Crawler Tractor - Caterpillar D2

Production date
1939
Country
USA
State/Province
Illinois
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Object detail

Description
This is a 1939 Caterpillar crawler tractor D2 with a four cylinder diesel engine. It is painted yellow with black logo lettering, some black trim and a black seat. It has a petrol tank attached to the back of the metal seat. "CATERPILLAR" is cast onto a yellow metal plate that has been attached to the front panel of the engine. "CATERPILLAR D2" has been cast onto a yellow metal plate vertically and attached to both sides of the radiator panel towards the front of the crawler tractor. It has an overhead valve.
Classification
CH classification RURAL INDUSTRY Farm Machinery tractor
CH classification CONSTRUCTION Crawler tractor
Production date
1939
Production place
Measurements
L2840 x W1570 x H1875mm
Weight 3365kg
Bore 101.6mm
Stroke 127mm
RPM 1650
Drawbar 38 HP
Belt 41.86 HP
Media/Materials description
Steel
Vinyl
Paint
Rubber
Plastic
Glass
Signature/Marks
CATERPILLAR \ REG. US. PAT. OFF.
CATERPILLAR \ REG. US. PAT. OFF.
D2
DIESEL
(wavy) CATERPILLAR \ REG. US. PAT. OFF
TRACTOR NUMBER \ 3J3491SP
History and use
This tractor is a 3J series manufactured in 1939. It is a special purpose machine designated by the SP suffix on the serial number.Special Purpose indicates that the gear ratios are more closely spaced for agricultural use as opposed to wider spacing for industrial use. The D2 model was a diesel crawler tractor first manufactured in 1938. It was Caterpillar’s smallest diesel tractor. It had a Cat D3400, four cylinder, 3 3/4 x 5 inch bore and stroke diesel engine.
In 1947 the D2, 3J and 5J series, was upgraded to the 4U and 5U series. They were the same overall design but had a more powerful engine and significantly redesigned radiator housing, plus the addition of a dip-stick for the oil level in the gear box.
The model D2, 3J and 5J series were manufactured from 1938 to 1947. The 4U and 5U series were produced from 1947 to 1957. The 3J and 4U had a standard 40inch wide track gauge and the 5J and 5U had a 50inch wide track gauge. The original price was US$1,400. The total number of D2s produced was 26,454
Registration number
R6655

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