The Td5 clutch system

 

The most land rover have simple, solid, one piece fly wheel. The td5 uses a more complex dual mass fly wheel that is, in effect, two fly wheel ( primary and secondary )connected by a system of internal spring, which transfer the engine drive from the primary fly wheel to the secondary. In doing so, they damp out engine vibrations and cylinder firing pulls to give a smoother drive to the gear box and a more refined an environment in the discovery’s cab. The twin fly wheels are held together permanently as one unit, but bearing mount between them allows the secondary fly wheel to rotate up to 70 back and forth against the spring pressure in relation to the primary. It’s this oscillation between the two fly wheels cushioned by the damper springs that eliminate the engine vibrations and pulsation. The higher the torque load, the greater the relative rotation between the fly wheels. The whole seen drilled in the side of the flywheel are registered by the crankshaft position sensor signals the ECU, which than computers the engine speed and thus adjusts fueling and other parameters. The ring gear for the starter motor is attached to the primary flywheel and can’t be removed so, if it’s damaged worn, a new flywheel is needed. Having said that, starter motor and there gearing are of much better dishing than on earlier models and its unlikely the ring gear would nAdd captioneed replacement during normal use. The clutch friction disc and pressure plate sit against the secondary flywheel in the conventional manner. But the TD5’s clutch friction disc differs from earlier types by having a solid center without the usual integral damping springs. Earlier models friction disc have damping spring around the center to achieve a smooth take up and release of the clutch, but this effect already provide by the TD5’s dual mass flywheel. It’s worth mentioning the clutch switch here even though it’s not strictly part of the clutch system. It’s mounted on the clutch master cylinder and signal the engine ECM each time the clutch is operated. The ECM respond by restricting the rise in engine sped when the clutch is disengaged, producing a smoother gear change, and also reducing emissions and fuel consumptio