. Air brake text for engineers and firemen; . 63 PLATE 68. the reversing cock, and its operation is fully illustrated and de-scribed on Pages 58 to 62. Adjustment. The regulating spring Gy is generally adjustedto maintain a pressure of 70 pounds in the brake pipe by the lowpressure feed valve, and no pounds by the high pressure feedvalve. The details of both feed valves are identical. 156 REVERSING COCK. The defects of the slide valve feed valve are similar to thoseused on the G-6 brake valve. If either of the pipes leading to the feed valve becomes brokenit would be necessary to remove the pi
. Air brake text for engineers and firemen; . 63 PLATE 68. the reversing cock, and its operation is fully illustrated and de-scribed on Pages 58 to 62. Adjustment. The regulating spring Gy is generally adjustedto maintain a pressure of 70 pounds in the brake pipe by the lowpressure feed valve, and no pounds by the high pressure feedvalve. The details of both feed valves are identical. 156 REVERSING COCK. The defects of the slide valve feed valve are similar to thoseused on the G-6 brake valve. If either of the pipes leading to the feed valve becomes brokenit would be necessary to remove the pipe bracket from the brake. 63 PLATE 69. valve, and connect the. feed valve with the brake valve, whichwould allow the same pressure to be used as before. 157 THE NO. 6 ET LOCOMOTIVE BRAKEEQUIPMENT. The new locomotive brake equipment here illustrated anddescribed is known as the ET (engine and tender) brake equip-ment. It differs materially from the present combined automaticand straight air brake in that it consists of considerably less ap-paratus. In operation it possesses all the advantages of the lattertype of brake equipment, and in addition several other importantones which are necessary in modern locomotive brake service. The design of the principal valves comprising the ET equip-ment is such that it may be applied to any locomotive, whether inhigh speed passenger, double pressure control, ordinary passengeror freight, or any kind of switching service, without change orspecial adjustment of the brake apparatus. All valves are so de-signed that they may be removed for repairs and replaced withoutdisturbing
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