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Which procedure prevents uneven pad deposits?

  • A.Fitting the pads dry
  • B.Applying the brakes firmly several times when the vehicle is new, which transfers a uniform layer to the disc
  • C.Correct bedding in of new pads
  • D.Machining the disc before fitting the new pads, which ensures a true surface for the material to transfer onto

Answer: C

Bedding in uses a series of moderate applications with cooling between them, which lays down an even transfer layer. Holding the brake on while hot is exactly what deposits material unevenly. The last option describes a version of the procedure done wrongly. The order in which the effects act is what decides the outcome, so it is worth establishing first. Most errors here come from carrying across a result from a neighbouring case where it does not hold.

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