[Ed in Maine]

I have experienced this problem also. The shoes are binding up in a groove worn in the brake drum. Put the transmission in neutral. It may help to jack up both rear wheels. Put the puller on the drum and lightly load the puller against the axle shaft. Put a lug nut on one of the studs to protect the threads. Use a large screw driver or other lug wrench under the lug nut and over the outer portion of the drum and rotate the drum. The drum should move off the shoes with a light pulling pressure and with the rotation. Good luck, Ed