How to exclude air from electric bicycle disc brakes?

Disc brake, also known as disc brake, consists of a brake disc connected to the wheel and a brake caliper on the edge of the disc. The braking principle is that the high pressure brake oil pushes the brake block to clamp the brake disc to produce a braking effect. Disc brake is also known as disc brake, disc brake disc through the hydraulic pump to push the brake caliper, grip the brake disc, in order to improve the braking force, according to the F = P * S formula, generally will be used to increase the brake area approach to increase the brake contact surface. tesgo industrial design company can also be through the extension of the brake force arm approach. There is also a way to increase the brake force by amplifying the pressure of the hydraulic pump and increasing the diameter of the brake disc to increase the brake torque.
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I. Disc brake air discharge methods.
1, how to exhaust air, refueling: add enough brake night to the oil storage cup, repeatedly grab the brake handle (5-6) times. Squeeze the bottom without letting go, then release the brake oil release bolt (remember to open the small rubber cap), let the brake fluid and air flow out point, pay attention to the flow of liquid, feel no air bubbles after tightening the bolt, and then repeatedly hold the brake handle, until you feel strong after not letting go. The other hand loosen the oil release bolt, let the oil and air spray out together, then tighten the oil release bolt, and then put the hand that holds the brake handle (the order can not be reversed), repeat several times until the release of air (brake fluid bubbles with pressure and no broken knot that air exhaust). Note: need to pay attention to the brake fluid level in the reservoir cup can not be too low.

2, brake noise. Normal hydraulic disc brake system also exists a slight friction sound, but if the sound is relatively large indicates that there is a fault, usually caused by the following reasons.
Brake pads are seriously worn, the friction pads have been worn out, metal pads and brake disc friction will produce the "rub" "rub" sound. The brake pads should be replaced. The brake disc is uneven, the brake disc has been hit and has warped parts, which will swing during the rotation and rub the brake pads, resulting in a noise. You can confirm by rotating the wheel to observe the amount of brake disc oscillation, the amount of oscillation exceeds 0.5mm and the brake disc should be replaced. Missing or no elasticity of the shrapnel will cause the brake pads to hit back and forth in the slot and produce noise. The brake pads can be replaced or repaired. The brake does not return will also have a large friction sound, can install the brake does not return fault to deal with. Dissipate heat and optimize thermal decay.
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3. The brake does not return. After releasing the brake handle, turning the wheel is still very hard may be caused by the following reasons.
The upper pump plunger does not return, caused by the seal expansion is too tight or the plunger and plunger hole rust, the plunger can not be popped out or popped out too slowly after pressing and releasing. The upper pump assembly should be replaced. The combination of the brake handle and plunger is too tight, the plunger can not be fully returned, the fluid can not be returned, always in the brake state, usually caused by the replacement of the brake handle is not suitable, you can polish the combination of the brake handle and plunger some. The brake fluid pipe is blocked and the fluid return is obstructed or the piston of the lower pump is severely corroded and too tight, which makes it inappropriate to return. The brake fluid pipe can be replaced or the lower pump piston can be removed for lubrication and cleaning. The pump body of the lower pump and the pump body bracket are rusted, and the pump body cannot move axially along the bracket. Under normal circumstances, there is a slight amount of activity between the pump body and the bracket. In this case, the pump body and the bracket can be decomposed after the rust lubrication treatment.
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4、The rear wheel is stuck. In this case, you need to open the exhaust air of the lower pump to see the outflow of oil. If the oil sprays out after opening, while the rear wheel becomes lighter, it means that it is a pressure problem and the fault may appear in the upper pump and oil pipe problem; if the oil flows out slowly after opening, the rear wheel is still heavy, it means that it is a mechanical problem of the lower pump. The brakes do not work or there is no brake. The cause of this fault is insufficient brake fluid or gas in the pump, you need to add brake fluid or deflate according to the specific reasons (deflation method: loosen the deflation screw, slowly squeeze the gate handle, while you can see bubbles coming out from the deflation hole, then tighten the deflation screw first, then release the gate handle, and repeat until there are no bubbles.
tsego Industrial Design reminds that it should be noted that the bleeding also needs to be done at the screw where the upper pump is connected to the brake fluid pipe. In individual cases, the mixed brake fluid will generate gas and compounds during the process of placing the vehicle, which will easily block the small inlet hole in the oil pool.
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Disc brake maintenance
Check if the brake fluid is leaking. If it is leaking, wipe the leaking brake fluid and go to a repair store to find out the cause and repair it in time. Check whether there is mud at the brake caliper, if there is, clean it up to prevent mud from causing the brake cylinder and friction pad not to return, thus affecting the braking effect and the life of the brake system. Regularly replace the brake fluid. Regularly to the maintenance station to check to determine whether the brake fluid level is lower than the minimum line, check the friction pads and brake disc wear conditions.

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