International Harvester TD-6
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| Production | |
| Manufacturer | International Harvester |
| Agricultural Crawler tractor | |
| Built in Melrose Park, Illinois, USA | |
| Total built | 38,450 |
| International Harvester TD-6 Engine | |
| International Harvester 4.1L 4-cyl diesel | |
| Fuel tank | 20 gal 75.7 L |
| Aux. fuel | 0.66 gal 2.5 L |
 Engine details ... | |
| International Harvester TD-6 Power | |
| Drawbar (claimed) | 22 hp 16.4 kW |
| Belt (claimed) | 31 hp 23.1 kW |
| Plows | 4 |
| Drawbar (tested) | 31.75 hp 23.7 kW |
| Belt (tested) | 38.20 hp 28.5 kW |
 Performance test details ... | |
| Mechanical | |
| Drive | crawler |
| Final drives | bull gear |
| Open operator station. | |
| Power Take-off (PTO) | |
| Rear PTO Type | 540 (1.375) |
| Dimensions & Tracks | |
| Weight | 7280 to 7800 pounds |
| 10-inch tracks | |
 Full dimensions and tracks ... | |
| TD-6 Serial Number Location | |
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| Serial number plate on dashboard. |
| TD-6 Serial Numbers | |
| 1940 | TDBK501 |
| 1941 | TDBK4435 |
| 1942 | TDBK8191 |
| 1943 | TDBK9297 |
| 1944 | TDBK9581 |
| 1945 | TDBK10828 |
| 1946 | TDBK12056 |
| 1947 | TDBK14516 |
| 1948 | TDBK17349 |
| 1949 | TDBK21146 |
| 1950 | TDBK24862 |
| 1951 | TDBK27536 |
| 1952 | TDBK31056 |
| 1953 | TDBK33157 |
| 1954 | TDBK35746 |
| 1955 | TDBK37470 |
| 1956 | TDBK38706 |
FAQ: How to read a serial number table. | |
| Belt Pulley | |
| Diameter | 12.25 inches 31 cm |
| Width | 8 inches 20 cm |
| RPM | 811 |
| References | |
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| Crawler Tractors for Agriculture - Confidential Sales Manual published in 1951, by International Harvester | |
| TD-6 Diesel TracTracTors published by International Harvester | |
| General Line Catalog published in 1949, by International Harvester |
| Page information | |
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| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on April 24, 2025 |