[Captainfab]

The way I was shown many years ago, was to drive it no with a block of wood on the balancer and a 5# hammer. I'm not saying that is the best way, as it is hard on the thrust flange of the crank. I haven't had the opportunity to install a small journal balancer for a long time, but if I were to do one now I would try heating up the balanacer some first. You don't want to get it too hot, so maybe submerge it in water and heat the water to a boil. That should expand the hub of the balancer at least some. At the same time you could try and shrink the crank snout some by tying a rag or towel to the snout with some ice cubes inside. You will still likely need to drive it on with a hammer, but the heating and cooling will certainly help some. A little oil or grease on the surface will help also.