I have taken a Ridgid 400 power head, taken the legs off and bolted to concrete floor with anchor's and used a piece of 2" ridgid pipe thru the power head to pull with. The wire will probably not wind around the pipe so this method might require you to make short pulls and cut the wire. A wire pulling basket will come in real handy in this situation, it fits around the end of the wire. I have also taken an F250 diesel loaded with weight and pulled 750 MCM copper from existing under ground services by tying a chain to the wire and pulling it out one run at a time. Soap will not help with existing wire. Also go slow on your pulls, if you go to fast friction will cause heat and if the pull stops for some reason the insulation can actualy stick together.