Support bulkhead: description, features and device
All car systems are importantcomponents for comfortable and safe movement. However, the braking system deserves increased attention, since it depends on how safe the vehicle will be. And its main component is the support, which from time to time comes into disrepair. Due to the malfunction of this mechanism, it is impossible to stop the vehicle in time. And only a bulkhead support can solve the problem.
The braking system is represented by severaldetails, but the key role is assigned to him. It is worth considering this component in more detail, to find out what the main causes of the failure of the entire brake system can be.
Cars are usually equipped with disk ordrum brakes. At the same time the caliper is just installed on the disk brake system, while the other uses a drum. Each of the systems has its advantages and disadvantages.
The following points can be considered as minuses of drum brakes:
- The brake drum expands when heated, which requires considerable effort.
- When the car slows down, there is a possibility of formation of gases that play the role of lubricant, which is very critical and unacceptable for the brake system.
- The drum structure is prone to "sticking", as a result of which the wheels are constantly in the "braking" mode.
Many manufacturers tried at least somehoweliminate these shortcomings or at least reduce them to a minimum. In the end, it became clear that the best solution would be to replace them with a disc brake design. However, small cars of budget equipment continue to be equipped with drum brakes, but only the rear wheels, and in front are already disk.
An essential advantage of the drum system can be considered a low cost in comparison with analogues. In addition, they are in the rear of the car, less exposed to contamination.
The disk brake system has many advantagesmore, which everyone knows, who has at least once engaged in a bulkhead bulkhead. And if the drum brakes are a closed type of construction, then, on the contrary, everything is open. Between the brake pads and the disk passes air, which allows cooling the entire mechanism. And thanks to the through holes and special notches on the disc, its contamination is excluded. It is because of the closure that the drum brakes "stick", but with respect to the disk structure, this defect simply does not exist.
Unfortunately, nothing in our world is perfect,including disc brakes. And above all, the main drawback lies in the high cost. Openness also plays a bad joke, because because of this, discs are subjected to external mechanical influences (dirt, sand, dust), which results in scratches.
Brake caliper types
The most common brake caliper system are;
- fixed design;
- calipers with floating head.
Fixed mechanismsappeared before their opponents. And a bulkhead of a support of this type is not difficult. Their design was a metal case with cylinders located opposite each other and in the immediate vicinity of the brake disc. The mechanism is fixed to the suspension system (rotary knuckle) and is constantly in the fixed position.
When the pads are not engaged, then theyare held by special springs. But as soon as the driver presses the brake pedal, they press against the disc. Effective work is provided by a system of hoses, pipes and special tubes, through which the brake fluid is supplied to all cylinders at the same time.
The fixed design of the brake caliperideal for all cars with powerful motors that can develop a great torque. In particular, these are models of the representative class and racing cars. Such mechanisms are produced by world famous companies, for example Brembo.
Calipers with floating bracketdiffer in that in their design one of theThe brake pads are fixed, which can be seen during the bulkhead bulkhead, which is fixed on the inside of each wheel. In addition to the cylinder, the construction includes a bracket and a piston (one or two). When braking, the piston begins to press the shoe to the disc, after a while the floating brace moves to the piston along the guides. This makes use of the second brake shoe.
This design is inexpensive in price and at its modest size is applied to inexpensive cars with a simple bundle.
Principle of operation
The main task, which is assigned to the support, -this is to ensure the necessary effort to slow down or stop the vehicle. Each time the driver presses the brake pedal in the highway, a certain pressure is created. It is transferred to the caliper pistons, which, in turn, use the pads. In this case, the mechanism ensures a strictly parallel movement of the shoes relative to the brake disc. As a result, the parts tightly compress the disc, which leads to slow motion.
But there is one key point about whichyou should know before moving on to the bulkhead bulkhead, this is friction. Since the pads clamp the rotating disc, heating can not be avoided. And this applies to the pads themselves and to the support. The temperature of the brake fluid is also increased. This circumstance confronts many manufacturers with the fulfillment of serious requirements.
First of all, the calipers must be made of a material that:
- has high strength;
- has a high degree of heat transfer;
- resistant to heat.
The last point is especially important, since heating usually leads to deformation of objects.
Diagnosis, main signs and causes of breakage
During the operation of the car,natural wear of the brake system components. And the first sign that she needs a timely inspection, can serve as the appearance of a very unpleasant for most drivers of creaking. Most often this indicates a malfunction of the support. In this case, the brake pads do not touch the disc in parallel, which leads to uneven erasure.
