I've used a home-brewed bracket that fits over the end of the axle, with a 10-ton Porto-Power ram for a pusher. When the pin moves, it will occasionally launch itself like a rocket, so don't get very close to the axle while you're pushing on the pin. That 10-foot high pressure hose on the Porto-Power is just about the right "safe" distance for me.
Jerry
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Ignorance can be fixed; stupid is forever!