International Harvester TD-6 Series 61
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| Production | |
| Manufacturer | International Harvester |
| Agricultural Crawler tractor | |
| Built in Melrose Park, Illinois, USA | |
| Variants | |
| T-6 Series 61 | gasoline engine |
| International Harvester TD-6 Series 61 Engine | |
| International Harvester 4.3L 4-cyl diesel | |
| Fuel tank | 33 gal 124.9 L |
| Aux. fuel | 0.66 gal 2.5 L |
 Engine details ... | |
| International Harvester TD-6 Series 61 Power | |
| Engine (net) | 50 hp 37.3 kW |
| Drawbar (claimed) | 41.5 hp 30.9 kW |
| Belt (claimed) | 46 hp 34.3 kW |
| Drawbar (tested) | 31.91 hp 23.8 kW |
| Belt (tested) | 48.99 hp 36.5 kW |
 Performance test details ... | |
| Mechanical | |
| Drive | crawler |
| Final drives | bull gear |
| Manual contracting band brakes | |
| Open operator station. | |
| Power Take-off (PTO) | |
| Rear PTO Type | 540 (1.375) |
| Dimensions & Tracks | |
| Weight | 8160 lbs 3701 kg |
| 12-inch tracks | |
 Full dimensions and tracks ... | |
| TD-6 Series 61 Serial Numbers | |
| 1956 | 38951 |
| 1957 | 39817 |
| 1958 | 40822 |
| 1959 | 41448 |
FAQ: How to read a serial number table. | |
| Electrical | |
| Charging system | generator |
| Batteries | 2 |
| Battery volts | 6 |
| References | |
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| TD-6 (61 Series) Diesel Crawler Tractor published in 1956, by International Harvester |
| Page information | |
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| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on June 9, 2025 |