hp 31.0 kW
Belt fuel use (max)	4.3 gal/hour 16.3 l/hour
Drawbar performance
Max power	29.90 hp 22.3 kW
Gear 2 used for power test.
Max pull	4,037 lbs 1831 kg

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for John Deere Unstyled D.

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)

Standard Spec: API CK-4 / CJ-4 Heavy Duty

Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)

Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)

Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix

Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze

Service Interval: 2 Years / 1500 Hours