[Herb Concord Ca]

Best to try using the insulated brushes as is. You need a micro torch or a high wattage iron to remove and replace them. Clean the 4 brushes and brush holders with solvent, use a curved pick to pull the brush springs out of the holder and move to the side, insert brushes, make sure they move freely in the holders. move the springs back on the brushes, don't pinch the wires. Oil the bushings and you should be good to go.