Her steam chests punctured, Keystone State lost all power and had to be towed to safety.
He advanced from the running board to the steam chest and then to the pilot beam to adjust the spark screen.
The adjustable valve comprised a disk covering a small hole at the top of the boiler above the water level in the steam chest.
If this reverser misbehaved under the fluctuating pressures present in the steam chest, the locomotive seemed to have a will of its own.
Some locomotives have an additional pressure gauge in the steam chest.
In the 3001 class the steam chest was located underneath the cylinders, and contained two slide valves.
The class were fitted with a steam chest and slide valves located beneath the cylinders.
Because the steam chest was below the cylinders, and not between them, the latter could have an increased diameter.
It is situated in the steam chest, and moved by the valve gear.
The steam chests and the Stephenson valve gear were on the inside.
