Which steering gear box adjustment should be performed first?

The first adjustment to be performed on a steering gear box typically involves the worm bearing preload. This adjustment is crucial because it sets the initial resistance to rotation of the worm gear, which directly affects the overall steering feel and precision. By establishing the proper preload, the components can operate smoothly without excessive play, enabling more accurate control of the steering system.

Adjusting the worm bearing preload first ensures that it is appropriately positioned to support the operation of the steering gear. Following this initial adjustment, other adjustments, such as sector shaft preload and over center settings, can be made with the assurance that the foundational components are set correctly. This sequence is important because it prevents excessive wear and ensures that all adjustments made afterward are effective and do not compromise the adjustment of the worm bearing itself.