Diseases of the air brake system; their causes, symptoms and cure . tly with leakage, the size of the drum and thelength of the cars, but a little practice will enable anyoneto make a very close guess. If the obstruction in thepipe is of such a nature that it permits the passage of airin one direction but not in the other, it is apt to be stillmore dangerous. This has been known to occur througha curling up of the inside lining of the hose, the rubberrolling up into a ball, and, just like a valve, opening oneway and closing the other. It might also be caused bythe cylindrical screen in the car
Diseases of the air brake system; their causes, symptoms and cure . tly with leakage, the size of the drum and thelength of the cars, but a little practice will enable anyoneto make a very close guess. If the obstruction in thepipe is of such a nature that it permits the passage of airin one direction but not in the other, it is apt to be stillmore dangerous. This has been known to occur througha curling up of the inside lining of the hose, the rubberrolling up into a ball, and, just like a valve, opening oneway and closing the other. It might also be caused bythe cylindrical screen in the car drain-cup collapsing orclogging up with dirt. Plate IGb, taken from the Rail-way Age, shows one that was in the possession of Mr, Rhodes. It is a fair sample of many that are nowin service. Diseases of the Air Brake System. 65 Cases are also recorded where ice has been formed inthe coupling or hose sufficient to obstruct the often results from allowing the hose to hang downand drag through the snow, and afterward coupling itwithout a I Diseases of the Air Brake System. 67 AUXILIARY RESERVOIR, It is not generally supposed that anything ever goeswrong with the auxiliary reserv^oir, as it is nothing but astorage tank for air. It plays a very important part, however, in the actionof the triple valve, and any leakage here, even thoughvery slight, may seriously interfere with the functions ofthe most vital mechanism of the brake. Except in so faras such leakage will cause a slight drain on the pressurein the train-pipe, any trouble with the auxiliary reservoiris purely local, however, and affects only the one car inthe train. Since the freight and passenger reser\oirs are of differentconstruction, we shall have to consider them separately. PASSENGER AUXILIARY. The arrangement for quick-action brake on passengercars is one which nearl}- all railroad men are familiar with. There are only two points on this reservoir liable toleakage: the bleeding cock i
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