Speed Control; Locking Locomotive Into A Direction - Rail King Ready-To-Run SD70ACe Diesel Set Operation Manual

Speed Control

M.T.H. engines equipped with Proto-Sound 3.0 have speed control capabilities that allow
the engine to maintain a constant speed up and down grades and around curves, much like
an automobile cruise control. You can add or drop cars on the run, and the engine will
maintain the speed you set.
While the engine is programmed to start with the speed control feature activated, you can
opt to turn it off. This means the engine's speed will fall as it labors up a hill and increase
as it travels downward. It is also affected by the addition or releasing of cars while on the
run. Because the engine will run more slowly at a given throttle voltage when speed
control is on than when it is off, you should adjust the throttle to a lower power level for
operation with speed control off to avoid high-speed derailments. When speed control is
off, the volume will drop to allow for better low voltage operation.
To turn speed control on and off, put the engine in neutral, then quickly tap the
transformer's Horn button one time then quickly tap the Bell button two times, allowing
approximately ½ second to lapse between each quick button press. Two horn blasts will
indicate that the engine has made the change. Repeat the 1 horn, 2 bells code to return it
to the other condition. You will want to do this during the initial neutral upon start-up if
you ever couple this engine to another engine that is not equipped with speed control to
avoid damaging the motors in either engine. Each time you shut down the engine
completely, it will automatically turn speed control on.

Locking Locomotive Into A Direction

You can lock your engine into a direction (forward, neutral, or reverse) so that it will
not change directions. To do this, put the engine into the direction you want (or into
neutral to lock it into neutral), run it at a very slow crawl (as slowly as it will move
without halting), and quickly but firmly tap the Horn button once followed by three
quick taps of the Bell button, allowing approximately ½ second to lapse between each
quick button press. Two horn blasts will indicate that the engine has made the change.
The engine will not change direction (including going into neutral) until you repeat the
1 horn, 3 bells code to return the engine to its normal condition, even if the engine is
kept without power for extended periods of time.
Place
Engine into
Horn
Desired
Direction
RailKing® SD70ACe Diesel Ready-To-Run Set w/Proto-Sound® 3.0
Place
Horn
Engine into
Neutral
Horn Bell
=
Bell Bell
=
Bell Bell
™
17
Speed Control
Two Horn Blasts
(indicates change is made)
Repeat to Return
to Normal Condition
Direction Lock
Two Horn Blasts
(indicates change is made)
Repeat to Return
to Normal Condition