Oppsee, my bad. - not needed to split case but notice that cover has threaded holes in it? Thread two bolts in and gently and evenly apply torque to each a little at a time. Do not bind it by c0cking it... It will act as a puller, extracting the housing.....
If you really feel ALL of the bolts are out, use a block of wood and hammer (heavy mass) pop the case off. Make sure all the bolts are out!