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CDifficulty 2/5

In a clutch disc with a coil-spring torsional damper, what do those springs between the disc and its hub do?

Correct answer

Damp torsional variations and smooth torque transmission.

They damp torsional variations and shocks when transmitting engine torque to the gearbox, contributing to smoother transmission. They are distinct from the pressure assembly’s diaphragm spring, which acts on the pressure plate to clamp the disc against the flywheel. Other disc and damper designs exist; the question concerns the specified type.

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  • Damp torsional variations and smooth torque transmission.

  • Always keep the disc separate from the flywheel, even when engaged.

  • Replace the pressure plate and directly clamp the disc against the flywheel.

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