How to judge whether the brake line is leaking oil or air

When the brakes become stiffer, stop, and feel the brakes to see if they tend to soften. If there is, it means that there is an oil leak or air intake. Hope it helps.

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There is an air leak or there is air, and if you press the brake pedal, the pedal will go down little by little, and you can't press it.

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Under normal circumstances, you step on the brakes a few times before it gets hard and you don't go down. But if there is oil leakage or air leakage, you step on the brake a few times, first become hard and can't move but slowly step on the bottom, that's because of oil leakage, it will slowly remove the pressure of the master pump and the pipeline, so it will not be hard. If there is a serious leak, it will not be hard at all, and there will be no brakes directly.

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How to check for oil leakage When you step on the brakes back and forth in the flameout state, you will feel heavier than one foot If it does not sink, there is no change, but there is an oil leak. The method of checking for air leakage When you step on the brakes in the car state, it will feel very light, which means that there is no air leakage, if it is not light, it means that there is a leak, and look at whether the vacuum tube of the master cylinder is aging. Hope mine can help you.

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Yes, and this situation is very serious, and it will also affect the normal braking of the vehicle after that, and then it may also cause a big accident, and it is easy to have a traffic accident, and the risk is relatively large.

If there is such a problem, there will be a great hidden danger, if there is such a problem, you must go to the repair shop in time to repair the car, because oil leakage is a very dangerous thing.

Yes, there is a very big hidden danger, if this happens, it must be repaired in time to avoid danger.

Brake line leakage can cause brake mistracking.

The main causes of brake misalignment:

1. (Disc brake type) The friction coefficient of the brake disc or brake drum is inconsistent, that is, the vehicle brake deviation caused by the inconsistent braking force on both sides due to the smoothness and roughness on one side.

2. (Air brake type) The diaphragm of the brake chamber is ruptured or the sealing ring of the brake cylinder is damaged, and the brake air pipe or oil pipe is leaking and leaking.

3. The gap between the left and right brake drums and the shoe is inconsistent.

4. (Air brake type) The push rod of the brake air-shock slide chamber is deformed or stuck, or the brake cylinder bites.

5. (Air brake type) The brake camshaft is corroded, the action is not sensitive, and the regulator is damaged.

6. The left and right tire pressure or tire model are inconsistent.

7. A certain brake pad has oil stains.

8. The tension of the return spring of the left and right brakes is different.

9. The brake drum is worn and worn out of round.

10. The hydraulic or pneumatic pressure provided by the brake master cylinder or the tandem double-gun brake valve to the sub-cylinder is inconsistent.

11. The brake hydraulic difference of the load proportional valve distribution is inconsistent.

12. Caused by blockage of brake lines.

13. The ignition position of the four-wheel fixed acacia is inaccurate.

14. Caused by uneven road surface.

15. The frame is not right, so that the front and rear wheels are not parallel.

Fault diagnosis and troubleshooting

When braking is used in driving, the car deviates to the left, which means that the braking performance of the right wheel is poor, and vice versa, the braking performance of the left wheel is poor; After braking and stopping, check the drag mark of the tire on the road surface, and the wheel with short drag mark or no drag mark is the wheel with the brake fault.

After finding out the faulty wheel, first check whether the wheel brake pipeline is leaking, whether the tire pressure is sufficient, if it is normal, check whether the brake clearance meets the regulations, and adjust it when it does not match; At the same time, the air in the wheel cylinder is removed in combination. If it is still invalid, the brake drum should be removed, and each part of the brake should be checked one by one according to the reason, especially the size and accuracy of the brake drum.

If after the above-mentioned maintenance, the drag mark of each wheel basically meets the requirements, but the brake is still misaligned, the fault is not in the braking system, and the technical condition of the frame or front axle should be checked; If there is a deviation from the left to the right, you should check whether there is a negative toe or whether the ball joint pin of the longitudinal and horizontal tie rod is loose.

When braking, the steering wheel does not move, and the car automatically deviates to the left or right, mainly due to the different braking effects of the left and right wheel brakes on the same axle, which makes the car deviate to one side. In addition, uneven tire pressure and loose brake floor will also cause the car brake to deviate.

