Bachmann EMD GP40 - Smoke Unit

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ELECTRONICS, SMOKE/EXHAUST STACK PANEL SWITCHES
Your GP40 locomotive features totally isolated electronics, which allow for easy installation of the control system of your choice
(see your hobby retailer for available options). Switches for toggling control options are found under the smoke/exhaust stack
panel along the roof of the locomotive. There are ve switches under the Smoke/Exhaust Stack Panel. To access these
switches, remove the panel by lifting it from each end. The switches are labeled as follows:
1. Lights: This switch controls the headlights, ditch lights, cab light, and number board lights. When set to ON these lights are
controlled by the device plugged into the plug-and-play circuit board. When set to OFF all of these lights will be turned off.
2. Smoke: This switch controls the operation of the smoke unit. When set to ON the smoke unit is controlled by the device
plugged into the plug-and-play circuit board. When set to OFF the smoke unit is off and will not function. Please ensure that
smoke uid has been added to the smoke unit before turning this switch on.
3. Battery/Track Pickup Switch: In the TRACK position, power is fed from the track to the electronics inside the locomotive.
In the BATTERY position, all track connections are removed and power is fed either through the two screw terminals labeled
INPUT BATT1 on the rear of the main circuit board or through the front or rear power plugs if your battery is located in a
separate trailing car.
4. NMRA/Large Scale Polarity Switch: In Large Scale, there are two conventions used to control the direction of the
locomotive. For left rail positive control (most common), move the polarity switch to the LARGE SCALE position. For right rail
positive control, move the polarity switch to the NMRA position. If your locomotive operates in the reverse direction to other
locomotives on your layout, place the polarity switch in the opposite position. The polarity switch is also active in battery mode
to allow for a control unit to be placed in a trailing car. Please see the Adding Aftermarket On-Board Battery/RC Operation
section for more information.
5. Motor Switch: This switch controls the motor. When set to OFF the locomotive will not move, but other features, such as
smoke or lighting, will continue to function while power is supplied, providing these functions have been switched to ON.
SMOKE UNIT
The Bachmann GP40 comes with a fan-assisted smoke unit that has two parts; the smoke unit
and the electronics that control the smoke unit.
To achieve the smoke effect you must add smoke uid in the smoke unit cavity (the exhaust
stack) and turn the smoke switch on. Do not overll. We recommend using Bachmann #00251
Smoke Fluid, however, any brand of model railroading smoke uid designed for use with Large
Scale models will work.
The smoke unit is designed to protect itself from overheating. After running for a while, it
will shut off for some time and then restart itself. The air temperature that the locomotive is
operating in affects the length of time between shut-offs. The hotter the air temperature, the more frequently the smoke unit
will shut down to protect itself. The locomotive will not be affected during these shut-offs and will continue to run normally.
Note: after adding smoke uid to the locomotive, make sure to store your model in an upright position to avoid the uid
spilling on the locomotive surfaces.