M6 Tractor

M6 Tractor
Country	USA
Role	Artillery tractor
Produced	February 1944-August 1945
No. built	1,235

The M6 High-Speed Tractor was an artillery tractor used by the US Army during World War II. Manufactured by Allis-Chalmers, it was used to tow heavy artillery pieces, such as the 8-inch Gun M1 and 240 mm howitzer M1. Its G-number was (G-184)

Source: M6 Tractor on Wikipedia

Higth Speed Tractor M6 Walk Around
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High Speed Tractor M6 (38-Ton Heavy Artillery Prime Mover)

General Characteristics

The M6 High Speed Tractor was a fully tracked prime mover developed by the US Army during World War II. It was the heaviest of the “High Speed Tractor” series, specifically designed to tow the largest and heaviest field artillery pieces, such as the 8-inch Gun M1 and the 240 mm Howitzer M1.

Property	Value
Role	Heavy Artillery Prime Mover
Manufacturer	Allis-Chalmers
Entered Service	February 1944
Crew	11 (Driver plus 10 artillery crew)
Mass (Combat Weight)	34,500 kg (76,000 lb)
Length	6.55 m (21 ft 6 in)
Width	3.05 m (10 ft 0 in)
Units Built	1,235

Powerplant and Mobility

Engines: Two Waukesha 145GZ 6-cylinder in-line gasoline engines.
Power Output: 2 x 190 hp (380 hp net total) at 2,100 rpm. The M6 used two engines and a common transmission (unlike the single-engine M4 tractor).
Suspension: Utilized the Horizontal Volute Spring Suspension (HVSS) system, similar to the M4 Sherman tank. It featured six rubber-rimmed road wheels per side.
Transmission: Selective constant mesh, 2 ranges forward, 1 reverse (providing 10 speeds total via the transfer case).
Maximum Speed: 34 km/h (21 mph).
Operational Range: Approximately 180 km (110 mi) on roads.

Armament and Towing Capacity

Main Towing Load: Intended for artillery loads between 13,600 kg and 27,200 kg (30,000–60,000 lb).
Weapons Towed: Primarily towed the 240 mm Howitzer M1 and the 8-inch Gun M1. (The 240 mm Howitzer had to be broken down into two loads for transport).
Winch: Equipped with a large capacity Gar Wood winch (rated for 27,200 kg / 60,000 lb pull) for self-recovery and handling heavy artillery pieces.
Ammunition Capacity: Carried specialized compartments in the rear cargo box for the crew, equipment, and ammunition (e.g., typically 14 rounds for the 8-inch or 240 mm guns).
Defensive Armament: One .50 caliber (12.7 mm) M2 Heavy Barrel machine gun on a flexible ring mount for anti-aircraft and local defense.