Technician Handbook ! 302 Manual Transmissions & Transaxles Self-adjusting Release Cylinder When the master cylinder directs fluid to the release cylinder, the piston in the release cylinder moves the push rod out against the release fork. Since the release bearing is connected to the release fork, the force is transmitted to the diaphragm spring of the clutch cover. The clutch disc is then disengaged. When the clutch pedal is released, the diaphragm spring in the clutch cover moves the push rod and piston back in the bore of the release cylinder. A conical spring exerts pressure against the release fork. So, the release bearing is in constant contact with the diaphragm spring.
Since there is no free play, there is no need for adjustment since clutch wear causes the diaphragm spring to force the pushrod further into its cylinder reservoir. The bleeder screw is used to remove air from the system. Technical Training 17