In cases where both the pinion and gear...

Question 1 / 270705eccef9fbacbc34ba4d46bc3

Question 1 of 270705eccef9fbacbc34ba4d46bc3

In cases where both the pinion and gear teeth of the main reduction gear have been slightly indented by foreign material, what action should you take?

Back

Question 1 of 27070

In cases where both the pinion and gear teeth of the main reduction gear have been slightly indented by foreign material, what action should you take?

🔍 Key Concepts

• Effect of raised metal/burrs on meshing gear teeth after an indentation • Purpose of relieving or dressing damaged areas on gear teeth vs. full replacement • Risks of continuing to operate reduction gears with even slight damage without corrective action

💭 Think About

• What happens to contact stress and tooth loading if an indentation leaves high spots or raised metal on the tooth surface? • In normal marine practice, when damage is slight and localized, what is the usual first corrective step before considering full gear replacement? • Which options actually change the tooth contact condition, and which options simply observe or minimally intervene without correcting the mesh?

✅ Before You Answer

• Verify which choice specifically addresses raised/peened metal around the indentation, not just the foreign material itself. • Check which action is appropriate for slight, localized damage (not severe damage) in a critical component like a main reduction gear. • Eliminate any option that leaves a known defect in the tooth contact area without proper corrective treatment.

Question 1 of 27070

In cases where both the pinion and gear teeth of the main reduction gear have been slightly indented by foreign material, what action should you take?

Replace both the pinion and gear.

Both the pinion and gear should be relieved of all raised metal around the indentation.

Remove the foreign material that caused the indentation and return the unit to service.

Closely monitor the damage to see if it spreads.

Question 1 / 270705eccef9fbacbc34ba4d46bc3

Question 1 of 270705eccef9fbacbc34ba4d46bc3

In cases where both the pinion and gear teeth of the main reduction gear have been slightly indented by foreign material, what action should you take?

Back

Question 1 of 27070

In cases where both the pinion and gear teeth of the main reduction gear have been slightly indented by foreign material, what action should you take?