Borsehung B17835 Shaft Seal, wheel hub

Description

The shaft seal wheel hub in your Audi plays a crucial role in protecting the wheel bearing and other internal components from dirt, water, and other contaminants. Here’s a breakdown of its function and key features:

Function:

• Located between the axle shaft and the wheel hub, the shaft seal creates a tight seal, preventing:
  • Foreign objects: Dirt, dust, water, and debris from entering the bearing, which can cause wear and tear, corrosion, and premature failure.
  • Lubricant leakage: Grease from the bearing leaking out, reducing lubrication and further damaging the bearing.

Design:

• Typically made of rubber or other flexible material with a metal spring for tension.
• Has a lip that contacts the rotating axle shaft, creating a tight seal.
• Some seals may be single-lipped, while others have double lips for enhanced protection.

Audi shaft seal wheel hub

Signs of a failing shaft seal:

• Leaking grease around the wheel hub: Visible grease build-up near the seal or on the inner side of the wheel.
• Grinding or humming noises from the wheel: Worn bearing due to lack of lubrication or contamination.
• ABS or traction control system malfunction: Sensors might be affected by dirt or water entering due to a faulty seal.

Maintenance and replacement:

• Shaft seals have a limited lifespan and require replacement over time, especially if exposed to harsh driving conditions or extreme temperatures.
• Replacing a worn-out seal is essential to prevent further damage to the bearing and other components.
• This typically involves removing the wheel and hub, accessing the seal, and carefully installing a new one. It’s recommended to have this done by a qualified mechanic to ensure proper installation and avoid further issues.