jackshaft or driveshaft? brake caliper is on the driveshaft, there is a puller for removal of the rotor. it can be done without, but you have to be careful not to break the plastic plug
Make sure you remove the retainer on the bearing. After your sure everything is out, take a torch and heat the bearing support a little. Then I used a dead blow and gave it some persuasion from the chain case side and it came right out