International Harvester TD-9
The International Harvester TD-9 is a tractor produced by International Harvester. It is equipped with a 334.5 ci 5.5 L engine. The listed engine power is Diesel (listed): 49.5 hp (early) / 36.9 kW. Transmission: 5 forward and 1 reverse. Drive type: crawler. Operating weight: 9805 to 10800 pounds.
Engine Power
Diesel (listed): 49.5 hp (early) / 36.9 kW
Drive & Traction
crawler
Fuel & Capacities
31 gal
117.3 L
Transmission
5 forward and 1 reverse
Operating Weight
9805 to 10800 pounds
Overview
 | 1939 - 1962
Model year 1939-19551956-19591960-1962
Agricultural Crawler tractor |
|---|
Production | |
|---|---|
Manufacturer | International Harvester |
Agricultural Crawler tractor | |
Built in Melrose Park, Illinois, USA | |
Total built | 59,800 |
Variants | |
|---|---|
T-9 | gasoline |
TD-9 | diesel |
International Harvester TD-9 Engine | |
|---|---|
International Harvester 5.5L 4-cyl diesel | |
Fuel tank | 31 gal
117.3 L |
Aux. fuel | 0.7 gal
2.6 L |
Engine details ...  | |
International Harvester TD-9 Transmission | |
|---|---|
5-speed gear | |
Transmission details ...  |
International Harvester TD-9 Power | |
|---|---|
Engine | 49.5 hp
36.9 kW |
Drawbar (claimed) | 39 hp (early)
29.1 kW |
40.5 hp (late)
30.2 kW | |
Drawbar (tested) | 39.50 hp
29.5 kW |
Belt (tested) | 46.69 hp
34.8 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Drive | crawler |
Contracting band brakes | |
Open operator station. | |
Power Take-off (PTO) | |
|---|---|
Rear PTO Type | 540 (1.375) |
Dimensions & Tracks | |
|---|---|
Weight | 9805 to 10800 pounds |
13-inch tracks | |
Full dimensions and tracks ...  | |
References | |
|---|---|
 | |
Crawler Tractors for Agriculture - Confidential Sales Manual published in 1951, by International Harvester | |
TD-9 Diesel published in 1948, by International Harvester | |
TD-9 Diesel Crawler published in 1951, by International Harvester | |
TD-9 Diesel Crawler Tractor published in 1951, by International Harvester | |
General Line Catalog published in 1949, by International Harvester |
Engine
Engine Detail — 334.5 ci / 5.5 L Diesel
Manufacturer | International Harvester |
Fuel Type | Diesel |
Configuration | 4-cylinder, liquid-cooled vertical I-head |
Displacement | 334.5 ci
5.5 L |
Bore/Stroke | 4.40x5.50 inches
112 x 140 mm |
Power | 49.5 hp (early)
36.9 kW |
51.5 hp (late)
38.4 kW | |
Air cleaner | oil bath |
Compression | 15.7:1 |
Rated RPM | 1400 |
Idle RPM | 500-1555 |
Operating RPM | 900-1400 |
Firing order | 1-3-4-2 |
Starter volts | 12 |
Oil capacity | 11 qts
10.4 L |
Coolant capacity | 52 qts
49.2 L |
International Harvester TD-9 Engine | |
|---|---|
 |
Transmission
Transmission — 5 forward and 1 reverse gear
Type | gear |
Gears | 5 forward and 1 reverse |
Clutch | dry disc |
Oil capacity | 22 qts
20.8 L |
 | |
Dimensions
International Harvester TD-9 Tracks | |
|---|---|
Width | 13 inches
33 cm |
Length on ground | 63.4 inches
161 cm |
Area on ground | 1649 in²
1.1 m² |
Width | 16 inches
40 cm |
Length on ground | 63.4 inches
161 cm |
Area on ground | 2030 in²
1.3 m² |
Dimensions | |
|---|---|
Length | 114 inches
289 cm |
Width | 59 inches
149 cm |
Height (exhaust) | 79 inches
200 cm |
Gauge | 44 inches
111 cm |
Gauge | 60 inches
152 cm |
International Harvester TD-9 Weight | |
|---|---|
Shipping | 9805 lbs (narrow gauge)
4447 kg |
10180 lbs (wide gauge)
4617 kg | |
Operating | 10800 lbs
4898 kg |
Tests
Tractor Tests | |
|---|---|
NTTL 344: diesel 5-speed crawler | |
NTTL 461: diesel 5-speed crawler |
Nebraska Tractor Test 344 | |
|---|---|
Diesel 5-speed crawler
June 10 - 12, 1940
Link: Nebraska Tractor Test 344 file | |
Belt power (max) | 43.93 hp
32.8 kW |
Belt fuel use (max) | 3.0 gal/hour
11.4 l/hour |
Drawbar performance | |
Max power | 37.21 hp
27.7 kW |
Gear 2 used for power test. | |
Max pull | 9014 lbs
4088 kg |
Gear 1 used for pull test. | |
Nebraska Tractor Test 461 | |
|---|---|
Diesel 5-speed crawler
June 25 - July 10, 1951
Link: Nebraska Tractor Test 461 file | |
Belt power (max) | 46.69 hp
34.8 kW |
Belt fuel use (max) | 3.3 gal/hour
12.5 l/hour |
Drawbar performance | |
Max power | 39.50 hp
29.5 kW |
Gear 2 used for power test. | |
Max pull | 9909 lbs
4494 kg |
Gear 1 used for pull test. | |
Photos
International Harvester TD-9
Recommended Implements & Sizing Guide
Engineering recommendations for International Harvester TD-9 based on its 49.5 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 2 to 3 Bottom (14-16")2 - 3 铧 (35-40 cm) | Medium Duty | Standard utility farm tillage. |
Rotary Cutter / MowerMowing & Clearing | 6 ft (72 in)1.8 m | Medium Duty | Medium pasture clearing; rear slip-clutch recommended. |
Rotary TillerSeedbed Prep | 66 to 72 in165 - 180 cm | Medium Duty | Standard utility tiller; slip clutch protection required. |
Disc HarrowSecondary Tillage | 7 to 8 ft Tandem Disc2.1 - 2.4 m 对开双排耙 | Medium Duty | Field leveling and clod breaking behind plows. |
Hay BalerHay & Forage | Small Square Baler (14x18")小方捆打捆机 (36x46 cm) | Medium Duty | Classic 2-string baler for horse and small livestock hay. |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for International Harvester TD-9.
Estimated Continuous Field Runtime: 12 hrs
Approximately 12 hours of continuous field operation at ~75% rated power on a full tank (31 gal / 117.3 L).
Estimated 75% Load Fuel Burn~2.6 gal/hr (9.7 L/hr)
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
International Harvester TD-9 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for International Harvester TD-9.
Converted Equivalents:
Horsepower (HP)49.5 hp
Kilowatts (kW)36.9 kW
Metric Horsepower (PS / CV)50.2 PS
Direct Competitor Comparison
Compare International Harvester TD-9 against same-era industry alternatives in the same horsepower class.
Current Model
International Harvester
International Harvester TD-9
Engine Power:Diesel (listed): 49.5 hp (early) / 36.9 kW
★ Baseline Reference
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