TM 9-2320-209-10-1 l. Steering System. When the operator turns steering wheel, the steering system sends this action to front wheels. This system functions to control direction of truck while in motion. m. Brake System. When the operator steps on service brake pedal, brake system functions to slow down or stop truck. A handbrake, when set to up position by the operator, is used for parking vehicle. n. Axles, Wheels, and Hubs. The axles support the weight of the truck and transmit power to the hubs to turn the wheels. The front and both rear axles are powered (live) axles. o. Auxiliary Equipment and Accessories. These components perform required tasks, such as pulling, lifting, earth boring, heating, towing and fording. Section II. PHYSICAL DESCRIPTION 2-3. GENERAL. Three basic wheelbase chassis are available for mounting various body types, (cargo, dump, tankers, vans, tractor, earth boring and pole setting, and pipeline construction bodies). The following paragraph will describe systems, units, and components of the various trucks. The diagrams show location of these items on the vehicle. 2-4. OVERALL EQUIPMENT PHYSICAL DESCRIPTION. a. Engine. M44A1 and M44A2 series trucks are equipped with US Army LDS 427-2, LD 465-1, and LD465-lC six-cylinder in-line, liquid-cooled. multifuel engines. The multi- fuel engine (fig. 2-2) uses the fuel injection compression ignition principle which permits the use of various grades of fuel. Refer to Table 2-6, for fuel grades to be used. 2-2