The effectiveness of the braking system is fundamental to the safety of any vehicle, and Škoda Fabia The first generation is no exception. Over time, the rear brake mechanisms wear out, and one of the key elements requiring attention is the rear brake cylinder. It is he who converts hydraulic pressure into mechanical force, causing the brake pads to press against the drum.
Many owners Fabia They underestimate the importance of timely diagnosis of this part, believing that replacing the pads solves all problems. However, worn rear brake cylinder can lead to leakage of brake fluid, loss of pressure in the circuit and, as a result, to an increase in the braking distance. Ignoring symptoms often ends up with expensive repairs to the entire braking system or, worse, an emergency.
Design features and principle of operation of the unit
Rear brake system Škoda Fabia 1 (and its modifications, such as:) Spaceback or Combi) in most configurations is made in the form of a drum mechanism. In the center of this node is located brake slave cylinderIt's attached to the brake shield. When pressing the brake pedal, the liquid along the main goes inside the cylinder, pushing the two pistons in different directions.
These pistons press on the brake pads, dividing them to the side of the inner surface of the drum. The design provides for the presence of sealing rings and anthers that protect the inner cavity from dirt and moisture. It is important to understand that the cylinder operates in an aggressive environment: high temperature during braking and constant contact with road salt make it vulnerable to corrosion.
Feature Fabia The first generation is that the cylinder is often changed in assembly with the mechanism or as a separate assembly, which requires accuracy when disassembling. Incorrect installation can lead to jamming of pistons.
Symptoms of malfunction and signs of breakdown
Recognizing the problem early on is saving time and money. The main indicator of problems with rear-brake is the level of brake fluid in the expansion tank. If you notice that the liquid is going away, and there are no visible stains under the car, most likely, the leak occurs inside the mechanism, and the liquid is simply absorbed into the material of the brake pads.
The second obvious sign is uneven braking or “steering” the car away when sharply pressing the pedal. This occurs when one of the cylinder pistons acidifies or does not eject completely due to wear and tear of the cuff. There may also be a characteristic creak or grinding that is not related to the wear of the pads themselves.
No less dangerous symptom is a “soft” brake pedal. If it falls to the floor without tangible resistance when pressed, this indicates a loss of tightness in the contour. In such cases, exploitation Škoda Fabia It is strictly prohibited until the fault is corrected.
⚠️ Warning: If you find traces of brake fluid on the inside of the rear wheel or on the brake drum, stop using the vehicle immediately. The oil hitting the friction pads makes them completely unusable, and replacing one pad will not help - they will have to be changed in the set with the drum.
Selection of spare parts: original or analogue?
When selecting a new part for Škoda Fabia 1 Owners often face a dilemma: Buying the original cylinder from the manufacturer or trust proven analogues. Original parts supplied under the brand VAGThey guarantee perfect compliance with tolerances and materials, but their price can be significantly higher than the market.
The modern auto parts market offers many quality alternatives. Brands like this TRW, ATE, Textar and Febi Bilstein They are often manufactured in the same factories as the original. The main condition is to avoid cheap fakes of unknown origin, since the quality of rubber seals in them often leaves much to be desired.
When buying, be sure to check the labeling and availability of protective packaging. The cylinder must be new, with intact anthers and no traces of rust on the body. Remember that a cheap piece can fail in a couple of thousand miles, making you pay for the work of the master again.
Below is a comparison table of popular brands for the rear brake cylinder Fabia:
| Brand | Country | Average price (RUB) | Features |
|---|---|---|---|
| TRW | Germany/Poland | 2500-3500 | High quality, perfect geometry |
| ATE | Germany | 3000-4000 | Operational reliability, long service life |
| Febi Bilstein | Germany | 2000-2800 | Optimal price-quality ratio |
| Demons (VAG) | Czech Republic/Germany | 4000-5000 | Original, maximum compatibility guarantee |
| Old Chinese analogues | China | 800-1200 | Risk of rapid corrosion and leakage, not recommended |
- Original VAG
- Quality analogues (TRW, ATE)
- Budgetary analogues (Brembo, Kaysa)
- I only buy what is in stock
Preparing for replacement: tools and consumables
Before you start work, you need to prepare everything necessary. For replacement rear-brake cylinder on Škoda Fabia You will need a standard set of tools, but there are specific nuances. It is necessary to have a jack and reliable stands, as you will have to work under the car.
