Owners of classic AvtoVAZ models are well aware that the brakes on these cars always left much to be desired, including on the Seven. The situation can be improved. To do this, set the rear disc brakes on the VAZ-2107. The effectiveness of these systems is known to everyone. Therefore, very often, car owners change drum devices to their disk counterparts.
The procedure can be done independently. But it must be borne in mind that the process is quite laborious. In addition, this operation will require the availability of special equipment. But for the owners of the "classics" nothing is impossible.
Tips & Tricks
The rear disc brakes on the VAZ-2107 are more effective. That is why, after mounting them on the rear wheel pair, you will need to additionally adjust the pressure in the brake circuit. If this is not done, then it will turn on much earlier than the front. This can cause skidding. For installation, it will be necessary to carry out welding, as well as milling and turning operations. It must be borne in mind that a car in which such design changes are made will not be able to pass inspection. It should also be borne in mind that any intervention in the brake system of the car is a rather dangerous event. If there is no confidence in the availability of appropriate skills, then it is better to leave the idea to install disc brakes on a VAZ yourself and entrust this task to professionals.
The advantages of such a solution for the VAZ-2107
If all work on replacing drum elements with their disc counterparts was carried out efficiently and professionally, then the performance of the system will improve significantly. Among the advantages of such a refinement, high braking performance can be distinguished.
If you improve the ventilation of the disks, this will ensure the reliability of the system during heavy use. On disk brakes, unlike their drum counterparts, moisture does not accumulate. It significantly affects the efficiency of the braking process. In winter, the brakes can “catch” because of it. The rear axle will lock.
Necessary equipment and devices
To install disc brakes on the rear axle of the VAZ-2107, you will need some equipment. These are half shafts in the amount of two pieces complete with retaining rings, oil seals, as well as bearings. Still worth buying or getting calipers and wheels from the VAZ-2108. But you can use other kits. You will need fasteners. These are bolts for mounting calipers, various washers and nuts, clamps. Spacers for front wheels and brackets for mounting calipers are also purchased. Similar parts need to be made individually.
About the brake master cylinder
The system first needs to be slightly modified. You can do this with a small budget or purchase expensive components - calipers and pressure regulators. But first of all, it will be necessary to replace the master cylinder. The pressure that he can create is not very strong. And its reliability is not very good.
Finalization of the front
How is rear brake rework? Disk (VAZ-2107) devices imply refinement of the front contour. It is hoped that the car after all the alterations will ride on 14 or 15-inch wheels. Perhaps this is out of the budget and may seem unnecessary to someone. However, this is not only for aesthetic reasons. The refinement is related to the stability and controllability of the car. The best option in this case is to replace the standard front products with a set of front brakes from the VAZ-2112. This kit is suitable for 14-inch wheels.
In addition, the disks in this case are ventilated. You can pick up another set of rear disc brakes on the VAZ-2107. As for the calipers, they install standard elements from the same VAZ-2112. Drives can be purchased at ATE or any other discretion. But ATE products are ventilated and have grooves. These wheels fit perfectly on the front hub without additional modifications. To install this kit, you will need to perform some calculations and order (or make it yourself) a caliper mount. Regular for some reason will not work. The support for the caliper should have a thickness of not more than 5-7 millimeters. It is best made from durable steel or titanium. On sale you can search for finished products. A pair of such mounts will cost $ 50.
About rear brakes: what to buy?
Previously, the FIAT-124 had disc brakes at the rear, however, when the model began to be produced already on domestic conveyors, they decided to abandon them for a number of reasons. Let's see what else is needed to go to the rear disc brakes on the VAZ-2107. First of all, you need to purchase a set of brakes from the ATE brand. But you can also buy a more expensive version. This is Power Disk from the same brand. Although it is not much different in efficiency from cheaper analogues.
Installing rear disc brakes on the VAZ-2107 requires grooving the rear axle shaft to the seating dimensions of the discs. It is better to order this operation at some factories or private industrial enterprises. This approach guarantees high accuracy at relatively low cost. Just as in the case of the front brakes, you will need to calculate and make abnormal adapters for attaching the rear caliper. There is an opinion that the same adapters are suitable as on the front wheels. Together with the installation of the rear disc brakes, it is recommended to replace the bearings in the axle shaft. For example, products from the manufacturer SKF have proven themselves well.
