G'day folks,
There's a description of the procedure in this Repair Manual excerpt;
https://www.outdoorking-forum.com.au/pages/V...icta%20Workshop%20%20Engine%20Manual.pdf - pages 9-10.
Victa used to offer the crankshaft jig pictured, but the job can be done without it. It's just more time-consuming; the Victa crankpin doesn't have locating shoulders.
Victa suggest that a screw press could be used, so any 5 tonne or above hydraulic press would do the trick.