Hub Seal Leaks
This is intended to show everyone why hub seal leaks have the potential to be a big deal. Apart from the cosmetic issues hub seal leaks will lead to loss of braking and ultimately seized bearings, both of which can ruin your day.
The pictures below show how brake shoes (or discs) get covered in gear oil, and the brake drum also gets coated effectively eliminating the friction between the braking parts.
Every time a coach is serviced whoever is responsible should shine a flashlight at the rear side of the wheels and brake area to look for signs of leakage. As an owner pay close attention to any visble signs of grease or oil on or behind the wheels visible through the holes around the perimeter of the wheels.
It is significantly less dangerous and expensive to fix a hub seal leak when first noticed than to wait.
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