A hydraulic clutch slave cylinder is being replaced. What should the technician do first?

• A. Disconnect the clutch pedal pushrod
• B. Remove the slave cylinder from its mounting
• C. Disconnect the hydraulic line
• D. Adjust clutch pedal free-play

Answer: (A)

When replacing a hydraulic clutch slave cylinder, the first priority is to isolate the hydraulic circuit so you can remove the part without forcing fluid or damaging components. The clutch system uses the master cylinder at the pedal to generate hydraulic pressure that moves the slave cylinder. If the pushrod at the pedal/master cylinder end remains connected while you detach the slave, hydraulic pressure can push fluid through the line or the pushrod could be driven or misaligned, risking damage to seals, the master cylinder, or the fork linkage. Disconnecting the clutch pedal pushrod first breaks that path of force, allowing you to safely remove the slave cylinder from its mounting and then proceed with disconnecting the hydraulic line and installation of the new unit. After replacement, the system should be bled to remove air and the pedal free-play checked or adjusted as needed.