The braking system is one of the most important automotive safety parts, once the car's brake system failure, the consequences would be disastrous. If you encounter a car braking system failure can overhaul newspaper automotive repair consultant Mr. Liu Weapon:
Performing or failure of a brake
1. (Joints) of the brake pipe leakage or obstruction, brake fluid, brake hydraulic failure of decline. Should regularly check the brake pipe, repairing leaks, add brake fluid to clear the pipe.
2 brake pipe into the air to brake slowly, brake pipe heat pipe within the residual pressure is too low, resulting in brake fluid gasification, air bubbles in the pipeline. Compressible gas, and thus lead to brake torque down the brake. Maintenance drain the air brake wheel cylinders and tubes and add a little brake fluid.
3. Improper brake clearance. Brake lining face with the inner wall of the brake drum face the gap is too large, too large brake wheel cylinder piston stroke, resulting in brake slowly, brake torque down. Maintenance specification fully adjustable brake clearance struck ratchet with a flathead screwdriver from the high-speed hole, the brake shoe is fully open to eliminate the gap, and then ratchet back 3 to 6 teeth to the specification of the gap.
Brake drum and friction linings poor contact, the brake shoe deformed or brake drum roundness than 0.5mm, causing friction linings poor contact with the brake drum, brake friction torque down. If this phenomenon is found to be boring or the whole school to repair. Brake drum boring diameter shall not be greater than 220mm, otherwise it should be replaced with new parts.
The brake lining grease contamination or soaking wet, friction coefficient drastically reduced, causing Zhidongshiling. Maintenance, remove the friction plate clean with gasoline, and blowtorch heat baking, to penetrate the film of oil oozed oil leaking severely punished must be replaced when the new film. Continuous braking friction plate of flooding can be used to make the water evaporate to produce heat, and can restore its coefficient of friction.
Brake Master Cylinder sleeves (or other) damage, brake lines can not produce the necessary internal pressure, fluid leakage, resulting in poor braking. Should promptly be overhauled brake master cylinder, wheel cylinder sleeves, replacement of damaged parts abrasion.
2 brake "deviation"
Both sides of the brake time 1. Coaxial inconsistent most of both sides of the brake clearance uneven or caused by the differences in the contact area, the first contact with the brake drum brake brake friction plate side, while on the other side of the gap due large friction and brake drum contact hysteresis brake is not synchronized. If this phenomenon, according to specifications to re-adjust the left and right wheel brake clearance.
Coaxial both sides of the brake, brake torque, resulting in a different vehicle speed, driving straight from the people not equal, resulting in unilateral braking. This is usually due to a side brake wheel cylinders oil spills, and heavily oiled brake lining, motorcycle coefficient differences or around the tire air pressure ranging caused. Available gasoline cleaning friction plate, high-speed tire pressure, repair leaks, were to be excluded.
The car does not depress the brake plate on automatic slide to one side. This is more for the side of the deformation of the front suspension, underbody deformation of the front suspension, front suspension coil spring elastic serious decline, frame and other parts in the automotive brake mutual interference or co-ordination. In which case, be restored to identify the reasons.
4 wheel braking turn to the side of the deviation. This is mainly caused both sides of the brake drum and friction work piece surface roughness, or the side of the brake pipe connector to plug into the air. Should find the root cause, to be repaired.
The left, the right tire pressure caused by uneven from the partial. About tire inflation must be consistent, otherwise both sides of the wheel turning radius, driving straight at varying distances from sliding around. Must be in accordance with the provisions of the standard to the tire inflated.
6 In addition to the above reasons, as well as inaccurate wheel alignment and tire wear different road thus face of the resistance of the left and right wheels also cause deviation sideslip. If this happens, identify the reasons to adjust or replace the parts according to specifications, respectively.
3 brake drum fever
1. Brake gap is too large, too small pedal free travel, loosen the brake pedal, the braking force is not completely lifted, so that a the friction pairs long time in the friction state; difficult start driving weakness, stroking the surface of the drum was hot . In this case, should be re-regulate high-speed braking gap can be.
Brake lever is not fully liberalized, the reason is on the high-speed operation or negligence, resulting in a long time in the friction pair friction state of fever, high speed necessary specifications.
The heat generated by braking the return spring thermal deformation of elastic decline or disappear, brake lining assembly can not guarantee timely return will not be able to timely and completely remove the brake leaving the brake drum fever. Timely repair or replacement of the return spring, you can eliminate the fault. Five the parking Zhidongshiling common cable or jacket rust, traction spring break, fall off or disappear bomb pregnant, leading to the parking brake cables or brake cable pull is not flexible in his jacket, which the hand brake Pine does not open lapse work. Should check that the brake control cables and brake system components surface without injury, the handle is flexible maneuvers, cable wiring, cable connector and fixed parts are loose damage. Lubrication, maintenance, cable lubrication or replacement of defective parts, re-repair specification, high-speed brake handle the amount of rotation. (Lee Heron)