Coupler Operating core parts are these :

• Knuckles 
  
• Knuckle Throwers
  
• Locks
  
• Lock Lifters
  
• Knuckle & Coupler Connector /Toggler 

 These part are the Attachment & Support:

• Coupler Yoke 
• Yoke Pin 
• Yoke pin retainer
• Fellower 
• Stricker /striking casting 
• Coupler carrier 

Here are some specific parts related to coupler operation:

• Knuckle Throwers: Knuckle throwers are mechanical devices or mechanisms used to facilitate the automatic or manual throwing of knuckles. They enable the knuckles to move into the open or closed position for coupling or uncoupling.

• Locks: Locks are safety devices that secure the knuckles in the closed position, ensuring a reliable connection between coupled cars. They prevent accidental uncoupling during train operation.

• Lock Lifters: Lock lifters are tools or mechanisms used to lift the locks and disengage them from the knuckles. This allows for the opening of the coupler and uncoupling of the cars when necessary.

• Knuckle & Coupler Connection Pins: These pins are used to connect the knuckles to the coupler body. They provide a pivot point for the knuckles, allowing them to move and engage with other couplers during coupling or uncoupling operations.
  

  
  These parts work together to ensure the safe and efficient coupling and uncoupling of railroad cars, enabling the formation and separation of trains as needed.