I had the need to remove a heavy cast iron flywheel off of a 4 horse DC motor and the screw type gear pullers weren't cutting it. I bought this puller after reading some reviews. It removed the flywheel effortlessly. No idea how close to 15 tons of force it generated but with every stroke of the handle it moved about 1/16\". At one point, I did have to stack a couple of hex nuts inside the bore of the flywheel because the cone shaped pusher was not deep enough but that is to be expected with any puller. I will say this: the other reviewers are not kidding about the weight :) It can be awkward to set up the three arms, then screw the hydraulic ram into the yoke while keeping everything in place. To help with that, really tighten up all the bolts so that the three arms are held in place and not flopping around. The power of the hydraulics will easily overcome the friction from the bolts. No need to worry about that. Just have it tight enough so that gravity does not cause everything to fall out of place as you're setting it all up. Also, even though the yoke can be used with two opposing arms, unless the pushing cone is EXACTLY lined up with the notch in the shaft, it will bend to one side as you work the hydraulics, just like with a screw type puller I am 100% pleased with this. Zero regrets. Even if I only use it once a year, just knowing that it is vastly capable of pulling anything off of anything, makes it worth the $70 :D
Raph 
