bearings

I have an MS250 and a husq 450, and I'd like to know beforehand if removing the two crank bearings is easy, hard, not worth it buy a whole new saw? And would a simple clam shell bearing separator something like this work...

Hello guy's. Date is 3-5-17. I have started building another sawmill. Have cut out the wheel well back panels and fenders, shaped and primed them. Ordered and received parts such as wheel hubs, axles, tires and wheels, acme threaded rod and nuts, a winch, flange bearings, pulley's and an 18 HP...