All testing instructions and installation details were followed as per the Digitrax manual.

NOTE: THIS ISTALLATION MAY VOID SOME OR ALL OF YOUR WARRANTY

Disassembly

1. Remove four screws holding fuel tank
2. Remove 6 large screws and 2 small in bottom to remove top.

I then checked the trucks for wire connections
 

	Red Wire	Black Wire	Yellow Wire	Green Wire	Blue Wire
Front Truck	Left Track	Right Track	Motor -	Motor +	No Con
Rear Truck	Left Track	Right Track	Motor +	Motor -	No Con

When doing the above test I found the right slider was not working which was caused by the brass bearing had loosened from the metal plate which was just a pressure fit so I soldiered it.

With the above data gained I selected the DG580L as it was in the range of this engine.

Since I wanted to have the smoke on the 1 amp circuit F-3 brown wire, I removed the smoke board and added a diode across the + and - as per the Digitrax manual. See photo below.

I removed all of the other boards including the one in the front with the switches on it since they are no longer required. (The board for the smoke was left in tack with the diode added as per above).

USA has some neat little plugs so I removed all these from the boards so I could reuse them later.

I made a board 1" X 2 1/4 " from some of the perforated material to fit in where the small front boar above the trucks was removed from.

I mounted a three prong male plug and a two prong male plug on it.

I drilled two holes so it would mount where the original board had been.

This board is just for the use of the lights.
 

To the left side of the front weight I installed the decoder with one metal screw, and to the right side I installed the Dallee soundboard. It was first mounted on a piece of plastic to support the board and then double-sided tape to the weight. I only used the Dallee soundboard as I had some to use up. I found they do not have the required volume for outside.
 
 

Note when installing the soundboard and the decoder please ensure they are not too far forward so you cannot get the hood back on.

I next plugged the motor plugs back in to the sockets, that I had removed from the original boards, together (yellow and green wires and wired them to the orange and gray on the decoder. The wires were shortened to make a neat job and I left the plugs in the circuit so I could remove the trucks if needed. NOTE THE WIRE COLOUR CHANGE.

To complete the installation

I ran the decoder F-1 wire (green) to the sound board for the bell and F-2 wire (violet) to the sound board for the horn.

I ran the F-3 wire brown to the other side of the smoke board.

I connected the cab light F-4 (white & yellow) and the rear light (yellow) to a 3-prong female plug and connected it to the plug on the small board I had made earlier. The lights from the cab were actually a different colour but I basically used the center prong as the common, blue.

I made up a 2 prong female plug for the front headlight to go to the two prong plug on the board.

The above shows some of the plugs and the heat sink for the smoke which are mounted to the rear weight.

I used a two-inch speaker in the roof and a two and one half inch speaker in the fuel tank. I wired them in parallel (which is not correct) to get an expectable volume level. This is the second NW 2, I have done so the speaker error has not yet caused a problem on the first one after, 6 months.

I installed the rear cab and tested the unit with the front hood lying beside the unit.

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