Need help-trying to remove hydraulic pump from 580sl

Didn't know if I needed to start a new thread or not. I am trying to remove the hydraulic pump form a 580sl. According to the service manual it should slide out. It's not. I've tried tapping the sides with a hammer. Separating it at the flange with a chisel and wedging a crowbar at different angles to loosen it up. I loosened the bolts on the coupler too. Any tips would be appreciated.

Need help-trying to remove hydraulic pump from 580sl