11
2026
-
11
An experienced driver tells you how to tell if the clutch is heavy and how to fix it
A fall rain brings a chill, and the crisp autumn weather is gradually getting cooler. The bone-chilling winter is about to arrive. Many elderly people find that as winter comes, old ailments resurface, causing great discomfort. Many vehicles, like humans, also start to show certain faults in winter. Today, I want to share with fellow drivers some issues that concern many car owners. ▎Heavy clutch, how to determine and repair it? Nowadays, many cars use pneumatic or hydraulic assist clutches to reduce driver fatigue. When a vehicle experiences a heavy clutch while driving, the following aspects are generally considered.
First, check the air pressure. Make sure the pressure is normal; with normal conditions, above 6 units of air pressure, the clutch pedal should work properly. If the dashboard shows normal but the pressure drops at the clutch slave cylinder, check the vehicle's four-way circuit return air valve and the air flow of all individual pressure regulating valves on the vehicle.
● Secondly, check if there is any air leak at the gas pipe joint of the distributor valve
There is a small filter inside the distributor valve, if it gets blocked due to lack of maintenance over time, it can cause poor air intake, preventing the clutch booster pump from working effectively, making the clutch heavy.
● Thirdly, if the above two points are fine, consider a fault in the clutch slave cylinder
If the above two points are normal and the clutch slave cylinder has no issues, then directly consider whether the clutch pressure plate and clutch disc have been worn over time, or if there is a lot of dust inside the claw, causing the release claw to be too stiff, making the clutch heavy.
● Fourth, check if the fork shaft bushing and fork are severely worn
Check whether the release bearing has been worn for a long time, causing the clutch release bearing to become loose or unevenly stressed, resulting in a heavy clutch.
▎ How to solve the problem of the clutch pedal being too high or too low?
Many experienced drivers have encountered the situation where the clutch pedal fluctuates while driving normally, sometimes high and sometimes suddenly low.
First, check if your clutch fluid is sufficient, then check the master or slave cylinder. If the master cylinder has an adjustment rod, you can directly adjust the screw; tightening it shortens it, lowering the pedal. Conversely, lengthening it raises the pedal.
If the clutch pedal is easy to press but the clutch does not disengage, consider whether the clutch fluid is insufficient. If it's not, you might need to check if the master cylinder is leaking pressure.
The master cylinder provides clutch pressure, or you can adjust the slave cylinder rod; lengthening raises the pedal, shortening lowers it. If the clutch frequently runs low on fluid, consider damage to the slave cylinder. Nowadays, most clutches are self-adjusting. If the clutch slips or won’t engage gears, you can directly consider the clutch disc as the issue.
Previous Page
Previous Page
Focus on the research and development of automotive brake systems and pneumatic brake valves to promote the development of the auto parts industry!
Contact Information
Telephone:86-575-87438928
Mobile:8613252110178
QQ：1185450863@qq.com
Address: No. 461, Advanced Village, Fengqiao Town, Zhuji, Zhejiang Province
Online message
Submit your information and we will contact you as soon as possible.