Introduction
Originally an order for Philippine National Railways, the six locomotives were purchased as by coincidence NZR needed a heavy shunter for Auckland container port transfer work. At the time two DSC class shunters were linked in tandem to perform this task. The DH class are actually a light locomotive which are geared to run at an 100kph. They were trialed on the then under-used suburban passenger network performing well but NZR focussed them on their intended purpose - heavy shunting. NZR also provided a DH unit to the Tasman Pulp and Paper mill in Kawerau to trial for sale as a heavy shunter in the mill's rail yards. The mill turned down the offer, instead purchasing a DA class locomotive to perform duties.
Read more about this topic: NZR DH Class
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