What could lead to failure in the suspension of a heavy-duty truck?

In the context of heavy-duty truck suspension systems, each factor mentioned can significantly impact the overall performance and reliability of the suspension.

Improper tire pressure affects how the tires interact with the road surface, which directly influences the load that the suspension system must bear. If the tire pressure is too low or too high, it can lead to uneven wear, decreased handling control, and increased strain on the suspension components.

Load distribution errors can also lead to suspension failure. When a truck is not loaded properly, with weight unevenly distributed across the axle, it can cause excessive stress on certain parts of the suspension system. This uneven loading can result in premature wear or even failure of suspension components, as they may not be designed to handle the unequal forces.

Inadequate routine checks are essential for identifying potential issues before they lead to failure. Regular inspections and maintenance help to ensure that all components are functioning correctly and can reveal problems such as worn bushings, shocks, or springs that might otherwise go unnoticed until they fail completely.

Thus, each of these factors contributes to the likelihood of suspension failure, making "All of the above" the most comprehensive choice as all elements are important to the integrity of a truck's suspension system.