What if the truck handbrake is not loose?

There are two situations in which the truck hand brake cannot be released. The first one is that it cannot be loosened because of incorrect operation, and the second one is that there is something wrong with the vehicle itself. The details are as follows: 1, truck handbrake: the handbrake of a truck is different from that of an ordinary car. In some truck models, only by pulling outward and then turning the handle on the handbrake clockwise can the handbrake be released and kept parallel. Due to different vehicle brands, different handbrakes will be different. The specific operation method is suggested to check the vehicle instruction manual, which will be explained in detail. 2. Brake cylinder: Another situation is that there is a problem with the hand brake of the truck itself. The most common reason is that there is a problem with the brake cylinder. The principle of truck braking is generally that after the brake is stepped on, the master cylinder generates thrust to push the hydraulic oil pressure to the brake cylinder, and the piston inside the brake cylinder starts to move by hydraulic pressure to push the brake pad. So as to brake the vehicle.