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How Does A Hydraulic Clutch Work

Hydraulic Clutch Work

Fig. shows a Hydraulic Clutch Work. When the clutch pedal has pressed the fluid under pressure from the master cylinder reaches the slave cylinder which is mounted on the clutch itself. The Huid under pressure actuates the slave cylinder push rod which further operates the clutch release fork to disengage the clutch. In the engaged condition when the clutch pedal is in the released position, the push rod rest against its stop due to the pedal return spring.

Hydraulic Clutch Diagram

Hydraulic Clutch Work



The flange at the end of the valve shank contacts the spring retainer. As the plunger has moved to its rear position, the valve shank has the valve seal lifted from its seat and the seal spring compressed. Hydraulic fluid can then How past the three distance pieces and valve seal in either direction. However, when the clutch pedal is pressed to disengage the clutch, the initial movement of the pushrod and plunger permits the seal spring to press the valve to the shank and seal against its seat. This disconnects the cylinder from the reservoir. 

Further movement of the plunger displaces Huid through the pipelines to the slave cylinder and disengages the clutch. The construction 0f the slave cylinder is made clear by means of Fig. The return spring in the slave cylinder maintains some pressu1 e on the release fork so that the thrust bearing is always in contact with the release levers. Moreover, in case of wear of the clutch facing, the return spring and the piston move out automatically to take up the tilt of the release fork lever. Unlike cables, hydraulic operation doesn't involve ‘ resistance wear, especially when subjected to large forces.

Due to this reason, the hydraulic operation is especially suitable for heavy-duty applications i.e. on large vehicles.

Hydraulic Clutch Advantages

1. Self-adjusting to a point.
2. Less effort compared to a mechanical clutch.
3. Self-lubricating whereas cables need to be lubricated from time to time.

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