A clutch linkage can perform the same controlling action as the shaft and lever linkage but with fewer parts. The cluch cable sytem does not take up much room. It also has the advantage of flexible installation so it can be routed around the power brake and steering units. These advantages make it the most commonly used clutch linkage.
Typical clutch cable system.
When a car has a cable, adjustment is made by adjusting the length of the outside of the cable housing.
Adjusting a linkage type requires a similar adjustment to a threaded rod.
Mechanical clutch linkage. Courtesy of Ford Motor Company.
Hydraulic systems are often self adjusting and have a full-time contact release bearing. On the systems that require adjustment, there is an adjustment on the slave cylinder pushrod.