 International TD-18, unrestored. at tractor show | |
| Model history | |
|---|---|
| Model introduced | 1938 |
| Model discontinued | 1949 |
| Model status | Discontinued |
| No. produced | 22,040 |
| Preceded by | New model |
| Superseded by | International TD-18A |
| Engine Specification | |
| Engine make | International |
| Engine model | D-691 |
| Fuel type | diesel |
| Power hp | 81 belt, 72 drawbar |
| Governed rpm | 1200 |
| Displacement cu in /(litre) | 691 ci |
| No. of Cylinders | 6 |
| Bore in (mm) | 4.75" |
| Stroke in (mm) | 6.5" |
| Cooling system | water |
| Naturally aspirated, Turbo or Supercharged | NA |
| Transmission Details | |
| Transmission type | dual-range sliding gear |
| Clutch | Rockford single plate |
| Gearbox make | International |
| Forward | 6 |
| Reverse | 2 |
| Drive | crawler |
| General Data | |
| Linkage Category | drawbar |
| Tyre Sizes (std/options) | |
| Front | 18" tracks |
| Tractor Dimensions | |
| Length (inches/metres) | 158" |
| Width (inches/meters) | 94" |
| Height (inches/meters) | 90" |
| Weight (nominal) lb/kg | 22000 lb |
| Turning circle (nominal) inches/meters | 18 ft |
| Wheelbase | 74" gauge |
| Other info | |
| Factories | Melrose Park, Illinois, USA |
| Plow rating | |
| Nebraska Tests No. | 315 |
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A Large IH TD18 at newark 2008
The International TD-18 was a diesel engined crawler tractor built by the International Harvester company from 1938 to 1949 in Melrose Park, Illinois, USA.
Model history[]
- For Company history, see International Harvester.
The International TD-18 was the first tractor with International’s striking new styling theme, with smoothly rounded corners and a grille with a single vertical center bar and numerous fine horizontal bars sweeping around to line up with similar bars in the hood side panels. The TD-18 was also the first International to use a new numbering system and it was the biggest crawler the company had made, weighing almost 11 tons. The new 691 ci 6-cylinder diesel had the same bore and stroke as the 4-cylinder in the McCormick-Deering TD-40 and it retained the gasoline starting feature. The TD-18 developed 80 belt and 72 drawbar hp. The transmission was a 6-speed dual range unit.
The other major crawler manufacturers in 1939 were Allis-Chalmers, Caterpillar, and Cletrac. Allis-Chalmers didn’t make a full diesel in 1939 but its S-O semi-diesel was in the same class as the International TD-18. The S-O was un unstyled model first built in 1937. Its big 4-cylinder engine ran at lower rpm than the International and the power output was a little lower. The Caterpillar D-7 Series 9G, introduced in 1936 as the RD-7, developed considerably less power than the TD-18 at its normal 850 rpm operating speed. The Cletrac DD was a much smaller tractor, about the size of the International TD-40. In 1940 Allis-Chalmers brought out the HD-10. It was a styled model about the same size as the TD-18 but its General Motors 2-cycle full-diesel engine produced considerably more power, 98 belt hp at a high 1,600 rpm. The A-C also had a 6-speed transmission like the International. In 1941 Caterpillar introduced the revised D-7 Series 7M. It weighed about 3,000 lb more than the TD-18 and had more power (89 belt hp) at its new 1,000 rpm governed speed. In mid-1944 Caterpillar produced the even more powerful D-7 Series 3T. International was falling behind its competitors in this class and the TD-18 was replaced by the heavier and more powerful TD-18A in 1949.
Timeline[]
- 1938 - International TD-18 introduced
- 1949 - International TD-18A replaced the original TD-18
Factory locations[]
- Melrose Park, Illinois, USA
Specification[]
See Infobox for basic details
- Track gauge: 62" or 74"
- Track shoe width: 18" (1940); 20" (1948)
- Electric starting
Variations and Options[]
- Wide-gauge version
- Optional track shoe width: 14", 16", 19", 20", 22", or 24"
- Belt pulley
- Pto
- Electric lights
Serial Numbers Information[]
| Year | Serial no. run start |
Serial no. run End |
Number Built | Notes |
|---|---|---|---|---|
| 1938 | TDR501 | 519 | 19 | Number built calculated from serial range |
| 1939 | 520 | 1239 | 720 | |
| 1940 | 1240 | 2290 | 1051 | |
| 1941 | 2291 | 3604 | 1314 | |
| 1942 | 3605 | 5804 | 2200 | |
| 1943 | 5805 | 6889 | 1095 | |
| 1944 | 6890 | 9010 | 2111 | |
| 1945 | 9011 | 11090 | 2080 | |
| 1946 | 11091 | 12643 | 1553 | |
| 1947 | 12644 | 14625 | 1982 | |
| 1948 | 14626 | 16708 | 2083 | |
| 1949 | 16709 | 22535 | 5827 | |
| Total built | 22040[1] | |||
Preservation[]
No information on any individual examples of these tractors in preservation is currently available on here.
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Gallery[]
Add extra photos here please.
See also[]
- Collection related info
- Shows and Meets - events featuring tractors and other machinery
- Clubs Listing - List of clubs including various tractor marques
- Collections - list of private collections with tractors (add yours)
- Museums - includes museums featuring tractors (please add missing ones)
References / Sources[]
- ↑ Klancher, Lee, International Harvester Photographic History, Motorbooks International, Osceola, Wisconsin, 1996
External Links[]
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