2-36. OPERATION AT HIGH ALTITUDE
The locomotive is designed to operate efficiently to a height of about 8,000 feet (2 438. 4 meters).
However, because air pressure decreases with an increase in altitude, maximum available power
and engine performance decreases with increased altitudes. Keep engine air filters clean for the
least resistance to flow of intake air. Keep radiator clean for maximum dissipation of power train
2-37. RUNNING THROUGH WATER
Road bed shall be inspected prior to crossing submerged areas. Equipment
damage and injury or death to personnel could occur if road bed is damaged.
Water deeper than 3 inches (76 mm) above top of rail will cause damage to traction
motors. Never run through water that is deep enough to contact the traction motor
frames. When passing through water, proceed at a speed of between 2 to 3 mph (3
to 5 km/h).
Refer to FM 55-20, Army Rail Transport Units and Operation, for instructions for rerailing.
2-39. CUTTING OUT TRACTION MOTORS
If electrical failure occurs in a traction motor, it may be taken out of service by shutting down the
engine which generates power for that motor. Shutting down an engine cuts power to the two motors
for which that engine generates power.
2-40. TOWING LOCOMOTIVE DEAD
a. If a dead locomotive is to be towed behind a live lead unit, set the controls as follows:
(1) Place throttle handle (1) to IDLE position and reverser handle (2) to NEUTRAL position. Remove
(2) Place automatic brake valve (3) to HANDLE-OFF position and the independent brake valve (4) to
RELEASE position. Remove both handles.
(3) Place the cutoff pilot valve (5) to OUT position and set all circuit breakers and switches to OFF.
(4) Couple all brake system hoses between live and dead unit.
(5) Set dead engine valve (6) to OPEN position.