Saliva constantly flows from the salivary glands in your mouth. Sometimes, the chemicals in saliva can crystalise to form a tiny stone. Salivary gland stones ('salivary calculi') can become lodged in the duct (tube) leading from the salivary gland, blocking the flow of saliva into the mouth. This can cause swelling and pain in the gland.
Hub assemblies and wheel bearings. Located between the brake drums/discs and the drive axle, the hub assembly is mounted to the holding bracket of the chassis on the axle side. On the drum/disc side, the wheel is connected to the hub assembly via bolts. The wheel bearing itself is inside the hub unit.
There's nothing mysterious about wheel bearings, even though they're not something most drivers are accustomed to seeing. Wheel bearings are simply a set of steel balls kept in place by a metal ring called a race.Their job is to enable the wheel â or wherever else they're attached â to spin with as little friction as possible. On a vehicle, they sit between the axle and the wheel, enabling the wheel and hub to spin freely on the axle.ne indication that a wheel bearings replacement job is in your vehicle's future is the appearance of wheel bearing noise. That noise could be an early warning that a wheel bearing is about to fail.