A list of other characteristics, which may require a bulkhead brake bulkhead:
- Significant efforts that must be applied to the driver to completely stop the car.
- When the vehicle slows down, the car starts steadily to the side.
- The brake pedal is pressed too easily.
- There is a pulsation of the pedal.
- The brakes are caught.
What can be the cause of this behavior?support? In most cases, this occurs through the fault of the leaky anther, which causes dirt and dust to get inside. And because of the lack of lubrication, rust appears.
A defective car is considered unsafe, andA car with faulty brakes is already a serious danger to other road users. And if any signs of wear of the brake system have crept in, it is necessary to immediately eliminate them, and not ignore them.
For this it is sufficient with a certain intervaltime to conduct a visual inspection of all the elements of the brake system and to rearrange the rear calipers "Audi" or any other car. You can do this yourself or periodically driving the car to the SRT for the purpose of scheduled inspection.
As for the gap itself, it follows thatcarry out diagnostics every 30-40 days. During the visual inspection, special attention should be paid to the condition of all rubber seals. If there are small gaps, eliminate the trouble in time, since contamination gets to premature wear of the parts.
Maintenance of brake system
In order to be able to make a carcomfortable and safe trips, it is necessary that the braking system is always in good condition. To do this, it is enough to perform maintenance of all its parts.
To care for the support it is necessarydismantle, disassemble and lubricate all the driving elements. There is nothing super complicated in this, nevertheless only a few are engaged in a bulkhead of Nissan's support.
If the driver regularly drives a car,there is a need for a complete replacement of the brake fluid. You can do this every two years. This is due to the fact that the liquid during the operation of the car can attract moisture, because of which the efficiency of the brake system drops significantly.
If a visual inspection reveals a liquid streak, the problem should be rectified immediately. So you can avoid serious damage to the entire system and at the same time protect yourself and others.
Brake pads also deserve attentionobvious wear is immediately replaced. The products of many manufacturers are distinguished by a high degree of safety and quality. In addition, they are made in such a way that the pads signal to the owner about their technical condition.
To facilitate the bulkhead of the Lacetti support, there are specially designed repair kits. In fact, this is a set of small and spare parts. As a rule, it consists of:
- sealing rings;
- adjusting screws;
- adjusting devices;
Depending on the brand of the machine and the manufacturer of the kit, other elements can go to the composition, but the listed components are a standard set of almost any repair kit.
It is worth noting that the device of the front andrear caliper of one machine is different. That is, you will have to purchase two sets. In this case, it is worth choosing the option that best suits the car according to its documentation.
Maintenance of front calipers
It is more convenient to carry out the work on a lift orto use a jack. The front part of the car is raised and the wheel is removed. Next, unscrew the lower mounting bolt and then flip up the body. Carrying out a bulkhead of the rear calipers "Audi C4", it is worth to assess the condition of the pads and, if necessary, replace them.
Then you need to unscrew the upper mount, the hosewhile you can not shoot. Then unscrew the bolts that hold the caliper bracket on the fist. After removing the clamp, you can proceed to extract the piston. To do this, press the brake pedal - the pressure will do the rest. It should immediately clog the brake line, for example a bolt M12.
It is necessary to completely disassemble the support and clean itfrom dirt and lubricate what is needed. In the process of maintenance use the purchased repair kit for your car. All damaged parts are replaced with new ones, and in the end the mechanism is assembled in the reverse order.
Maintenance of rear calipers
The device of the rear supports is slightly different fromFront, as the rear wheels are connected to the handbrake. Raising the back of the car, remove both wheels. The cable of the hand brake must be disconnected, the same applies to the cotter pin that connects the handbrake mechanism and the caliper.
During the bulkhead of the caliper "Audi A6" you need to immediatelyto muffle a brake highway (the same method approaches) and to unscrew fixing elements of a support. Access to the pads is opened, which should be carefully inspected.
The brakes are held by bolts,bolted to the suspension arm. We remove them, too, and also the bracket itself, together with the locks and guides. In this support the piston can be removed with pliers or narrow nose pliers. Further the same actions - an estimation of a condition of details, replacement of sealants if necessary, greasing, whether there is a leak. After that, the support is assembled in the reverse order, without forgetting to put the wheels.
Since the brake fluid will still spill,It is necessary to check its level in the system and top up, if necessary. It is also mandatory to bleed the brakes. All work is not difficult, and you can manage on your own. Only carry out maintenance costs when the planned operation for the replacement of brake pads.