This installation is for the N Scale Intermountain F7B and uses the TCS IMF4 Decoder -performed by J.M.

First remove the shell by rocking it back and forth until it slips off of the chassis. Once the shell is removed your chassis should look like the image below.

Unscrew the two screws holding the original lighting board in place and lift out the light board. Place the IMF4 back into the locomotive with the same orientation as the lighting board above. Use the two screws to attach the IMF4 to the frame and your installation should look like the image below.

Finally, replace the shell and you are ready to run your locomotive.

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