12-03-2015, 03:08 AM
Do you mean the frames of the trucks? There are two choices
a. There is often a brass rivet that is easier to solder
b. Clean the frame with a brass brush and solder with flux at the rim.
You should disassemble the truck in any case and use a powerful solder iron to get the heat to the frame to tin it. Than get solder on the wire and finally solder the wire to the frame.
But it will not be a beautiful solder job. The truck frames are made of iron but not really steel.
a. There is often a brass rivet that is easier to solder
b. Clean the frame with a brass brush and solder with flux at the rim.
You should disassemble the truck in any case and use a powerful solder iron to get the heat to the frame to tin it. Than get solder on the wire and finally solder the wire to the frame.
But it will not be a beautiful solder job. The truck frames are made of iron but not really steel.
Reinhard