. The science of railways . evolutions have been made andthe cylinders are free from water caused by con-densation or priming, the engineer should movethe cylinder cock lever into the central position, A^,causing the engine to work compound should be done before the reverse lever isdisturbed from its full gear position. Ordinarily, the reverse lever should not behooked up, thereby shortening the travel of OPERATION OF COMPOUND LOCOMOTIVES. 197 the valve, until after the cylinder cock lever hasbeen placed in its central position, but it is oftennecessary to open the cylinder cocks
. The science of railways . evolutions have been made andthe cylinders are free from water caused by con-densation or priming, the engineer should movethe cylinder cock lever into the central position, A^,causing the engine to work compound should be done before the reverse lever isdisturbed from its full gear position. Ordinarily, the reverse lever should not behooked up, thereby shortening the travel of OPERATION OF COMPOUND LOCOMOTIVES. 197 the valve, until after the cylinder cock lever hasbeen placed in its central position, but it is oftennecessary to open the cylinder cocks when atfull speed to allow water caused by priming orfoaming to escape from the cylinders, and in suchcases no disadvantage is experienced, and thereverse lever need not be disturbed. The starting device is simply designed foruse in the starting of the train and should not beused at any other time unless there is imminentdanger of stalling and the lever has been previ-ously dropped to full gear. In other respects, aside from these here noted, the rules governingthe operation of compound locomotives in gen-eral should be clearly understood by any engineerw^ho is liable to be called upon to run a compoundlocomotive of this or other design. REPAIRS. The builders of the Vauclain four-cylindercompound claim an advantage in it over the 198 ENGINEERS AND FIRE MENS two-cylinder or cross-compound locomotivein simplicity of parts, there being no intercept-ing valve,* and a similarity to all the parts of asingle-expansion locomotive. Thus its repairswill be similar to those of simple carry out this simplicity of parts, the pistonrods of the high and low-pressure cylinders areof the same diameter and designed strong enoughto withstand the severest strains of service. The packing rings in the valves are easilyreplaced and the valve chest bushing can becheaply and easily renewed. In extracting oldbushings it is best to split them between theports with a nar
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1900
