Derailments. If the locomotive leaves the rails for any reason whatsoever, the throttle valve should be closed and the brakes applied. As soon as the locomotive has come to a stop, protection should be made against approaching or following trains. If the locomotive remains in an upright position and the crown sheet and flues are protected by being covered with water, the fire need not be drawn. In case they are exposed the fire should be drawn, or covered with dirt, gravel, or fine coal, or quenched with water. If not off too badly or too far away from the track, the engine can usually be made to help itself on without the aid of another by using blocking under the wheels and by the aid of "replacers". The engine can, as a rule, be placed on the track easier by moving it in a direction opposite to that in which it ran off.
If conditions are such that the locomotive cannot help itself on the track, it will probably be necessary to secure the assistance of another. If it is too great a distance from the track or over on its side, it will be necessary to send for the wrecking crew.
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