Refer to TM 55-207, Railway Wreck Operations (Derailment), for instructions for rerailing.
2-40. CUTTING OUT TRACTION MOTORS
If electrical failure occurs in a traction motor, it may be taken out of service by means of the motor cutout switch (MCO)
in the electrical equipment cabinet. The nameplate on the switch clearly designates the motor connections for its various
positions. Two motors are cutout together.
Move throttle handle to the IDLE position to take the load off the motors.
Set traction motor cutout switch (MCO) to cut
out the defective motor.
The load meter is connected to register the flow of current through motors 1 and 2 only. If motors 3 and 4 are
removed from service, the current flowing through
motors 1 and 2 would reach the allowable load limit when
the readings on the load meter were 600 amperes.
However; if motors 1 and 2 are removed from service,
meter readings would be zero and care should be taken
to ensure that the allowable load limit on motors 3 and 4
is not exceeded.