[1] They were fitted additional equipment for their duties, including extra weight for traction, "manual power control" to allow low speed operation, and an accurate low speed speedometer.

The H class were delivered as T413 to T417, but were reclassified before entering service.

[2][3][4] Pacific National sold three of the H class to the Ettamogah Rail Hub in 2015.

H4 was scrapped in 2020, while H1 had had its long hood cladding removed and was stored in North Dynon between 2020 and April 2022, when it was transferred to the Seymour Railway Heritage Centre as part of a long-term restoration project.

In mid-2023, all four of the surviving H classes were bought by Watco Australia, and are currently being refurbished at Newport Workshops.