The braking system of any vehicle is a critical safety element, and for Skoda Octavia Tour this statement is especially relevant. Over time, rubber elements are exposed to high temperatures, aggressive liquids and pressure changes, which inevitably leads to their aging. Ignoring signs of wear can lead to catastrophic consequences during high-speed emergency braking.
The process of replacing brake hoses requires not only tools, but also a deep understanding of the vehicle's hydraulic circuit. Owners often underestimate the complexity of the procedure, trying to save on service costs, but a mistake when bleeding the system can cost their health. In this article we will analyze all stages of work, from diagnosis to final inspection, so that you can complete the task efficiently and safely.
Signs of wear and need for replacement
A rubber brake hose is a consumable material that is designed for a certain service life, but actual operating conditions often shorten this life. External damage may not be noticeable during normal inspection, since most of the wear occurs inside the structure or under a layer of dirt. Regularly checking the condition of the suspension and braking system elements should become your habit.
The main symptom of problems with hoses is a soft brake pedal, which becomes โwobblyโ and falls when pressed. This phenomenon often indicates depressurization or loss of rubber elasticity, causing the hose to expand under pressure instead of transferring force to the caliper. It is also worth paying attention to visible defects, such as cracks, swelling or traces of brake fluid leakage.
- ๐จ Bloating on the surface of the hose, which appear when you press the brake pedal and disappear when you release it.
- ๐ง Deep cracks on the rubber surface, especially in places of bending and attachment to metal tubes.
- ๐ง Traces leaks brake fluid in the area where the hose connects to the caliper or steering knuckle.
- โ๏ธ Availability corrosion on metal fittings, which may make it difficult to unscrew or cause rupture when replacing.
If you notice at least one of the listed signs, you absolutely cannot postpone repairs. Operating a vehicle with a faulty brake system poses a direct threat to the lives of the driver and passengers. Security does not tolerate compromise, and any suspicious changes in the behavior of the pedal should be a reason for immediate diagnosis.
โ ๏ธ Attention: Never use brake fluid that has been in an open container for more than 24 hours. The hygroscopicity of the composition leads to the rapid absorption of moisture from the air, which reduces the boiling point and can cause โairingโ of the system when heated.
Selection of quality spare parts and components
There is a huge range of brake hoses on the auto parts market, and choosing the right option is the key to long-lasting repairs. Original from Skoda will always be the best choice, but there are also high-quality analogues from trusted manufacturers that meet factory specifications. Saving on such details often leads to repeated visits to the service and additional expenses.
When purchasing, pay attention to the markings and date of manufacture. Over time, rubber becomes tanned even on a store shelf, so it is better to avoid old stocks. It is also important to make sure that the hose set is suitable for your modification, since sizes and lengths may vary depending on the body type and configuration Octavia Tour.
- ๐ท๏ธ Check article number spare parts and check it with the catalog, taking into account the VIN code of your car.
- ๐ Please note production date โ the hose should not be older than 2-3 years from the date of manufacture.
- ๐ฆ Make sure you have everything you need o-rings and copper washers included.
- ๐ก๏ธ Give preference to brands with a proven reputation, such as Continental, TRW or ATE.
It is important not to forget to replace all accompanying fastening elements if they show signs of corrosion or deformation. The metal clamps and brackets that hold the hoses in the correct position must be rigid and reliable. Ignoring the condition of the fasteners may result in the new hose rubbing against the suspension elements during operation.
- Once a year
- Once every 6 months
- Only when problems arise
- Never checked
Necessary tools and workplace preparation
Before starting work, it is necessary to prepare all tools and provide access to the working areas of the vehicle. The absence of the necessary key at the most crucial moment can lead to thread failure or damage to the part. It is better to carry out work in a pit or overpass to provide free access to the lower part of the car and wheel arches.
To replace, you will need a standard set of plumbing tools, including wrenches for unscrewing the bleeder fittings and wrenches for fixing the hose fittings. Pay special attention to wrenches that fit the fitting sizes on your vehicle, as they may differ from standard sizes. Also, do not forget to prepare a container to drain the old brake fluid.
โ๏ธ Preparing to replace hoses
The work area should be clean and well lit so you can see all parts and connections. Dirt and oil on the brake mechanisms are unacceptable, as they can enter the system and reduce braking efficiency. If you are working in a garage, make sure there is sufficient ventilation to remove brake fluid vapors.
- ๐ง Set open-end wrenches (usually 10, 11, 12 mm) for working with fittings.
- ๐ช Screwdrivers with flat and cross blades for removing protective caps.
- ๐งด Cleaner for the brake system and rags to remove dirt.
- ๐งค Gloves and safety glasses for working with caustic chemicals.
Step-by-step instructions for dismantling old hoses
The dismantling process begins with freeing the hose from its fasteners and disconnecting it from the brake caliper. First you need to remove the protective rubber cap from the bleeder fitting to make sure there are no leaks and access to the thread. Next, carefully unscrew the fitting connecting the hose to the brake caliper using a suitable size wrench.
It is important to fix the hose itself with a key at the place of its attachment to the body or suspension lever, so as not to turn the fitting and not to tear the thread. After unscrewing the bottom connection, disconnect the top of the hose from the metal tube that comes from the main cylinder. Be careful not to damage the metal tube, as replacing it will require much more effort.
Before unscrewing the fittings, plentifully moisten them with penetrating lubricant (for example, WD-40) and let it stand for 10-15 minutes. This will greatly facilitate the dismantling of rusted joints and reduce the risk of thread failure.
