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Which repair is possible on a ring gear damaged in one place?

  • A.Rotating the ring gear on the flywheel, which brings undamaged teeth into the position where the pinion engages
  • B.Replacement of the ring gear on the flywheel
  • C.Welding the damaged teeth, which restores the profile and is a recognised repair for a flywheel ring gear
  • D.Machining the teeth

Answer: B

A ring gear is an interference fit and is heated to remove and to fit, so replacement is the normal repair. Some ring gears genuinely can be reversed to present the unworn face, which makes the last option a real technique on certain flywheels. Tracing the requirement back to the physical constraint that produces it makes the answer follow. Checking which component actually carries the load settles most questions of this kind at once.

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