You need to bolt a gear puller the the four holes.
You could Fab one up out of a flat piece of metal plate and a 5/8" threaded rod ground to a point on the end that mates to the Crankshaft's end. Use long screws to hook the thing to the 4 holes as Kbietz says and tighten the nut and maybe a little heat may help (not a lot!) to expand the sleeve & break things loose..
OR--> try the candle wax method.. I've heard of this but never tried it myself (Using up one of the wife's candles does present a bit of enjoyment though!
heat it up, even a plumbers torch will usually give you enough heat. Try to heat just the pulley at the collar, then take a candle and put it to the metal and melt some wax in the area of the pulley and shaft mating surface. let it cool then try gently using a hammer or pulley puller. i had a deck off a month or so ago and the blade bolt wouldn't come out even with an impact. Tried heating, nothing, soaked with pb, nothing, heated, put the wax to it and five minutes later with the impact it zipped right off! i have used this trick to get rims off shafts, pulleys off shafts, stubborn bolts out...sounds crazy but it can work. As always, when using heat keep a fire extinguisher and/or flour handy in case of fire!:trink40: (Or get out the marshmallows!)