How to change the rear brake cylinder on a Kalina?

Rear brake cylinder VAZ 2114

It’s not uncommon for many car enthusiasts, including the domestic auto industry, to have a problem with their brakes. This type of car malfunction is the most dangerous and there are many reasons for this.

According to their principle of operation, brakes can be:

• foot hydraulic;
• manual, mechanical locking.

VAZ 2114 cars are equipped with drum brakes in the wheels in which the rear brake cylinders are installed. But, in other respects, as on all manufactured cars. The only differences can be in the type of blocking element: disk and drum. But also according to the manufacturing technology of the brake cylinders themselves.

Where is the brake cylinder located? The rear cylinder is located at the rear on the inside of the metal casing. In order to find it, just look under the car and above the bridge you will immediately see tubes through which it is simply difficult not to find it.

Location of the rear brake cylinder on a VAZ 2114

Car brake system repair

When repairing the brake system, replacing the rear or front brake cylinder, connecting pipes, front cylinder or hoses. Everything requires subsequent pumping of the entire system. Therefore, it is necessary to provide access to all wheels at the same time. To do this, lift the car evenly and place it on supports; for greater convenience, you can remove all the wheels, and not just the one on which you need to directly replace the cylinder. When carrying out such actions, always remember the precautions that you need to take for your own safety.

Replacing the brake cylinder itself does not seem difficult, but there are quite a lot of additional manipulations that must be performed. In order to do this, you can refer to the technical instructions for the car for maintenance and repair, or you can do without it, because there is nothing supernatural in this.

Bleeding the brake system.

To bleed, prepare: liquid, a wrench of suitable diameter for the air fitting, a hose that fits tightly onto the fitting and any container. The pumping scheme depends on how the circuits are located in a particular VAZ model. Some brakes require bleeding from a “long line,” meaning from the furthest wheel relative to the master cylinder.

More specifically, it looks like this: in the car the master cylinder is placed looking at the rear bumper, which means that the rear right cylinder is pumped first, then the rear left one. The front left one comes next, and the procedure ends by bleeding the wheel that is located on the right side of the master cylinder. In later models, the scheme involves bleeding crosswise while looking at the car from behind:

• right rear wheel;
• left front wheel;
• left rear wheel;
• right front wheel.

In any case, bleeding should be completed with the front right wheel.

During this process, do not forget to monitor the level of hydraulic fluid in the reservoir so that air does not enter the system again.

We also recommend watching videos on the topic:

Required Tools

In order to replace the brake cylinder you will need the following tools:

1. wheel wrench;
2. jack;
3. WD-40;
4. socket wrench 10;
5. a device for unscrewing fittings if necessary;
6. metal brush;
7. rags;
8. pliers;
9. a screwdriver or pin for tensioning the springs.

Before starting all types of work, be sure to provide a place for laying out all spare parts; when removing them, it is advisable to remember the sequence and methods of removing them. This will make the reverse process much easier. In addition, before such a procedure, it is advisable to stock up on a set of brake pads, because they still need to be changed every year depending on the intensity of driving. And besides, they don't cost that much. So, having everything listed in our arsenal, let's get to work.

How to remove the caliper on a VAZ 2105

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Sources

• https://avtovazlada.ru/index.php?page=65786
• https://ereliwomufulaqahowig.j.pl/kak-snyat-support-na-vaz-2105.html

Brake Cylinder Replacement Procedure

Replacing the rear brake cylinder on a VAZ 2114 is no different from the same procedure, say, on 2106 or 21099.

• At the first stage, it is necessary to provide access to all wheels at the same time, because this will make it easier to subsequently pump the entire system. To do this, they placed the car on supports and raised it. It is most convenient to do this on a screw lift, but you can do without it.
• Using a wheel wrench, unscrew the wheel we need.
• Using pliers, unscrew the studs that secure the drum to the hub. And we remove it evenly, while you may have to tap a little with a hammer on its back through the wooden spacer. Be careful when doing this because the drum is made of very fragile material. Additionally, use a metal brush to clean the cylindrical surface of the hub from rust and dirt.
• Then carefully remove all parts of the brake system. But most often it is better to remove everything, because the casing, as a rule, needs to be processed and painted with at least primer.
• Next, we proceed to dismantling the cylinder itself. To save yourself the hassle, be sure to thoroughly clean the connection between the cylinder and the brake pipe. However, remember that they can be either steel or copper. In this regard, it is necessary to be careful in all actions so as not to damage them.

How to unscrew the rear brake cylinder on a VAZ 2114 if the connections are stuck?

