Which factor is NOT a contributor to unusual wear on mechanical joints?

Regularly checking the joints is essential for maintaining the mechanical integrity of equipment and preventing unusual wear. When joints are inspected frequently, potential issues can be identified before they lead to significant wear or failure. This practice allows for timely maintenance and adjustments, which can help ensure that the joints operate smoothly and effectively under expected load conditions.

On the other hand, failing to grease bearing surfaces, having excessive dirt in the hydraulic system, and applying unnecessary stresses and shocks all contribute to increased wear on mechanical joints. Lack of lubrication causes friction that accelerates wear, dirt can cause obstructions and abrasiveness, and extra stresses can lead to premature fatigue of the materials involved. Thus, regular checks serve as a preventative measure against such wear, making it a key factor in the longevity and reliability of mechanical joints.