1-9. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (cont)
ENGINE RADIATORS. Two radiators, one for each engine, keep engines at proper operating temperature.
SANDBOXES AND SAND CONTROLLERS. There are four sandboxes and sand controllers, one for each front
and rear wheel. The sand controllers are mounted underneath the sandboxes and deliver a metered amount of
sand to the front or rear driving wheels. The sand controller is controlled by the sander control valve.
BATTERY CHARGING ALTERNATORS. Two 32-volt, 60-amp, internally regulated alternators, one on each
engine, provide power for charging the batteries and operating low-voltage lights and controls.
TRACTION MOTORS. Four traction motors and gear boxes are axle hung and supported on the truck transoms
by a suspension pad assembly. One motor is geared to each axle through a double gear reduction with a final
ratio of 14.96: 1.
MAIN RESERVOIR AIR TANKS. Two main reservoir tanks, to the front and rear of the fuel tank, provide a
means of storing air for the air system.
BATTERY COMPARTMENT. The battery compartment is located beneath the cab, directly beneath the
fireman's seat, and contains four batteries used for starting the engines.
FUEL TANK. The fuel tank can hold 400 gallons (1 514 liters) of diesel fuel for engine operation. Two fill pipes
and two fuel level gages, one on each side of the locomotive, provide a means of filling the tank and monitoring
the level of fuel.
ELECTRICAL EQUIPMENT CABINET. Contains the automatic switching relays and contactors and is located in
the cab of the locomotive. Both high and low voltage are present in the electrical equipment cabinet when the
locomotive is in operation.