Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules (1908)
National correspondence school of railroading, Chicago. [from old catalog] · [Chicago] · leaf 202
nin Plate 71, the crosshead blocked ahead and the cylindercock removed from the end of the cylinder in which thepiston is blocked. When blocked in this manner, oneend of the cylinder is connected to the steam-chest, whichwill admit steam to the cylinder and against the pistonhead. Good blocking… … PLATE 71. If the cylinder cock were not removed and the throttleshut off, the pressure on one side of the piston wouldquickly escape and the pressure which had accumulatedback of the piston would shift the piston and cross-head, causing further damage when the throttle wasagain opened. Broken…
Locomotives
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