 Both locomotives were withdrawn on closure of the Greytown Branch; WF 400 in December 1955, while WF 398 remained in service for several months primarily to run the demolition trains and during which time it moved the Greytown station building to Woodside Junction to become the new goods shed there.In 1909, trials were conducted with WF 436 to see if a solution could be found to reducing the amount of smoke produced by engines passing through the Lyttelton Tunnel.436 was briefly converted to oil-firing for this purpose, but although the tests were satisfactory, oil was at that time three times more expensive than coal, and so WF 436 was reconverted to coal firing.