8
MTH E-8 Operating Manual
sound of the air lines coming apart. It can best be described as a CHA-
CHUSHHH sound. The coupler doesn’t’t have to be fired in NEUTRAL.
Once the coupler is armed it can be fired in Forward, Neutral or Reverse.
However, you may find that the
coupler doesn’t’t open when
firing the coupler at high
speeds. Reduce the voltage
setting on your transformer if
this occurs and run your engine
at a slower speed before firing
the coupler. If the coupler
continues to open erratically, try
lubricating the knuckle with
light oil as indicated in Fig. 3.
For multiple heading purposes, only one of the two Proto-Couplers will
function at any one time. Use the coupler direction switch as shown in Fig.
1 on page 3 to select either the front or rear coupler. Simply slide the
switch toward the direction of the coupler you want to make active.
NEUTRAL-ACTIVATED CAB CHATTER SOUNDS
Your engine is equipped with four dispatacher-to-engineer “Cab Chatter”
radio transmissions that occur every 2 to 30 seconds. Each sequence will
play at random intervals to eliminate repetition. While the sounds are
selected to play randomly by the microprocessor, there is no guarantee that
you won’t hear the same message repeated twice or more times.
SQUEAKING BRAKE SOUNDS
ProtoSound equipped engines feature the ability to play the sound of
squeaking brakes whenever your engine slows in speed. There are two
settings for activating the squeaking brake sounds. The default setting
allows the brake sounds to play while the engine is in forward or reverse
and the transformer throttle is lowered from a high setting to a low setting
(14 volts to 8 volts or less). The second setting requires that a bell button be
used to “arm” the brake feature
and is explained in more detail in
the “Activating Freight Yard
Sounds” section found later in
this manual. The sound itself is
a stored record on the
Lubricate
Coupler
Knuckle
Figure 3: Lubricating The ProtoCoupler Knuckle
Squeeek
Throttle Down From
High Voltage To Low
Listen For The
Squeaking Brake Sounds
