4 ENGINE RADIATOR. The radiator keeps engine at proper operating temperature between 100 and 1980F (37.7 and
5 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.
6 BATTERY BOX. Two externally mounted battery boxes, one on each side of the locomotive, provide ventilated
compartments to house the eight batteries.
7 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.
8 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.
9 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.
10 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
11 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.
12 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 locomotive.
13 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.
1-10. DIFFERENCES BETWEEN MODELS
This manual covers 60-ton, diesel-electric locomotives. Minor differences may exist in components and component
location and in the electrical conduit and air piping layouts. There are no known differences between locomotives.
1-11. PRINCIPLES OF OPERATION
Refer to TM 55-2210-223-12 for principles of operation.