BELL COCK
When this valve is opened the bell begins to ring.

BRAKE A: INDEPENDENT BRAKE VALVE
Operates the brakes on the locomotive and tender independent of the train car brakes.

BRAKE B: AUTOMATIC BRAKE VALVE
Controls the compressed air into and out of the brake pipes. The engineer can set this valve lever to several different positions for different types of braking.

FIRE BOX
Coal is burned in the fire box to heat the boiler water to steam.

GAUGE COCKS
Each of these three small valves or cocks draws from a different height in the boiler. By opening each cock and seeing if the water is up to that level the engineer can judge how high the water is in the boiler. These are also know as the tri-cocks.

INJECTOR
Pulling this handle opens a pipe from the tender to the boiler and fills the boiler with water.

JOHNSON BAR
The reversing lever, nicknamed the Johnson Bar, controls the valves to the driving cylinders allowing the engineer to select forward or reverse.

STEAM GAUGE
The needle and dial on this gauge indicate steam pressure in the boiler.

THROTTLE
This long handle allows the engineer to adjust a valve controlling the steam flow from the boiler to the driving pistons.

WATER GLASS
A tube connected to the boiler tank shows the water level in the boiler through this glass tube. The glass indicator is subject to false readings and should be used in conjunction with the gauge cocks.

WHISTLE CORD
This rope hanging from the roof of the cab controls the whistle.