Final answer:
Vibration damper rubber should be inspected for factors such as hub contact area scoring, cracks, and oil soaking. Looseness is not relevant to the inspection of vibration damper rubber.
Step-by-step explanation:
Vibration damper rubber should be inspected for several factors to ensure its performance and functionality. However, the factor that is not relevant to the inspection of vibration damper rubber is looseness. Looseness primarily refers to the stability of the component and is not directly related to the condition or inspection of the rubber material.
On the other hand, the three important factors that should be inspected in vibration damper rubber are:
- Hub contact area scoring: This refers to any damage or scoring in the contact area between the rubber and the hub. Scoring can indicate excessive wear or damage to the rubber.
- Cracks: Inspecting for cracks is crucial as they can compromise the integrity and effectiveness of the vibration damper rubber. Cracks can result from ageing, exposure to heat or chemicals, or excessive strain.
- Oil soaking: Oil soaking refers to the absorption of oil by the rubber material. This can lead to degradation and loss of mechanical properties, reducing the effectiveness of the vibration damper rubber.