 They were used on suburban service in and around Hobart and also for shunting and short-haul freight work.However, the locomotives were not particularly successful as the TGR used soft coal, on which the WF class were known to be reluctant steamers.Certain engines also suffered from reliability concerns, which later led to trial modifications made to DS 7 (WF 434) by shortening the smokebox by 520mm and fitting a narrower 'Master Mechanics' funnel.