1-9. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (cont)
DIESEL ENGINE. The diesel-engine is an eight-cylinder, turbocharged, water-cooled, four-cycle, V-type engine
used to provide power. It is directly connected to the main generator.
ENGINE RADIATOR. The radiator keeps engine at proper operating temperature between 100 and 198°F (38
TRACTION MOTORS. The traction motors are axle hung and supported on the truck transoms by spring-loaded
suspension. One motor is geared to each axle through a single set of gears with a ratio of 14:72.
BATTERY BOX. Two externally mounted battery boxes, one on each side of the locomotive, provide ventilated
compartments to house the eight batteries.
MAIN RESERVOIR AIR TANK. Two main reservoir tanks, one on each side of the locomotive, provide a means
of storing air for the air system.
SANDBOX AND SAND CONTROLLER. There are eight sandboxes and sand controllers, one for each wheel.
The sand controllers are mounted underneath the sandboxes and deliver a metered amount of sand to the
driving wheels. The sand controller is controlled by the sander control valve.
MAIN GENERATOR. The main generator furnishes direct-current power over a wide range of voltage at various
speeds up to 1200 rpm. It is separately excited by the exciter generator mounted on the generator frame. The
generator also acts as a starting motor when the start button is pushed and the battery switch is closed.
FUEL TANK. The fuel tank can hold 500 gallons (1892 liters) of diesel fuel for engine operation. Two fill pipes
and two sight glasses, one on each side of the locomotive, provide a means of filling the tank and monitoring the
level of fuel.
TRACTION MOTOR BLOWER. The blower provides forced ventilation for the traction motors which require
adequate cooling. It is belt driven from the main generator shaft.
MASTER CONTROLLER. The master controller contains the throttle, reverser, brake controls, and other
controls and indicators used by operator to operate and monitor the locomotive and is located in the cab of the
ELECTRICAL EQUIPMENT CABINET. The 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.