Where is the air compressor switch located on PA4s?

The air compressor switch on PA4 locomotives is located at the #2 end. This location is significant because it provides the crew with easy access to control the air compressor, which is essential for operating the brakes and other pneumatic systems on the locomotive. By having the switch at this specific end, it allows for efficient monitoring and operation without needing to move to another area, ensuring timely action in response to system needs.

Understanding the correct location of operational switches is crucial for maintaining safe and efficient train operations, making it vital for engineers to be aware of the layout of the locomotive's control systems. This knowledge contributes to quick decision-making when adjustments or troubleshooting is required during service.