The ball joint provides the mobile connection between the suspension lever and the spindle, and the ball joint must adjust the rotational movement and absorb the entry and exit movement of the suspension lever. A rubber cover protects the ball joint from dirt and moisture and also retains the grease that lubricates it.
The grease in the ball joint is essential for long-lasting operation without excessive wear, the grease forms a film between the ball and the bowl and thus prevents metal-to-metal contact. Metal-to-metal contact will damage the ball and bowl, resulting in excessive wear.
Note: Never use grease when pressing.
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