Why is the brake of Great Wall H6 so hard?
3 Answers
The reason for the brake becoming hard may be a malfunction of the vacuum booster pump or air leakage in the booster pump pipe. In this case, if you notice this before driving, it is safer not to continue driving and send the car directly to a repair shop for inspection. If you notice this while driving, do not panic. The first thing to do is to slow down and stop. You can try pressing the pedal several times to see if the braking can be restored. Usually, stepping hard can still exert braking force. Below is an introduction to Haval cars: 1. Sales: As of September 2019, the main model Haval H6 achieved the first place in SUV sales for 76 consecutive months. As the successor to the Great Wall Safe, Haval plays a connecting role in Great Wall's SUV products. 2. H Series Products: The H series products include Haval H2s, Haval H2, Haval H4, Haval H5, Haval H6, Haval H6 Coupe, Haval H7, and Haval H9.
Oh dear, I also experienced the brake pedal becoming stiff when driving my Haval H6 on the highway recently - it gave me quite a scare! The pedal required significantly more effort to depress with noticeably increased feedback force, which usually indicates an issue with the brake booster system. The most common causes are vacuum booster pump air leaks or aging/cracked vacuum hoses leading to insufficient engine vacuum supply. It could also be due to seized master cylinder pistons or air bubbles in the brake fluid lines affecting hydraulic pressure transmission. If the symptom is particularly noticeable upon cold start, check whether the check valve is clogged. When I took mine to the repair shop, the mechanic diagnosed it as a loose vacuum hose connection - replacing the hose restored normal operation. I'd advise anyone encountering this situation not to force the vehicle to continue driving; instead, pull over immediately to check brake fluid levels and inspect hose conditions.
Last week, while helping my cousin inspect his Haval H6, we encountered a brake pedal stiffness issue. From a mechanical perspective, Great Wall's braking system primarily relies on vacuum boost to amplify the pedal force. Once the boost fails, the pedal becomes exceptionally hard to press. During inspection, we noticed the brake fluid had turned dark and viscous, likely due to degraded flow properties from prolonged lack of replacement. Upon removing the wheels, we found torn dust boots on the brake calipers, allowing dirt ingress that jammed the pistons - improper retraction also contributes to pedal rigidity. Another detail: if aftermarket calipers were installed without proper air bleeding, or if the vacuum booster diaphragm is punctured causing insufficient system pressure, similar symptoms occur. We recommend changing brake fluid biennially and prioritizing vacuum hose and master cylinder checks when issues arise.
