This installation of TCS DP5 Decoder is for HO Scale Rivarossi 2-6-6-6 Allegheny and was performed by A.G.
The locomotive showed up here as a courtesy of Bill Meyer, PA.
The three upper pictures show the beautiful and very well made Rivarossi 2-6-6-6 Allegheny with its shell on, prior to the TCS DP5 Decoder Installation. The locomotive uses three functions:
head light, reverse light and the flicker box light.
Here is the close-up picture of the locomotives's top. The plastic part that is marked in red will come off and there will be a phillips screw underneath that needs to be removed as well. Be very careful working on this very detailed locomotive as it has many details are are very easy to brake.
Here is another close-up picture of the stack where you can clearly see the phillips screw.
Using a phillips screw driver, remove the screw inside the stack.
VERY GENTLY remove the air hose assembly. Use a small size, flat end screwdriver.
Gently remove the piping from the air tank and lift the front of the boiler upward to disengage the wire braces that holds it to the frame.
Here is the picture of the air line assembly that is partially removed.
WITH A GREAT CAUTION pull the whole boiler assembly out to the front exactly as shown in the picture above.
Gently lift the plastic boiler cover up.
This picture illustrates the locomotive where you can clearly see the original light board with 8-PIN NMRA plug. Great - the engine is DCC ready!
Here is a close-up of the 8 Pin NMRA Plug.
Remove the DCC plug. The picture above shows you the pin scheme of the socket. Pin #1 is marked in red.
Insert TCS DP5. Make sure the Pin#1 of the decoder is lined up with the Pin#1 of the NMRA socket. For more details about the DP5 Pin layout, see the manual that came with the decoder.
Reverse these steps to reattach the parts.