Chengdu Volkswagen automobile maintenance knowledge

According to the mileage, every 7,500 kilometers and 30,000 kilometers are a cycle, that is, the maintenance is divided into four maintenance contents: 7,500 kilometers maintenance,10.5 million kilometers maintenance, 22,500 kilometers maintenance and 30,000 kilometers maintenance. Among them, there are many first 7500km maintenance (also called first insurance) projects.

Knowledge of Volkswagen maintenance II.

Correct tire pressure original tires, tires will affect fuel consumption because of insufficient inflation. When the tire pressure is too low, the contact area between the tire and the ground will increase, which will make the driving resistance greater and the vehicle will naturally waste more oil. Of course, if the owner fills Dachuan with tire pressure to replace the narrow tire, it will increase the possibility of puncture and eccentric tire wear and reduce driving comfort.

Volkswagen maintenance knowledge III.

Do not add engine oil additives. Engine oil is a compound formula (antioxidant, viscosity improver, defoamer and antiwear agent) added by base oil.

( JIAZHAO.COM )

Car maintenance is essential for a car, so do you know the maintenance rules of Chery A 1 brake system? Wang Chang I specially visited experts in the automobile maintenance industry and got professional answers, which are arranged as follows:

For the automobile braking system, only regular maintenance can ensure the normal operation of the braking system, and then ensure the driving safety. The braking system of cars and minivans mainly uses brake oil to transmit braking force, while large buses and heavy trucks use pneumatic braking system. Different brake systems also have different maintenance methods.

Working principle of braking system

First, regardless of any braking system, it is the brake pad (disc type) or brake shoe (drum type) that ultimately plays a braking role, so it is necessary to regularly check the thickness of the brake pad or brake shoe. When it is found that its thickness is close to or less than the minimum thickness specified by the manufacturer, it should be replaced immediately. When checking the brake pads, check the wear of the brake disc or drum. If the contact surface is dented, the brake disc or drum should be used in time to ensure the contact area with the brake pad and improve the braking force.

Second, the oil brake car, check the brake oil level before the car. If the oil level drops, immediately check the brake oil circuit for any leakage. Brake oil will fail after a long time, because it will absorb moisture in the air. Change the brake oil regularly according to the manufacturer's regulations. It is best to replace it once a year.

Third, for the pneumatic brake system, pay attention to regularly drain the accumulated water in the system and replace the dryer regularly. The moisture in the pneumatic system will corrode the pipeline, affect the braking effect, and even lead to the failure of the braking system in serious cases. In addition, it is necessary to regularly check the working condition of the air pump and the wear of the air pump belt, and replace it in time when problems are found.

Brake pad replacement cycle

Usually we will judge whether the brake warning light on the dashboard is on or not as the basis for replacing the brake shoes, but this is the final bottom line. If we change it at this time, it will be quite dangerous. Although all vehicles have this alarm system, some directly sense the thickness of the brake shoes, and some light up the alarm lights when the brake shoes are completely worn and the brake fluid drops extremely. If it is the latter, when the warning light is on, the metal base of the brake pad and the brake disc are already in a state of iron grinding. At this point, a bright iron mark will be seen near the rim edge of the tire. Therefore, every time you enter the factory for maintenance, you should check whether the brake pads can be used, and replace the brake pads as soon as possible when the service life is approaching, instead of just trusting the warning lights.

It is very important to check the brake fluid level regularly.

Daily maintenance of braking system

Clean and high-quality brake fluid is the basis of safe and good working condition of brake system, so you should buy the best quality brake fluid on the market. If the brake fluid is dirty, empty and flush the whole system, and then fill the master cylinder with new brake fluid. Do not reuse brake oil. All brake fluid discharged from the system should be discarded. In the project of maintaining the brake system, it is most important to check the brake fluid level regularly. Check it at least once a month, and the more times the better. Inhaling asbestos dust is very harmful to your health. When using dry brush or compressed air to remove dust and dirt from the braking system, it will raise dust, which is easy to damage health because it is easy to contain asbestos fibers. Dust and dirt should be treated with a vacuum cleaner specially designed to remove asbestos, and dust-proof mode should be used. If there is no vacuum cleaner, the brake assembly should be kept in a well-ventilated place and wear an approved respirator.

Before checking the brake, please carefully wipe off the dust on the master cylinder to prevent the dust from falling into the oil storage tank. Remove fasteners (usually pins) and covers. For the graduated measuring cylinder, keep the liquid level 6 mm from the top of the measuring cylinder. If there is a scale, just keep the liquid level above the scale. If the master cylinder needs to be refueled, please add heavy-duty brake oil meeting dot3 or 4 specifications. Be careful not to apply brake fluid to the paint, because it is very corrosive and will destroy the top coat.

If the brake oil is always insufficient for a long time and you keep adding it, it is obvious that there is something wrong with your brake system and it should be checked. The color of the brake oil will also give a warning. Brake oil should not be too dark or burnt. If so, there is a problem, but this will not happen often.

Eight Skills of Perfect Braking

Anyone can drive faster. But if you can't operate the brakes correctly, the car may become the murder weapon of the accident in an instant. Therefore, perhaps we can say that braking technology is one of the realms of driving a car. Here are eight kinds of braking skills for everyone. If you have mastered everything, you can say that you are familiar with the brakes.

1. Long distance light braking. Skilled braking skills do not give passengers a sense of shock, provided that the road ahead and traffic conditions are correctly grasped. Release the accelerator pedal first, and then brake according to the distance and speed.

2. Before the vehicle comes to a complete stop, release the brake once. If the purpose of braking is to stop the vehicle, it will have a great impact immediately until the vehicle stops running. The trick is to release the brakes once before the vehicle stops completely, and then brake gently until the vehicle stops.

3. In case of emergency braking, apply force to step on the brake pedal. Most vehicles 20 years ago did not have ABS devices. Therefore, it is not recommended to step on the brakes once, but to step on the brakes twice separately to prevent the wheels from swinging and locking in the direction after locking. But now the ABS system is the standard configuration of the vehicle, so you must fully step on the brake pedal in case of emergency.

4. It is still dangerous to brake on dirt roads or quicksand roads, not only on rural roads, but also on urban asphalt roads. Due to urban construction, some floating soil or sand will accumulate on both sides of the road, so it is necessary to use emergency braking carefully.

⑤ Use the emergency brake carefully when driving in rainy days. Although vehicles are basically equipped with ABS system now, the phenomenon of wheel locking has been greatly improved. It is suggested that when driving in rainy days, pay attention to controlling the speed and use emergency braking carefully.

6. If the engine is used for braking when driving on a long downhill road for a long time, the braking system will be affected by heat. Therefore, according to the road conditions, the gear of the gearbox can be selected as 3rd gear, 2nd gear, L gear (automatic wave) or 3rd gear, 2nd gear, 1 gear (hand wave), and the speed can be controlled by engine braking without stepping on the accelerator.

⑦. Pay attention to the operation method of braking when turning. When braking in the direction, the vehicle is easy to lose its center of gravity, and the speed should be fully reduced by braking before entering the corner. But if it is too late to slow down, you can use the brakes briefly according to the situation. If the wet curved road brakes suddenly, it is easy to flick the tail. You can slow down by lowering the gear of the gearbox and using the engine brake.