When restoration of the Groudle Glen Railway began in 1982 the locomotives were purchased from the park together with all the rails, sleepers and associated pointwork, arriving on the Isle of Man shortly thereafter.

Both locomotives were given a green livery and wooden nameplates, and until the return of Sea Lion in 1987, provided all the motive power for the line's public operations and permanent way trains.

Walrus is identifiable from her sister as she retains her false dome (actually half a gas cylinder welded to the cladding), and sports dummy side tanks; other than these visible features she is largely identical to Dolphin in all but livery.

Having carried the lighter green livery since arrival in 1983, the locomotive was withdrawn in 1989 and the wheels removed for reprofiling and major engine work.

When the line had visiting locomotives in 1998 as part of the Steam 125 event, "Walrus" needed to be stored in the open to accommodate the visitors so the wheels were replaced at this time, and a coat of battleship grey paint applied to smarten her up.

Since returning to service she has been selected for standby duties on Santa Train days, and is renamed annually as "Blitzen" for the occasion.