Locking Your Locomotive Into A Single Direction - Lionel SD90MAC Owner's Manual

Conventional transformer operations

Locking your locomotive into a single direction

W
hen the Command reverse unit switch is in the RUN position on the powered unit, your loco-
motive sequences through a repeating pattern of operations: forward, neutral, reverse, neutral,
and so on.
To "lock" your locomotive into a single direction (for example, to operate in forward
only), you can deactivate the Command reverse unit's sequencing function.
1. Use your transformer's DIRECTION button or interruptions in track power
to get your locomotive moving slowly in the desired direction or into
neutral.
2. Slide the Command reverse unit switch on the powered unit to the PGM
position. At this point, the locomotive is "locked" into your chosen
direction. See Figure 4 on page 8 for the location of this switch.
To restore the forward-neutral-reverse sequence, just slide the Command reverse unit
switch back to the RUN position.
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