This installation is for a HO-Scale Walthers Life Like EMD E8A using a TCS WOW121-Diesel Decoder, AK-MB1 Motherboard with built in Keep Alive™
and 32mm WOWSpeaker by TCS.

Kit Coming Soon! We are in the process of assembling all the items shown here into a new WOWKit.
Please check back here to see the new WOWKit when it arrives.

Important Soldering Tip:
Please do not use any flux either liquid or paste on the mother board. It will damage it. Use only Rosin core solder approved for electronics use.
We recommend to use only Kester "44" rosin core, SN63PB37, .015" diameter, part number 24-6337-0007.
This can be ordered from Techni-Tool under Techni-Tool part number 488SO157


The Walthers Life Like EMD E8A with its shell on. To remove the shell, gently pull outwards along each side and lift the shell off of the frame being
careful with the couplers.

Walthers Life Like EMD E8A with the shell off.

Remove the two screws highlighted above in red and this original board and discard. At the same time, remove the two screws highlighted above in blue and set the aside for later use.

Next, remove the eight screws highlighted above in red from the original lighting board. Clip off the connectors on the wires and discard them and the board.

Show with the original lighting board removed.

Remove the two screws highlighted in red above from the lighting board support that still is on the frame. Discard this piece and these screws.

Finally, remove the two screws highlighted above in red and lift out the cab interior. Save this and these screws for reinstallation.
Remove the plastic floor platform from the top of the frame to get access to the speakers. Remove these speakers from the frame and discard
them as we will not be reusing them for this installation.

The original speaker will have a rubber gasket underneath. Save this gasket for the WOWSpeaker installation.

Shown with the platform and speakers removed. Trim, tin or lengthen the wire leads as necessary.

Install the new WOWSound 32mm speaker into the frame, utilizing the original gasket underneath to seal and insulate it against the frame.

Solder the motor track and speaker leads to the AK-MB1 motherboard according to the included wiring diagram.

In this installation, we found it necessary to add length to the front lighting leads. Shown above are these wires which have been splice in and insulated
with TCS part #1320 Black 3/64" heat shrink tubing. Solder these lighting leads to the AK-MB1 motherboard according to the included wiring diagram.
You can now plug in your WOW121 decoder.

We have found that LED light output is brightest when shinning directly into the end of the light tube, but in some circumstances they may be placed along the length
of the tube as well with satisfactory results. In doing so, white light LED output would be least affected, while non white LED output will be more affected by placement.

Lastly, in order to keep the wires neat and prevent possible shorts, lace the wires into a bundle using lacing cord, which is a wax impregnated string 
used for wire bundling and making harnesses. There are many choices of lacing cord available from Digikey
We use part number 802534B BK032-ND

Now you can close up the locomotive and reinstall the coupler assemblies. Be sure to be mindful of wire routing and reassembly of the shell as to not damage 
or foul the installation. Your Walthers Life Like EMD E8A is now WOWSound equipped and ready to roll!

Other solder tips: When stripping wire, only strip a tiny little bit of the insulation. Strip no more then a 1/64 of an inch. When the wire gets tinned with solder the insulation will shrink back more. Try to not expose any more wire then half the length of the solder pad at most. In no case should solder or exposed wire wire ever be outside the boundary of the the solder pad you are attaching a wire to.
Click here for important information on properly Stripping and Tinning wire

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