Is it a nightmare to take the boiler off a lionel tmcc engine like the sp ac9 to rebuild the smoke unit. Back with the proto 1 mth engines it was a snap to take off the boiler but never have had a tmcc engine apart. thanks for any help
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Lionel is easier. Be aware when pulling any Leoco (white plugs) do not yank the wires. Use a tool like a dental pick to start the edges loose on both sides and pull carefully.
It really depends, though the Lionel or MTH modern stuff is usually pretty easy to get into. Once in a while, a stinker will come along. 
