In addition, she received new boilers as well as new main and cruising steam turbines.

During that period she underwent a major refit, receiving new boilers and engine.

The entire class received upgraded boilers and front ends from the late 1930s onwards and was reclassified as the 600C class.

She also received new boilers and then returned to service.

She received new boilers and four turbines with a maximum output of 60,000 HP rendering a maximum speed of 26 knots.

Under new management, some "Tinies" were sent to Darlington Works where they received domed boilers.

In 1885, Snaefell received new boilers at a cost of £8,512.

The ship also received eight 57-millimeter guns and new boilers.

The two earliest classes never received larger boilers, though between 1884 and 1891 the "1312"s received enlarged cylinders of 18 in x 22 in.

Seven locomotives received larger boilers between 1881 and 1896, and the others were withdrawn between 1897 and 1900.