I bought a barely used 1993 vintage Grizzly 1029 DC (6" dust port, 6" to two 4" Y connector) from a friend. The plug is 110v, and works that way but draws a lot of current. I want to convert to 220v because I have an available 220v circuit right next to the DC and the DC is on the same 110v circuit as the table saw (pops the 20A breaker when under load). The Grizzly manual shows 4 wires coming from the motor to the wiring block, but the DC has only two wires coming out of the motor housing, both yellow! The power cable from the wiring junction to the switch and the power cord both have red, black, and green wires. The red and black wires are each connected to one of the yellow wires.

What do I do now? Any advice is appreciated.

DC 1029 junction_resized.jpgDC 1029 wires from motor_resized.jpg