Installation Process: Dismantling
The first step is to dismantle the axle shafts on the rear axle. Then the parts are thoroughly cleaned. You can wash them in gasoline or kerosene. But if there are new half shafts, the old ones can simply be thrown away. Then, fluid is drained from the brake system. Next, the assemblies and parts of the drum brake mechanism are dismantled. Only the handset must be left. Then the retaining rings are removed and the wheel bearing is removed . This can only be done with the help of the press. The ring is made so that the tear-off load is five tons. You can do without the press. Rings are simply brutally sawn by a grinder. But you need to make sure that the axle shaft itself is not damaged. Sawing not to the end. Further, the ring splits with a chisel, and the bearing is removed. The half shafts must be machined under the inner bore diameter of the brake discs.
Mounting the disk on the axis, assembly
Before assembling the axle shafts, it is recommended that all parts be thoroughly washed and cleaned in gasoline. Then install the anther shaft, manufactured abnormal bracket for mounting the caliper and expansion rings. Next, wash the axle bearing. Then the element is lubricated and pressed onto the axle shaft. This is best done using pipe trimming. The bearing is pressed into the stop. The pipe must have a diameter such that it abuts against the inner ring on the bearing.
The pressing process is as follows. The pipe abuts against the rings, and at this time they hammer on the other edge with a hammer. It is worth choosing the pipe and installing it properly. It must not abut against the outer ring of the bearing. Then you should make sure that the bearing landing is made reliably and efficiently. Next, the circlip is heated. It is necessary to warm strongly, red-hot. Then the ring is mounted on the axle shaft. If it sits reluctantly and loosely, it is cut off and a new one is installed. Most often, the part sits poorly due to insufficient heating. A powerful burner is needed. When the ring cools down, install the spacer and directly the brake disc. Now it remains only to install the assembled axle shaft on the car, fix the caliper and connect the rear disc brakes on the VAZ-2107 to the system.
Connection
In the process of connecting there are absolutely no difficulties. Disc brakes will use the standard line. Also, one should not forget about the "sorcerer". This is a braking force regulator. If for some reason it is not on the VAZ-2107, then you must definitely return it. Otherwise, the force will be transmitted unevenly. As a result, the rear disc brakes will apply earlier than the front ones.
Many people remove the "sorcerer" and then regret it. If the rear brakes catch earlier than the front ones, the risk of skidding the vehicle’s axle increases. Also in this case, the brake system mechanisms will overheat and wear out faster. And they remove the element because of the greater effectiveness of the brakes. But in fact there is no effect. It is better to return the factory element to its place.
Disc brakes and parking
Since the installation of disk elements requires the exclusion of the mechanical drive of the parking brake, it is necessary to install a hydraulic drive. This operation is simple. To do this, you need a clutch master cylinder, a drive lever, as well as two hoses from the brake system. Then, a special design in the form of a house is brewed from metal. It is optimal to use steel with a thickness of about 3 mm. The brake stem moves forward and shortens. Then a small-sized piston is made, which will then be inserted into the clutch master cylinder. This piston must include the parking brake rod. It remains only to connect the design. The hose from the brake master cylinder of the circuit is discharged into the vehicle interior.
The element is attached to the first exit to the clutch cylinder. The second hose goes to the "sorcerer". The scheme is simple, although at first glance it may seem complicated. So you successfully combine the rear disc brakes on the VAZ-2107 with the handbrake. Without a parking brake, it will be quite problematic to use a car. Especially if he is preparing for a professional drift.
Recommendations of specialists
After all these operations, it remains only to pump the brakes. In the case of such an upgrade, pumping will take longer. To do this, dismantle the parking brake and install it vertically. This will eliminate air congestion. Brake fluid is best filled with a higher boiling point. It is necessary to periodically service the rear disc brakes on the VAZ-2107. Their repair is similar to the maintenance of any other similar structures.