Locomotive Engine Running and Management

by Angus Sinclair

BROKEN VALVE-STEM, OR VALVE-YOKE.

For a valve-stem broken, the eccentric-strap or link need not be interfered with. If the break is outside the steam-chest, take down the valve-stem rod, and set the valve on the middle of the seat; take down the main rod, and secure the piston as previously directed. With a valve-stem broken inside the chest, or a valve-yoke broken, a little additional work is necessary. The steam-chest cover must now come up, and the valve be secured in its proper place by pieces of wood, or any other material that will keep it from moving; and the stuffing-box must be closed, to prevent escape of steam through the space vacated by the valve-stem.