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MTH SD40-2 Diesel Operating Manual
QUICK START - BASIC OPERATION
The MTH SD40-2 contains state-of-the art electronics with several built-in
automatic features for incredibly realistic operation. Despite these advanced
features, the SD40-2 is easy to operate with any compatible standard AC
transformer (see the compatibility chart on page 34). All models are
equipped with an operating smoke system that should be primed with
smoke fluid before operating. Adding 20 - 25 drops of fluid through the
smoke stack should be sufficient. If you choose to not prime the units with
fluid, turn the smoke unit switch located under the trailing truck to the
OFF position. (See Figure 1) This will prevent any damage from
occurring to the smoke unit when running the engine without a primed
smoke unit. For more information see the section on page 4 on Smoke Unit
operation.
The SD40-2 model is controlled by a
ProtoSound® DCRU® electronic
reverse unit. The reverse unit operates
in the same manner that all reverse units
function by using forward, neutral and
reverse states that are entered each time
the throttle is turned on and off or by
using the transformer direction switch (if
so equipped).
The reverse unit is designed to ignore dirty track, dead spots on switches
or minor short circuits without
disrupting the engine operation,
even at slow, prototypical speeds.
Once the engine is placed on the
track, the transformer throttle can be
advanced. You will see that only the
engine’s lights come on and two dings from the sound system will chime
followed by the air compressor pump sounds. The engine does not run.
This is known as the RESET state and is explained in more detail beginning
on Page 5. The ProtoSound® DCRU® will not power the motor until the
throttle is turned OFF and then ON again. At this point, the engine will
now function just like any other electronic or mechanical E-unit.
Smoke Unit
ON/OFF Switch
Figure 1: Locating The Smoke Unit Switch
RESET
Neutral
Reverse
Neutral
Forward
Figure 2: ProtoSound® DCRU® Cycle Phases
