(3) Electric connections poor.
(4) Reverse lever in neutral.
b. Moves very slowly.
(1) Drag too heavy. Cut off cars.
(2) Brakes not fully released.
c. Remains in low speed.
(1) The traction motor not making transition.
(2) All traction motors not operating.
d. Moves with throttle off. Throttle valve stuck open. Close by hand or open control switch
and apply brakes.
2.36. TROUBLE DEVELOPS WITH MOTOR
b. No mechanical obstruction prevents rotation. Shaft turns freely.
c. All bolts and nuts are tightened securely.
d. Correct voltage is actually available at the motor terminals. Voltage drop must not be more
than 10 percent of rated voltage.
e. Fuses are good and connections are tight.
f. The brushes make contact with the commutator and do not bind in brush holder.
g. Armature or frame is not grounded; check with a megohm-meter.