At the front of the engine, mounted on top of the smokebox you will note the large headlight, and on either side about half way down, the marker lights and the flag holders. Behind the headlight is the smoke stack. On either side of the smoke stack is a bracket which held the number boards (missing). The two mounting brackets behind the smoke stack are for the electrical dynamo (missing). Next are the bell, the sand dome, the steam dome, and then the cab. The whistle and safety valves are located on the steam dome. The water supply pipes run along the boiler from the injectors in the cab to the red-painted check valves. The single compressor is mounted on the left side above the runningboard. The long metal bar on the right side just above the runningboard is the reversing, or "reach" rod that is controlled by a lever in the cab. Beneath the runningboard, just ahead of the cab on each side, is an air reservoir for the air brake system.

Note the square box atop the cylindrical piston cylinder. This is the valve chest. Engine 314 has older style, flat D-shaped slide valves instead of cylindrical valves. The small pipe leading from the boiler into the valve box directed steam directly on the top of the valve to hold the valve in place. 314 also had inside valve gear, most of which is missing. If you look at the axle of the middle driving wheel, you will see two cams. The valve gear worked off these cams.

The cab of #314 is open to the public. Note that the Southern Pacific painted red anything that was handled by either the engineer or the fireman. This includes valve handles, the throttle, the reverse lever, and brake handles. Mounted on the boiler on either side, just behind the front cab wall, are the injectors which force water into the boiler from the tender. On the engineer's side (right side) are the throttle mounted high up at the back of the boiler, the train brake mounted by the engineer's left hand, the engine brake - the small handle next to the cab wall ahead of the engineer's seat, the reverse lever (the Johnson Bar) - the long handled lever mounted atop the toothed crescent (it is connected to the reach rod) and the cylinder cock lever - used to purge water from the cylinders - mounted on the floor. The whistle cord runs from the whistle arm to the back of the cab.

On the backhead, where the engineer could see them, are gauges to tell him the steam pressure in the boiler and the pressure in the air brake system. Also where he could easily reach them, are three valve handles in a slanted line. These are called "try cocks" and were used to tell the crew how much water was in the boiler; if water came out of the top valve, everything was OK, but if steam came out the lower one, they were in trouble and needed to stop to take on water.

On the fireman's side are the oil control valve, the water supply valves, and a steam pressure valve. The bell cord runs from the bell arm to the back of the cab. The small box mounted on the back of the cab, under the roof, carried emergency flares, flags, and "torpedoes" which were small explosive devices that would be detonated by the wheels of a train. If a train made an unscheduled stop, the flagman would walk back down the tracks and place torpedoes on the tracks to alert oncoming trains that there was another train ahead.

Mounted on the front of the tender is a small box - the sand box. Occasionally the firemen would throw sand into the firebox and the sand being carried along by the exhaust gases would clean out the boiler flues and the smokebox. The tank on top of the tender carried oil, while water for generating steam was carried in the larger compartment beneath. The oil compartment hatch is mounted on top, middle, of the tender while the water compartment hatch is toward the rear.