Complex sentence: During the late 1970's, NZRRS, like many other operators was having issues with the general reliability of their fleet, so orders were made to Volvo and Hino in an effort to find a better vehicle.
Split into simpler sentences: During the late 1970s, NZRRS, like many other operators, was having issues with the general reliability of their fleet. Orders were made to Volvo and Hino in an effort to find a better vehicle.