truck![click to hear](/images/speaker.jpg)
Two- or three-axled carriage whose wheels are guided by the track; it supports a locomotive or a car.
spring ![click to hear](/images/speaker.jpg)
Part absorbing vibrations caused by the wheels as they move along the track.
truck frame ![click to hear](/images/speaker.jpg)
Framework supporting the axles, suspension, brakes and traction motors.
journal box ![click to hear](/images/speaker.jpg)
Part connecting the axle to the truck frame.
axle ![click to hear](/images/speaker.jpg)
Transversal part under a vehicle passing through the hubs of the wheels, which support it.