My daughter saved up and bought the Lego 4841 set and kept pestering me to motorize it so that it could be run alongside our other PF remote control trains (Maersk, cargo, passenger, emerald night etc). Argos had an offer on the Lego 7938 passenger train set so I got that for the motorizing parts - motor bogie, IR receiver and battery box. I tried to make the conversion as simple as possible so it would be easy to convert back to its original state
Firstly, the tender. The original tender is a perfect size for the PF battery box. The conversion mainly consisted of stripping out the interior & putting new black edging around the top instead of the black door surround. Just need to finish it off with some small black bricks to represent coal.
The motor bogie was simply clipped into the engine in place of the original rear bogie/truck. I decided to route the cable up through one of the holes in the centre of the base plate which meant I had to remove a red plate which was originally above the hole. The cable was then threaded through into the cab.
The final set was to find a home for the IR receiver. It is positioned in the cab, raised up so that the top grey part of the receiver is level with the top of the cab sides. I had to strip out the original cab interior to make room & a new roof was necessary with a hole in to allow the IR detector part to be exposed. Finally the excess wiring was tucked in the space under the raised receiver. Although the receiver is a little low it still works well and semms to resond better than the yellow cargo train engine which often seems to ignore speed change commands.
More updates soon - the start of the Docks and how work is progressing on other goods facilities
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