I've been out of trains for a very long time, so I may be wrong on this...
Didn't some of the early turbines have the larger lightbulb with the depression in it to use as the heater element for smoke? The smoke pellet, when dropped in the smokestack, would actually rest on the bulb, in the depression. The heat would melt the pellet and you had your smoke.
For this bulb, once you removed the boiler front, there should be a grey metal housing with two fingers/tabs/***/whatever you want to call 'em protruding from the front. Put your fingers on these tabs and turn the housing a bit counterclockwise (think mouseball retainer cover for us old farts that still have balls in their computer pointers). The housing and bulb can then be withdrawn from the front of the boiler.
Sorry; don't know the part number, but I've seen 'em at train shows.
To replace the bulb, pull the boiler front straight out of the boiler. Next, pop the bulb and socket out of the spring clip on the back of the boiler front. Unscrew the bulb . The bulb part number is 1447 and most Lionel parts dealers stock it. After you screw in the new bulb, snap the socket back into the clip then push the boiler front back into the boiler.
Jim
Our community is FREE to join. To participate you must either login or register for an account.
Get the Classic Toy Trains newsletter delivered to your inbox twice a month