What is the acceptable travel measurement for slack adjusters on a bucket truck's air brakes?

The acceptable travel measurement for slack adjusters on a bucket truck's air brakes is 2.5 inches. This specification is essential for ensuring the proper function of the braking system, as slack adjusters help maintain the appropriate distance between the brake pads and the brake drum, allowing for effective braking and safety.

When the slack adjusters are functioning correctly and within this measurement range, it indicates that the air brake system is appropriately adjusted, reducing the risk of brake failure or inefficient braking. The measurement ensures that there is enough play in the system to allow for proper operation while preventing excessive slack that could lead to decreased performance or safety hazards.

In contrast, measurements outside the specified range—whether too high or too low—can lead to compromised braking effectiveness, which is crucial for the safety of the vehicle and its operation, particularly in the context of a bucket truck operating at heights.