Master Cylinder, clutch - PND123 TRW

The clutch of a car is a unit that has a very important function - it provides a soft and painless gear change for the car.

The task of the clutch is to transfer torque from the engine to the transmission, to disconnect the transmission from the running engine for the time it takes for the driver to engage the desired gear in the gearbox, and to ensure a smooth connection of the transmission back to the engine. One of the main parts of the clutch is the clutch master cylinder.

1. 740 (744)
2. 740 Saloon (744)
3. 760 (704, 764)
4. 760 Saloon (704, 764)
5. 740 Kombi (745)
6. 740 Break (745)
7. 740 Estate/Combi (745)
8. 740 Rural (745)
9. 760 Kombi (704, 765)
10. 760 Break (704, 765)
11. 760 Rural (704, 765)
12. 960 (964)
13. 960 Kombi (965)
14. 960 Break (965)
15. 940 Kombi (945)
16. 940 Break (945)
17. 960 II (964)
18. 960 II Saloon (964)
19. 960 Mk II (964)
20. 960 II Estate (965)
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The principle of the clutch master cylinder work

The TRW brand Master Cylinder, clutch generates and controls line pressure between the master and slave cylinder, which is then converted by the clutch slave cylinder into sufficient mechanical force on the clutch fork to disengage the clutch (disengaging the discs).

This simple set of parts assembled into a single unit controls the brake fluid pressure in the clutch hydraulic system and at the right time transfers this pressure to the clutch slave cylinder, which in turn creates a mechanical force on the pusher, then on the fork, and then on the clutch release bearing.