Board Thread:Warhammer 40k General Discussion/@comment-72.240.130.242-20130618172401/@comment-2001:E68:543C:1087:6158:CC11:AE18:C204-20190124142907

They do take apart larger titans that can't fit through tunnels. This was stated in Master of Mankind where the Mechanicum were raging because they couldn't take apart and bring a Reaver-class Titan back in time for the retreat because it couldn't fit through the Webway tunnels.