Watch a detailed 33-minute video demonstrating the repair and machining of parts for a steam locomotive brake valve. Follow along as Keith Rucker from VintageMachinery.org disassembles the broken valve, explains its functionality, and meticulously crafts a new brass stem using a Monarch Model K metal lathe and Wells Index vertical milling machine. Learn about the step-by-step process of turning, cutting, and milling the stem before reassembling the valve to restore it to operational condition. Gain insights into vintage machinery restoration techniques and the intricacies of steam locomotive maintenance in this comprehensive tutorial.