Section I. PURPOSE OF MANUAL
vehicles, these subjects have been omitted. The flow of
Usage. The manual is to be used to provide
power is traced from its development in the engine to its
basic descriptive information to the field and to service
final outlet at the wheels, with the units discussed in the
and troop schools concerning the automotive vehicle and
order in which they contribute to the power flow. Diesel
how it works. It also contains information that makes it a
and gasoline engines, except for their fuel systems, are
convenient reference manual.
explained together, as are radial and in-line engines.
contained within will be of particular interest to the
After the flow of power is traced to the wheels, those
chassis components, sometimes referred to as running
gear (i.e., steering system, brakes, wheels and tracks,
a. Automotive maintenance personnel.
and frames), are explained; then hulls and bodies; and
finally such miscellaneous items as special equipment
c. Managers and supervisors responsible for
Wheeled vehicles have been
interpreting automotive-related data.
emphasized for two reasons: first, the majority of tracked
vehicles employ special adaptation with the same
Maintenance trainers in units and schools.
fundamental principles of wheeled vehicles; second,
instruction will be facilitated by the reference to wheeled
Individuals preparing for skill qualification
vehicles because most parts are more accessible and
more visible than on tracked vehicles. Again, to aid
instruction, the military vehicle has been correlated with
Scope. This text explains the automotive
commercial vehicles that may be familiar to the student.
vehicle in general. The explanations avoid reference to
any specific vehicle or unit wherever possible. Because
existing publications cover operation and maintenance of
Section II. ORGANIZATION OF THE MANUAL
General. Many different methods are used to
Power Train. The power train includes all
group vehicle units and assemblies.
components and systems that are used to get the power
employed in this text has been chosen because it more
from the engine to the driving wheels.
readily lends itself to a logical and simplified
development of the material to be presented.
The chassis com
ponents (also known as running gear) include the
Engine. The basic engine (gasoline, diesel, and
suspension, brakes, steering, wheels, tires, and
gas turbine) is discussed later in the manual with all of its
supporting systems, such as cooling, lubrication, ignition,
fuel, and exhaust.
Bodies, Hulls, and Frames. Bodies, frames,
and hulls include the various body frame configurations,
Electrical System and Related Units. The
hull designs, trailer configurations, truck body
electrical system includes all lighting systems and
electrically operated accessory systems.