I have a 675 which seems to have its insides packed with old SP tablets. Will the new MegaSteam cleaning product help with removing the impacted white material remains of the smoke tablets?
Original Post
No.
You need to take it apart and clean off the residue. The problem with pellets is that they are solid at room temperature, then melt to liquid and finally to vapor as they heat.
When the hot liquid leaks and runs down into the puffer piston, it solidifies. Once it is no longer near the source of heat, it solidifies, and stays solid.
The only cure is to have someone open up the puffer and clean it out, along with the air hole in the reservoir. Nothing you put down the stack with reach the solidified pellets, nor will it melt them.
If the puffer [piston and the air hole are still working, then just run the loco until you have used up the pellet residue, and then use a few drops of liquid smoke fluid instead.
