Locomotive Engine Running and Management

by Angus Sinclair

PRELIMINARY OPERATIONS.

Let us suppose the engine to be an ordinary eight-wheel locomotive, with cylinders 17 × 24 inches. Let us assume that the top and bottom rocker-arms are straight, of equal length, and that the eccentric-rods are connected to the link so as to be opposite the block in full gear. This will make the extreme travel of valve equal the eccentric’s throw. We will now look round to see that every thing connected with the motion is ready for valve-setting.

First, it is necessary to see that the wedges are properly set up to hold the driving-boxes in about the same position they will occupy when the engine is at work.