Precautions for maintenance:

Brake mistracking is a dangerous abnormal braking phenomenon. When driving, once the phenomenon of brake deviation is discovered, the driver should immediately stop for inspection to eliminate the fault. When stopping, use a little force to take the steering wheel in the opposite direction of the deviation, and if the road is narrow or in an emergency, you can use the parking brake to force the car to stop and then carry out maintenance.

(1) Find out the air leakage part of the modern automobile air brake system.

Mostly use double-circuit braking, but there are more valves and pipelines in the system, when the system leakage is small, because the air leakage sound is small, only see the barometer pointer slowly dropping, it is difficult to find the air leakage for a while, in order to find out the air leakage part as soon as possible, the following simple method can be adopted.

Prepare several screw plugs with the same thread diameter and tooth pitch as various tracheal joints, when checking, first remove the gas outlet joint of the gas storage cylinder, replace the corresponding screw plug and tighten it, if the phenomenon of the barometer pointer dropping has been eliminated, it means that the pipeline connected with this joint has air leakage. Then install the joints of the original removed gas storage cylinder, remove the other pipeline joints connected to this joint one by one according to the pipeline connection order, replace them with the corresponding screw plugs and tighten them, and the air leakage part can be found quickly.

When the air leakage is large, you can touch the test with a paper strip or hand along the pipeline, and listen with your ear.

2) Confirm the approximate range of air leakage.

During use, every pipe or joint has the possibility of air leakage. In order to confirm the approximate range of air leakage, the following methods can be used to determine the approximate range.

1) When the barometer indication is zero, in the case of engine operation, step on the brake pedal and release it quickly, if there is a strong deflation sound, it means that the barometer is faulty; If there is no gas release sound, it means that the fault is in the air compressor or transmission belt, the pipeline from the air compressor to the wet air storage cylinder, or the pressure release valve control device is out of order.

2) If there is no problem with the air compressor transmission belt and a section of the air storage cylinder, but the air pressure indication value is low and the inflation speed is slow, the fault will be in the air compressor and the pressure relief valve.

3) If the indication value of the barometer is normal, step on the brake pedal, and check whether there is air leakage from the brake valve to the brake chamber of each wheel; If there is no air leakage and the barometer still has a downward trend, you should check whether there are cracks in the gas reservoir itself and whether there is air leakage in various accessories on the gas reservoir.

4) Start the engine, run at medium speed for a few minutes, and observe whether the barometer reaches the specified value. If the air pressure is insufficient and the air pressure does not drop significantly after the engine is turned off, the fault is in the air compressor (when the belt drive and connecting pipeline are normal).

5) The engine continues to run, and it is difficult to increase the air pressure of the gas reservoir when the brakes are not used. After the engine is turned off, the air pressure continues to drop, and there is air leakage from the air compressor to the air storage cylinder, or from the air storage cylinder to the brake valve pipeline and the brake valve.

6) If the air pressure of the air reservoir is normal and the air pressure continues to drop when stepping on the brake pressure plate, and cannot be maintained within the corresponding indication value, it means that there is air leakage between the brake valve and the pipeline of each brake chamber.

There is no good or bad brake adjustment in the true sense, but here we can say what kind of brake adjustment is more suitable for most people. There are mainly light tail weight of the head, the power is concentrated in the middle rear section, it is easy to grasp the force of the first brake, suitable for driving in the city, the braking force is concentrated in the middle of the rear section, and the greater braking force can be obtained after the first brake is over, so as to reduce the stroke of the brake pedal. The pedal free stroke is set to prevent braking traction from occurring and to fully release the brakes.

When the free stroke is not suitable, you can loosen the lock nut of the master cylinder pusher, loosen the pusher, and change the length to adjust. Tighten the lock nut after adjustment. The free stroke of the Santana saloon brake pedal is the amount of pedal movement when the pushrod touches the brake master cylinder piston when pedaling.

During the inspection, you can gently press down on the pedal with your hand to measure the pedal stroke when the tactile sensation becomes heavier. The competition in the auto parts processing market is becoming increasingly fierce, the concept of environmental protection is deeply rooted in the hearts of the people, the continuous upgrading and application of technology, supporting the auto parts processing system, and the trend of modularization prevails.

