J-550 Class Locomotive is renowned as a workhorse of its era, showcasing engineering excellence. It served as a pilot locomotive in Bendigo until its withdrawal from service in 1972. In 1974, it was moved to Mirboo North for static preservation, with the oil tank removed. Acquired by Steamrail Victoria in 1985 for spare parts, J-550 had its boiler cladding stripped and asbestos lagging removed. Key components were salvaged for Steamrail’s K-class fleet. Following a deal for exchange, the locomotive was in Warragul until 2013 when it moved to Noojee. During this time, valve stems and piston rods were temporarily removed, and the Westinghouse brake pump bracket was taken off. Steamrail fabricated new boiler cladding and made cosmetic enhancements to improve its appearance. J-550 comes alive every weekend, with smoke rising from its chimney, using the working firebox to generate it.