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7865 Motor Replacement Unit for Battery or Motor-Less Trains 12V is a Trains set released in 1980.
The motor module was manufactured by Bühler Motor on behalf of Lego.
Description[]
The unit incorporates six wheels, with the four outboard wheels being driven by the motor through a worm wheel drive. Power is collected from the conductor rails through spring loaded copper pick-up shoes - two at either end to allow the train to negotiate points without power interruption.
A power-take off socket exists at both ends to allow the unit to power on-train lights.
Mechanical Issues[]
After heavy use, the nylon worm gear inside the motor can wear out.
Gallery[]
Leaflet about the 12V to 9V transition presenting the 12V sets still available in Switzerland between 1991 and 1993. Included are 19 pieces.
