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Which quantity of grease should a wheel bearing hub contain?

  • A.Enough to coat the rollers with a reserve in the hub
  • B.The hub packed completely full, which ensures that lubricant is available throughout the whole service life
  • C.A light film only
  • D.Half the volume of the hub cavity, measured accurately so that the churning losses are kept to their minimum

Answer: A

The rollers are packed by hand and a reserve is placed in the hub, but filling it completely causes churning, overheating and grease escaping past the seal. Manufacturers give a quantity where it matters. Underfilling is as damaging as overfilling. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb. Reading the definition literally, rather than recalling a summary, avoids the usual confusion.

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