1. Remove the guard plate and disassemble the half shaft screw. Use a flat-blade screwdriver to gently pry it down along the circumference of the guard plate, and you can see the semi-axle wire, with edges, blocked by the "pin". The pin can prevent the tightened screw from coming off, so the pin cannot be ignored and cannot be removed and cannot be removed! If you forcibly disassemble the half-shaft wire when removing the half-shaft, it is easy to bite the screw and "slip" and hurt your hand.
Tips: Find the T-shaped steel bar, align it with the edge of the half-shaft screw, tap it a few times, then take out the spring washer in it, twist the half-shaft screw parallel to the half-shaft, and tap it with a parallel hammer. At this time, the brake "socket" will move slightly, and it will be removed as soon as it is lifted by hand.
2. Remove the old brake pads and check the brake discs and rocker arms. The brake pads are easy to disassemble and take, and they will fall off when you buckle outwards with your hands. Whether the brake rocker arm is flexible under shaking with your hands and cannot swing is likely to be rusty.
Tips: Take off the rocker arm. Do not use a hammer to smash it with brute force when removing the rocker arm. It is more dexterous to spray and rotate with rust remover. Check whether the brake disc feels uneven.
3. Replace with new brake pads. When installing new brake pads, it is best to apply proper grease to the fixed column, rocker arm swing and brake block spring to make it more flexible. Remember that no oil can get on the brake pads, otherwise the brakes will not stop or the brakes will make strange noises. It will also reduce friction.
Tips: The tension spring of the new brake pad is best to be clamped with pliers to prevent the spring from falling off the groove. When installing, the tension spring of the new brake pad can be in place by 90° in the middle. Then swallow the brake into the brake disc, align the key with the keyway and install it in place. Tighten the spring washer and the half-shaft wire. When the half-shaft screw is not tight, it is best to use a T-shaped steel bar to align the half-shaft wire with a hammer. After a few vibrations, make the screw tighten, and then the pin is pinned, and the thread will fall off easily and cause an accident.
4. Check the brake lever and step on the brake lever. Check whether the brake lever has slippage, whether the spring of the brake lever is elastic enough, and whether the brake screw "eats" the brake lever spring. Some brake lever springs extend into the brake wire, which makes it difficult to tighten and retreat. At this time, it is best to use a suitable flat cushion to block the spring wire from entering the brake screw. If the screw pattern is damaged, replace the brake lever!
Tips: The brakes can't be stepped on, and the brakes can be stepped on, so that the force is strong or rusty, and the stepping rod is prone to cracks or deformation. After inspection, adjust the brakes on both sides to keep the brake distances on both sides as consistent as possible to prevent partial brakes.
