Large Scale Central

LGB track cleaning loco - voltage of the cleaning motor

Ok, I need to install a DCC decoder in my LGB Cleaning Loco. The specialized MD-Drive-SR decoder failed twice. Poor design, I don’t recommend that board. So I want to install an NCE408 decoder and I don’t want to burn out the cleaning motor. Do any of you techs know the max voltage of the cleaning motor? 12V, 18V, 24V?