• You can try to unscrew the fitting with a 10mm wrench, but most likely this will result in the edges breaking, so generously moisten all connections with WD-40 for a while. In a relatively short period of time it will corrode and dissolve all metal oxide, and due to its microscopic nature it even gets into micro gaps. Usually after such actions the fitting is easily unscrewed. But if this does not help, and there are practically no edges, then there is a special wrench on sale, which is a socket wrench with a slot and a clamping bolt. This simple device allows you to unscrew any stubborn connections without much effort. You need to securely attach it to the nut, tighten it with the bolt and turn it.
• So, having defeated this connection, proceed to unscrew the brake cylinder itself. Here everything is much simpler, because it is bolted with only two M6 bolts, with a 10 key. As a rule, it is easily unscrewed and the cylinder is easily removed from the hole.
• After dismantling the old cylinder, carefully inspect the condition of the newly unscrewed fitting and the installation location. All defects should be removed and burrs cleaned.
• Reassemble the brakes in reverse order. Start checking the cylinder only after assembling the entire wheel brake mechanism. Install the pads, trims, do not forget to hook the handbrake cable back on. This is a common problem in this business. The main thing is to put everything back together exactly as it was.

We figured out how to replace the brake cylinder, now let's start bleeding the system.

• After installing the drum, you can begin bleeding the system. It must be started from the farthest wheel in a clockwise direction. This is due to the fact that the system is quite large and in order to pump air out of it it is necessary to start from distant areas, gradually filling the entire system.
• After bleeding, carefully inspect the new cylinder and its connection to the tube for leaks. In this case, you need to press and hold the brake pedal as hard as possible a couple of times.
• To simplify your task, in the event of a malfunction of the newly purchased cylinder, and not do a bad job. You can check the cylinder without a drum, but here you will need good physical strength and two mats to press and hold the pistons.
• With properly adjusted brakes, the front wheels first grab dead when you press the pedal sharply, because they are closer to the master cylinder, and then both rear wheels grab at the same time. If this is not the case, then the system should be bled again or re-maintained.

But sometimes the rear brake cylinder can be repaired; for this purpose, repair kits are sold, which include several o-rings and two boots. But this is only advisable if the condition of its inner surface is excellent.

Instructions for assembling and disassembling the rear mechanism of the Lada 2107 with your own hands, the procedure for removing and installing the cylinder of the Lada 2105, checking the cylinders of the VAZ 2104, VAZ 2105, VAZ 2107. Operation and repair of the brakes of the Lada 2104. Checking the brake booster and cylinder of the Lada 2107. Maintenance of the front and rear brake mechanisms, regulator fret 2105.

Wheel cylinder: 1 — pad stop; 2 — protective cap; 3 - cylinder body; 4 - piston; 5 - seal; 6 — support cup; 7 - spring; 8 - crackers; 9 — thrust ring; 10 - thrust screw; 11 - fitting; A - slot on the thrust ring

Remove the protective caps 2, then press out the pistons 4 assembled with the parts of the device for automatically adjusting the gap between the brake pads and the drum of the VAZ 2104, VAZ 2105, VAZ 2107 from the cylinder body.

Wheel cylinder parts: 1 - piston assembly; 2 — cylinder body; 3 - thrust screw; 4 - thrust ring; 5 - crackers; 6 - spring; 7 — support cup; 8 - seal; 9 - piston; 10 - protective cap

Install the piston assembly with the automatic device on a special device so that the protrusions of the device cover the head of the thrust screw 3. Using a special screwdriver, turning the piston 9, unscrew the thrust screw 3 from the piston. Remove the seal 8 with the support cup 7 and the crackers 5 from the screw. Separate the thrust ring 4 and the thrust screw 3. Assemble the automatic device for adjusting the gap between the shoes and the VAZ 2107 drum and the wheel cylinder itself in the reverse order, taking into account the following:

— tighten the piston thrust screws with a torque of 3.9–6.9 N·m (0.4–0.7 kgf·m); Slot A on the rings should be directed vertically upward; deviation from the vertical is allowed no more than 30°. This arrangement of the slot ensures more complete removal of air from the brake drive of the VAZ 2107 VAZ 2105 wheel when bleeding the brakes; — to pre-compress the thrust rings, press the pistons into the cylinder body using a special device in the shape of a VAZ 2104 cylinder with a conical internal hole; — the force of pressing the piston into the cylinder must be at least 343 N (35 kgf); if the force is less than 343 N (35 kgf), replace the thrust ring; — when pressing the piston into the cylinder, it is necessary to maintain dimensions of 4.5–4.8 mm and 67 mm (maximum) for a free fit of the VAZ 2105 brake drum; — before installing parts into the cylinder body, lubricate them generously with brake fluid.

After assembly, check the movement of each piston in the cylinder body of the VAZ 2104, VAZ 2105, VAZ 2107. They should move easily within 1.25–1.65 mm. Replace the protective caps 2 last.