Begin by removing the cab roof, this is clipped in at the front and rear and can be removed using a small blade screw driver to undo the screws holding the coal bunker. To remove the coal bunker locate the two screws securing the bunker on the underside of the footplate, Separate the bunker extension located on the top of the coal bunker and then the cab and could bunker.
Note: The cab has 4 lugs and these may have to be leaver out with a small screwdriver
See photos for clarity, place the screws and bunker to one side.
With the parts separated modify the cab rear and bunker extension as shown below. A fine razor saw and file are required to complete this task. Remove the glazing before modifying the cab then mark the glazing from the cab and modify as required then reinstall with a small dot of contact cement.
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| CAB MODIFICATION - numbers are in mm Note clips that secure the cab |
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| BUNKER EXTENSION MODIFICATION - numbers are in mm |
The decoder loom is to long and we chose reduced the overall length to 25 mm - speaker wire should be 30 mm.
Note: The MRRC will modify this with you order for a small charge at time of ordering.
Seal the MRRC Micro Boost speaker by removing the moving coil pack from the supplied enclosure then applying PVA / Craft glue around the rim with a tooth pick or similar. Reinsert the speaker and allow to dry for 20 minutes. Glue the speaker onto the cab floor using some contact cement an allow to dry.
Blacken the enclosure using a Sharpie then the side of the decoder to help it hide in the cab before installation.
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| Ready for final assembly |
Solder the speaker wires onto the speaker tap - set the iron to 270 deg C for this task.
Thread the loom through the bunker and plug into the factory board as shown then rest the opposite end of the decoder onto the top side of the back head. The speaker wires were tied up with a loop of black electrical tape - get the good stuff, Nitto if you can.
TEST RUN THE LOCOMOTIVE ON ITS DEFAULT ADDRESS OF 3
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| Add a crew from Kerroby Models and the hardware will not be visible |
Clip the cab back in by engaging the front lugs and while pushing forward against them push down carefully to engage the rear lugs.
Install the bunker extension by re-engaging the pins into the coal bunker - if damaged a wipe of contact will secure the frame to the coal bunker.
This should work with the lighted engine also.
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Refer to blog on installing a Soundtraxx decoder into a lighted 30 Class for additional information
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