A hydraulic clutch is a self-adjusting clutch system. Since the friction material on the clutch plate will wear down over time, the hydraulic clutch will automatically adjust to make for this loss. If you aren’t comfortable with the level at which your clutch engages, you can easily adjust it by following the steps below.
1 – Locate the Pushrod
Your first step in adjusting a hydraulic clutch is to find the slave-cylinder pushrod and determine if it is adjustable. The only way to adjust a hydraulic clutch is by adjusting the length of the slave-cylinder pushrod. If your pushrod is not adjustable, you may be able to find a suitable replacement at a junkyard that you can install.
First, locate the clutch master cylinder body. Follow the metal tubing coming from the rear of the clutch master cylinder body. It will turn into flexible hosing as it get to the slave cylinder. Inside this piece are a seal, piston, rubber boot, push rod, locking nut, and adjustable nut.
2 – Adjust the Pushrod
Now that you have found the pushrod located inside the slave cylinder, you can now use your wrench to adjust it. Turning the adjustable nut to make the push rod longer will give the clutch more time to engage, while turning the adjustable nut the opposite way to make the push rod shorter will shorten the length of time to engage.
If you have any indications of a a bad clutch master cylinder while carrying out clutch tests or these adjustments, you should replace or fix it immediately.