You will need: 10, 12, 13 and 14 mm keys (depending on the year of release), a balloon key, a metal brush, WD-40 or similar penetrating lubricant, and a brake fluid drain container. Don’t forget about the new brake cylinder and, preferably, a new set of brake pads, as the old ones can be contaminated with liquid.
Pay special attention to the cleanliness of the workplace. Dirt trapped in the braking system can quickly disable new cuffs and pistons. Clean the area around the cylinder and drum of dust and dirt before disassembly begins.
☑️ Preparing to replace the cylinder
Step-by-step replacement instructions
The replacement process begins with lifting the car and removing the rear wheel. Remove the brake drum; if it is boiling, gently tap it with a hammer through a wooden stall or use special removers. Do not try to remove the drum until you unscrew the guide bolts.
Unscrew the brake fluid supply connection, substituting the container, and disconnect the brake hose. Be prepared for a little liquid to leak out immediately. Next, unscrew the two bolts of attaching the cylinder itself to the brake shield. Carefully remove the old knot, trying not to damage the pistons and cuffs if they are still intact (although changing them is still not recommended).
Install new cylinder, pre-lubricated the seats with clean brake oil. Twisting the mount bolts with the recommended tightening moment. Connect the brake hose and pump the system, removing the air. This is a critical step in ensuring safety.
What to do if the drum cannot be removed?
Often the drum clings due to rust or wear. Do not use the hammer directly on the metal. Try to warm up the place of adjoining the drum to the hub with a building hair dryer or blowtorch, then knock on the end of the drum. In extreme cases, you can use a removable, but act carefully so as not to damage the bearing of the hub.
⚠️ Note: When installing a new cylinder, do not use old brake pads in any case if there are traces of brake fluid on them. The liquid irreversibly reduces the friction coefficient of the friction material, and braking will be ineffective. Be sure to replace the pads and wipe the drum with clean rags.
Before starting work on pumping brakes, wear protective glasses. Brake fluid is aggressive to paint and paint coatings, and even splashing can spoil the appearance of the car. Also make sure that during operation the brake pedal will not be pressed accidentally, so as not to push the pistons out of the new cylinder completely.
Brake system pumping and final check
After installing a new unit, it is necessary to remove air from the system. Nana Škoda Fabia 1 This is done in a standard way: one person presses the brake pedal, the second at this time opens and closes the pumping fitting on the rear cylinder. Repeat the procedure until the tube is not released liquid without air bubbles.
Check the fluid level in the tank after each operation. If it drops to a minimum, air can get back into the main cylinder and the process will have to start again. Make sure the pedal is stiff and has a clear course.
After assembly, test the car on a safe stretch of road. Check the brakes at low speeds, make sure that there is no sideways and extraneous noise. Only then can you return to active driving.
This is a critical factor for the durability of all hydraulics.
Properly pumped brake system is the guarantee that the new cylinder will last a long time and will work in tandem with other elements without failure. Neglecting this stage can negate all the work done.
Frequently asked questions and answers (FAQ)
Is it possible to replace just one rear cylinder?
Technically, this is possible, but experts strongly recommend changing the cylinders on both axles (left and right) at the same time. This will ensure uniform braking and eliminate distortions in the system.
How long does it take to replace?
For an experienced craftsman, replacing one rear cylinder takes about 40-60 minutes. If you are doing it for the first time and are faced with boiling details, book 1.5-2 hours for work.
Should I change the drum with the cylinder?
Not if the drum does not have deep holes, cracks or critical wear of the working surface. Just wipe it and check the beat. If the surface is damaged, it is better to replace it.
Which brake fluid is best for Fabia 1?
The manufacturer recommends using DOT 4 standard liquids. The best fit original liquids VAG or quality analogues from brands ATE, Bosch, Motul, which do not cause corrosion of rubber seals.