in congested areas, and permit commanders to control a (c)
(d) Air cleaner.
group of motor vehicular equipments without resorting to
(e) Electrical system (starter, alternator,
less secure communication measures. FM 21-60 and TM
5-210 Illustrate and explain these signals.
(f) Safety devices.
a. Hand and arm signals can be used to prescribe
(g) Exhaust system.
direction, speed, caution, formation desired, and action
(h) Cooling system.
expected. These signals may be augmented as need
(i) Cold weather starting device.
arises, however, care must be taken to avoid confusion
(3) Fuel tank and day tank.
and to keep all concerned informed on the meaning and
(4) Instruments and controls.
use of additional signals.
(a) Cab panel instruments.
b. Flag signals are limited by the colors and
(b) Cab controls.
numbers of flags available. Green, orange and red flags
(c) Main instrument panel and controls.
are available through normal supply channels. Green
normally means everything is operational and equipment
instruments and controls.
and crew are ready for orders. Red means danger and
(5) Lighting system.
Orange usually indicates
(6) Electrical system.
equipment out of action but no help needed.
(a) AC Generator.
prearrangement, combinations of 2 or all 3 colors can be
(b) Electric governor.
used to indicate action expected or serve as a warning of
(c) Voltage regulator.
gas or chemical attack.
(d) Excitation system assembly.
c. Light signals indicating action expected or
direction of movement are used in night exercises to
(f) Circuit boards.
control the column and move individual equipment.
(g) Load connectors.
d. The use of signals is taught best by illustration,
(7) Hydraulic system.
demonstration, and application. Signal drills must be
repeated until all students are thoroughly familiar with all
signals and can recognize them instantly, demonstrate
them properly, and comply with them promptly. Signals
(when applicable), should be used throughout the course
23. Equipment Characteristics and Components. a.
(8) Brake system.
To become an efficient operator the potential operator
(9) Air system.
must have a thorough knowledge of:.
(10) Compressor and reservoir.
(1) Characteristics, basic principles and
(11) Steering System, Vehicular and/or
functions of major components concerning the equipment
to be operated.
(12) Power train:
(2) Inspections/checks and preventive
maintenance services that must be performed on the
(b) Power take-off.
equipment to be operated.
(c) Universal joints.
(3) The operator's manual pertaining to the
(d) Propeller shafts.
equipment on which the instructions are being conducted.
Prospective operators should receive
(f) Transfer case.
instructions on (but not limited to) the following as
applicable to the specific equipment on which the
(h) Wheel suspension.
instructions are being conducted.
(i) Wheel wells.
(1) Tabulated data.
(j) Filters and breathers.
(2) Engine and related accessories
(a) Lubrication system, filters and
(13) Bilge pumps.
(14) Marine drive.
(b) Fuel system (filters, strainers,
pump, Injectors, etc.).
(18) Personnel heater