The boiler barrel was rivetted and comprised two sections. The steam dome sat on top of the second section. Initially a "Hardy" vacuum brake was installed; this was later replaced by a Westinghouse compressed-air brake. The sander was hand-operated and sanded the second and third axles. The engines also had a "Latowski" steam-operated bell and, later, a steam turbo generator was fitted over the smokebox door outside the locomotive body to provide electric lighting.