All that you need is a bearing, gear splitter / puller as in the photo, not too expensive and tool hire shops may have kits.
I've had a kit for many years but it uses a small hydraulic ram to apply greater pressure, not a bolt and comes with several different size splitters and a collection of legs and fittings to also make up two and three legged pullers.
Simple to use.
Don't be tempted push the shaft out of the flange unless you can be 100% sure that you can replace it in exactly the same position from the end of the shaft and be 100% sure it will be square with the shaft, failure to do this could result in the shaft end float being incorrect and, or you could introduce a wobble on the flange.
