In air brake systems, what might a belt deflection measurement outside of 12 to 18 mm indicate?

A belt deflection measurement outside of the 12 to 18 mm range in air brake systems typically indicates a potential failure. The proper belt deflection is crucial for the effective operation of the air brake system, as it ensures that the necessary tension is maintained for the belt to function correctly. If the deflection is too high, it may suggest that the belt is too loose, potentially leading to slippage or inadequate power transmission to critical components. On the other hand, if the deflection is too low, it could indicate that the belt is overly tight, which can increase the risk of premature wear or damage to the belt or associated hardware. Therefore, checking belt deflection is an essential part of regular maintenance to prevent serious issues that could compromise the overall braking system's functionality and safety.