If the hose is boiled or not amenable to unscrewing, do not use excessive force so as not to damage the mount on the body. Use special lubricants and heating (if it is safe for surrounding elements) to soften the rust. In extreme cases, a metal tube may need to be replaced if the thread on it is already damaged.
What do I do if the plug is broken?
If the thread is broken, the metal tube must be replaced entirely or a repair kit with a new thread cut should be used if technically possible. In most cases, the entire highway is replaced.
- ๐ฉ Unscrew fitting attaching the hose to the caliper, holding the hose itself with the second key.
- ๐ซ Disconnect fastening hose to the body or lever, removing the locks or bolts.
- ๐ง Disconnect the top end of the hose from metal tube highways.
- ๐๏ธ Remove the old hose and clear seats from dirt and rust.
Installation of new hoses and pumping of the system
Installation of new hoses should be carried out with maximum accuracy, so as not to twist them and not create unnecessary stress. New hoses often have protective caps at the ends that need to be removed just before installation. Make sure the hose runs through the regular channels and does not touch the rotating parts or sharp edges of the body.
When tightening connections, use a dynamometer key so as not to drag the thread and damage the seals. Copper washers that come with the kit are usually disposable and must be replaced with new ones. The puff should be reliable, but not excessive, to avoid deformation of the sealing rings.
โ ๏ธ Warning: After installing the hoses, never start the engine and do not touch from a place without first pumping the brake system. Working with non-functioning brakes can lead to an accident and serious injuries.
The pumping of the system is a critical stage, on which the effectiveness of braking depends. The air remaining in the system makes the pedal soft and reduces the pressure in the circuits. The procedure shall be carried out sequentially, starting with the wheel furthest from the master brake cylinder.
The correct pumping sequence for most Skoda models: rear right, rear left, front right, front left.
Control and testing
After completion of all work, it is necessary to carefully check all connections for leakage. Inspect the places of attachment of hoses to calipers and tubes, making sure that brake fluid does not leak out. Any drop of liquid in this place indicates improper puffing or damage to the seals.
Check the position of the hoses in the suspension, making sure that when turning the wheels they do not stretch and rub against the body. The hoses must be free-route and not be subjected to mechanical stress in the extreme steering positions. This will ensure their long service and prevent premature wear.
| Parameter | Normal value | Symptom of malfunction |
|---|---|---|
| Pedal hardness | Hard, elastic. | Soft, falling through. |
| Liquid level | Between MIN and MAX | A sharp drop in the level |
| Leakage | None | Liquid traces on the details |
| Braking sound | Missing | Whistling, creaking, knocking |
Before leaving for the road, perform test braking at a safe area with low speed. Make sure the car stops smoothly, without sideways and extraneous sounds. Only after a successful test can you move to a more dynamic driving. If the pedal remains soft, repeat the pumping procedure.
- ๐ Look around. connections For brake fluid leaks.
- ๐ Check freewheel The hose when turning the wheels to the point.
- ๐ Swipe test braking at low speed to check the effectiveness.
- โ๏ธ Make sure it's not there. withdrawal The car is sideways when pressing the pedal.
Common replacement errors and their consequences
Beginners often make mistakes that can negate all repair efforts. One of the most common mistakes is to use an old brake fluid that has already lost its properties. This leads to a decrease in the boiling point and the formation of steam stoppers with intensive braking.
Another common mistake is to incorrectly sequence the tightening or use inappropriate tools. A failure of the thread on the fitting can lead to the need to replace the entire caliper or metal tube, which will significantly increase the cost of repair. It is also important not to pull the hose, as this will lead to its rapid destruction.
Why canโt you mix different types of brake fluid?
Mixing liquids with different chemical bases (for example, DOT-4 and DOT-5) can cause precipitation, corrosion of seals and complete loss of braking properties of the system.
Installation of hoses incorrectly when they are twisted or stretched is also a serious mistake. This creates an internal stress in the rubber, which accelerates its aging and can lead to tearing under pressure. Always follow the regular trajectory of the highway.
โ ๏ธ Never use DOT-5 brake fluid on cars that are not designed for it. This liquid has a silicone base and is incompatible with systems designed for glycol compositions (DOT-3, DOT-4).
Questions and answers (FAQ)
How often should I change the brake hoses on the ล KODA Octavia Tour?
It is recommended to replace brake hoses every 4-5 years or when signs of wear (cracks, bloating) appear. Regular diagnosis at each maintenance will help identify problems early.
Can you change the hoses on just one axis?
Technically possible, but experts strongly recommend changing the hoses in pairs (on both sides of the same axis). This ensures uniform braking and the same resource of the elements, as the old hoses on the second side can fail soon after repair.
Do I need to change the brake fluid when replacing the hoses?
Yes, replacing the hoses inevitably leads to air entering the system and mixing the old liquid with the new one. Complete replacement of brake fluid in this procedure is mandatory to ensure maximum efficiency of braking.
What if the pedal remains soft after the replacement?
There is probably air in the system. It is necessary to repeat the pumping procedure, making sure that all the compounds are tight. If the problem is not solved, check the main brake cylinder or the presence of microcracks in the new hoses.
How much brake fluid does it take to replace the hoses?
For the complete replacement of all four hoses and pumping of the system, 0.5-1 liters of fresh brake fluid is usually required. It is better to buy 1 liter to have a margin for re-pumping or compensation for losses.