Complex sentence: The locomotives, numbered in the range from F123-0100 to F123-0600, were painted in a dark blue livery with yellow sills and handrails and replaced ten older locomotives which were hired from Transnet and used in pairs for loading operations.
Split into simpler sentences: The locomotives, numbered in the range from F123-0100 to F123-0600, were painted in a dark blue livery with yellow sills and handrails. They replaced ten older locomotives which were hired from Transnet and used in pairs for loading operations.