There are many types of auto parts, and now there are more and more brands of cars, and there are more and more types of cars. Cars can be divided into two types: sedans and commercial vehicles, which refer to vehicles with passengers as their main purpose. With the improvement of people's living standards, the consumption of automobiles is also increasing, and the market for auto parts is also getting bigger and bigger.

Auto parts manufacturing plants are also growing by leaps and bounds. Brake accessories include vacuum booster, hydraulic brake pump, brake shoe, brake disc, brake component, brake pad, refrigeration compressor, brake fluid, air compressor, brake room, anti-lock braking system, etc.

Electric accessories include universal joints, power transmissions, transmission shafts, reducers, clutches, differentials, transmission gears, transmission shafts, etc. Body accessories include seat belts, awnings, airbags, wipers, upholstery, condensers, covers, sunroofs, air conditioners, car glass, blades, license plates, etc. Electrical appliances include distributors, starters, automotive lighting, spark plugs, wiring harnesses, car audio, sensors, computer boards, cover plates, sunroofs, automotive instruments, generators, electronic fans, punches, speakers, etc.

I don't know where the main pump leaks. If the oil leak is coming from a fitting, it may not be a master cylinder issue, but an assembly issue. The oil leakage pressure in the brake pipe system is very high.

If it is determined that the oil leakage is a uniform trachoma oil leakage, even if the brake is stepped on dozens of times, the brake oil in the brake oil pot will leak out, and the brake master cylinder leaks oil, which may be caused by the poor sealing of the brake master cylinder leather bowl, the poor sealing between the brake oil tank and the brake cylinder, and the sealing problem of the brake oil pipe. For more information, you can also consult the Expert Q&A section of the Vehicle Quality Network or give feedback on your questions.

<> the problem with this mileage should be within the warranty period. As long as it is not caused by external forces, you should go directly to the 4S store to claim for replacement as soon as possible. This problem has a great hidden danger to driving safety.

Don't take it lightly. At 3,500 km, the brake master cylinder leaked. There is no doubt that this is a quality issue.

The brake master cylinder is not a consumable part. Even if you drive millions of kilometers, it probably won't break. When you're running 3,500 km, it's a quality issue.

You can go directly to the 4S shop to apply for free maintenance. Braking performance is very important for vehicle safety. In everyday vehicles, checking the brakes frequently is also a necessary step, but I guess most people are like me – lazy, it's harder to check the vehicle than to wave the numbers.

The brake warning light is shown in the figure below. Under normal circumstances, when we lower the handbrake, it lights up and when we lower the handbrake it turns off. The situation mentioned by the subject certainly does not mean that it lights up when the handbrake is pulled, but it still lights up when the handbrake is lowered.

Since the brake pads gradually become thinner during driving, the pistons in the brake cylinders gradually adjust the clearance of the brake pads due to wear. Secondly, when pressure is applied, the thrust generated by the brake fluid pushes the piston, so the adjusted piston clearance will increase the space inside the brake cylinder. In general, the brake warning light illuminates in three situations:

After normal stopping, the brake warning light must be on; The hand brake will open even if the hand brake is not released during driving; There are also brake system failures, such as brake oil falling below the minimum line, warning that the brake cylinder cannot be returned, etc.

This problem is quite serious, and there are very big hidden dangers, we must repair it in time to avoid the impact on our own life safety.

You can repair the engine of the car, and sell the shed and repair the coolant of the car, it may be that the problem of these two systems has occurred in Xiangling Huying, so it is okay to solve the deficit in this way.

In this case, you must go to the repair shop in time to repair the car, in this case, it must be because of the problem with the car's braking system.

You can repair the brake master cylinder, it may be that there are some problems here, and there will be oil leakage.

If your brake pipe leaks oil when Zhongling waits, be sure to go to the 4S shop to sell a detailed inspection and repair, it is best not to do it privately, to leave some things to professional people to do.

If there is an oil leak, you need to check other parts, especially the engine and gearbox, you also need to check the rotten or rotten hall, and you need to remove these oil stains or replace an engine directly.