It should be noted that locomotives required more repairs in the early days of the railway engines as this was an emerging technology.

It is thought this locomotive will require a replacement engine to be able to turn a wheel again.

During its time there the locomotive required its own driver as it lacked multiple-unit equipment.

By 1987 the locomotive required another overhaul, which was started in the early 1990s.

The locomotives originally required two men to operate, but were modified in service to allow for one man operation.

In the old days, only locomotives required intensive care.

Contractor's locomotives were usually saddle or well tank types (see above) but required several adaptations to make them suitable for their task.

The locomotive required no turntable and could be reversed for service in the opposite direction in a matter of seconds.

Trouble-free locomotive running requires that there is sufficient traction between wheel and rail.

Because locomotives required the route to be flat, at no point in the trail does the grade exceed 2%.