Complex sentence: A 1940s steam hauler, used to transport logs through the forest for milling and a 2-tonne Caterpillar tractor is still present in the reserve; it was used in the 1950s to destroy many totara posts.
Split into simpler sentences: A 1940s steam hauler, used to transport logs through the forest for milling and a 2-tonne Caterpillar tractor is still present in the reserve. The tractor was used in the 1950s to destroy many totara posts.