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Technical Manual, U.S. War Department, September 1, 1943
[DISCLAIMER: The following text and illustrations are taken from a WWII U.S. War Department
Technical Manual. As with all wartime manuals, the text may be incomplete or inaccurate. No attempt has been made to
update or correct the contents of the original technical manual. Any views or opinions expressed do not necessarily
represent those of the website.]
CAR, HALF-TRACK, M9A1
Technical Manuals: TM 9-707, TM 9-1707A
Parts List: SNL G-147
Manufacturer: International Harvester Co.
Armament: One Gun, machine, cal. .50, M2; one Gun, machine, cal. .30, 1919A4; one Gun, submachine, cal. .45.
Ammunition: 7,750 rounds, cal. .30; 700 rounds, cal. .50; 540 rounds, cal. .45; 10 hand grenades; 14 Mines AT, HE, M1 w/fuze.
![[Car, Half-Track, M9A1]](pics/m9-a1-halftrack.jpg "Car, Half-Track, M9A1") |
| RA PD 308922 |
Classification: Substitute standard
Purpose: Used to transport cargo and personnel in combat zone.
![[U.S. WW2 Half-Track, M9A1 Dimensions Diagram]](pics/m9a1-halftrain-silhouette.jpg "U.S. WW2 Half-Track, M9A1 Dimensions Diagram") |
| GENERAL DATA | |||
| Crew | 10 | ||
| Weight | Payload—w/ winch | (lb) | 3,000 |
| Payload—w/o winch | (lb) | 3,500 | |
| Gross | (lb) | 19,050 | |
| Shipping dimensions | w/winch (cu ft) | (sq ft) | |
| w/o winch (cu ft) | (sq ft) | ||
| Tires—Combat | Ply 12 | Size 9.00 x 20 | |
| Tread, center to center | Front | (in.) | 66 1/2 |
| Track width | (in.) | 12 1/4 | |
| Ground clearance | (in.) | 11 3/16 | |
| Ground pressure, tires | (lbs per sq in.) | ||
| Electrical system | (volts) | 12 | |
| Capacities | Fuel, 80 octane gasoline | (gal) | 60 |
| Cooling system | (qt) | 31 | |
| Crankcase (refill) | (qt) | 10 1/2 | |
| Brakes | Hydraulic (Hydrovac) | ||
| Communication | Radio | ||
| PERFORMANCE | |||
| Maximum gradability | (percent) | 60 | |
| Turning radius (ft) | Right 28 | Left 30 | |
| Fording depth | (in.) | 32 | |
| Maximum vertical obstacle vehicle will climb | (in.) | 12 | |
| Angle of approach (deg) | w/ winch 36 | w/o winch 40 | |
| Angle of departure | (deg) | 32 | |
| Fuel consumption, average conditions | (miles per gal) | 3.6 | |
| Cruising range, average conditions | (miles) | 220 | |
| Maximum allowable speed | (mph) | 42 | |
| Number of speeds forward | 4 | ||
| ENGINE | |||
| Manufacturer | IHC | Model Red-450B | |
| Type | In-line, 4 cycle | Number of cylinders | 6 |
| Displacement | (cu in.) | 451 | |
| Governed speed | (rpm) | 2,600 | |
| Brake horsepower | 141 | ||
| Ignition type | Battery | ||
| ADDITIONAL DATA | |||
| Winch capacity | (lb) | 10,000 | |
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