Which adjustment should be the first performed for conventional steering gear?

The first adjustment that should be performed for conventional steering gear is the gear mesh preload. This adjustment is critical because it ensures that there is proper contact between the gears, which allows for smooth steering operation. By setting the gear mesh preload correctly, any excessive wear or play in the steering gear can be minimized. Proper gear mesh preload ensures that the teeth of the gears are correctly aligned and engage optimally, which directly impacts steering feel and responsiveness.

Adjusting gear mesh preload first creates a solid foundation for subsequent adjustments. After establishing the proper tension between the gears, the technician can address other adjustments such as worm bearing preload, tolerance adjustment, and sector shaft endplay. These adjustments can be more effectively made once the gear mesh preload is correctly set, as they rely on the established interactions within the steering gear. Therefore, prioritizing the gear mesh preload ensures a well-functioning steering system.