Share some vehicle repair and maintenance cases from time to time. Let more people know some tips in daily car use, maintenance and testing. Know more about cars with cars!
The normal operation of the braking system plays an important role in daily use. Think about the consequences of brake failure when the car is driving at high speed.
Audi A8L 2012 model, 10W km change front and rear brake disc (brake disc).
As soon as the vehicle arrives at the store, the first step is to check the appearance of the whole car, whether there are serious bumps, invisible bumps, etc., vehicle fuel gauge, mileage, vehicle information, etc., to facilitate maintenance records query.
The second step is to lay a four-piece set before entering the cab: seat cushion, foot cushion, gear handle cover, steering wheel cover.
In many cases, maintenance technicians need to enter the cab to call vehicle information and so on. Without any protective measures, it is easy to bring some oil into the cab and rub the seats, foot mats, handlebars, steering wheels and so on with oil.
Under normal circumstances, when the car enters the station, if you need to open the engine cover, you need to lay leaf cloth, in order to avoid some oil falling, and so on. This is for the replacement of the brake disc, there is no need to open the engine cover and there is no need for leaf sheet cloth.
The last time the car was maintained, it was checked that the thickness of the brake disc had reached the critical point and lasted another maintenance cycle. recently, the brakes began to wobble, the braking effect decreased, and one foot had to glide for some distance.
The car enters the hoist station, loosens the tire bolts, rises a section and takes off the tires.
To change the brake disc, you need to pay attention to how to identify the authentic product, deputy factory. The brake disc produced by regular manufacturers has relatively clear packaging and printing, with license number, implementation standard, etc., while there is a certificate, production batch number, production date and so on in the package. The use of reliable quality brake disc can guarantee its service life of 8-120000 km. If fake or inferior brake discs are used, braking efficiency can be produced in a short time, but in the long term, the brake discs are easily deformed because of the high temperature caused by friction, which reduces the braking effect and ultimately affects driving safety.
It was observed that the brake disc was uneven, and one circle on the edge was higher than the other places, but it was difficult to judge with the eyes whether his limit had been reached.
So here we use the measuring tool, the Vernier caliper, to measure the thickness of the brake disc by clamping the front part of the caliper on both sides.
The limit for the use of the front wheel is 32mm. (this 32MM is not my nonsense. There are printed characters in the inner ring of the automatic disc. If you want to check your car’s brakes, you can try to find them.) the measured data below 32MM indicates that the brake disc needs to be replaced.
This layer of packaging of the new brake disc looks very high-end, is this layer of plastic packaging will charge you dozens more!
What the new disk looks like after opening the outer layer of plastic.
There are bright spots. Let’s take a look.
Install the new brake disc after polishing.
There are several points that you should pay attention to during installation, that is, the installation sequence and torque of these bolts.
You must use a torque wrench, 1455, which is the only test of your professionalism.
Each bolt has its own way of tightening and torque requirements, do not use ignorance as an interface.
In the final stage, after changing the disk, I went out for a test drive and drove 20 kilometers with good brakes. If you want to achieve the perfect braking effect, you still need to run a salary of one or two million to run-in. Today, I only came back from a 20-kilometer run and handed in the car after washing the car in the drive area.
MandyIsabel 
5 
September 17, 2024 
