Heavy Duty Equipment Technician Red Seal Exam Prep · Question
What is the primary function of the pilot bearing in a heavy-duty manual transmission clutch system?
The pilot bearing supports the end of the transmission input shaft where it enters the crankshaft, allowing the input shaft to spin at a different rate than the
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Question: What is the primary function of the pilot bearing in a heavy-duty manual transmission clutch system?
Answer options: ✅ To support the input shaft at the rear of the crankshaft and allow it to rotate independently of the flywheel.
- To provide a thrust surface for the clutch release bearing.
- To damp torsional vibrations between the engine and transmission.
- To facilitate the engagement and disengagement of the clutch disc with the flywheel.
Correct answer: To support the input shaft at the rear of the crankshaft and allow it to rotate independently of the flywheel.
Explanation: The pilot bearing supports the end of the transmission input shaft where it enters the crankshaft, allowing the input shaft to spin at a different rate than the crankshaft when the clutch is disengaged. Thrust surfaces are for the release bearing, damping vibrations is the function of the clutch disc springs, and engagement/disengagement is handled by the entire clutch assembly.
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