How to change the brake fluid correctly? (2022)

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Change the brake fluid

It is not as vital that you can operate the vehicle as it is that it has effective braking systems.

Because of this, the brake fluid is, without a doubt, the most critical component of a vehicle. If it is not present or if it is not in good condition, the safety of the car, as well as the safety of all other people who use the road, is jeopardized.

Change the brake fluid

In the following paragraphs, we will discuss everything pertinent to brake fluid and answer any questions you may have.

Transmission of power and acceleration of that power using a hydraulic system

The brakes on a car are operated hydraulically, except for the handbrake, which is used manually.

This indicates that fluid is responsible for the transmission of the braking force. Liquids can never be compacted due to their unique property of being perfectly dispersed throughout a network of tubes and vessels, but they cannot be squeezed.

Because of this, the force generated at a particular point, such as when the brake pedal is depressed, will invariably be transmitted to the system.

There is also a type of brake known as a pneumatic brake or a hybrid brake, which combines hydraulic and pneumatic components into a single system.

These are frequently discovered on large vehicles like trucks and buses. This is why these vehicles make such a loud whistling sound when they brake at traffic lights.

However, these systems are synchronized to faultless perfection. The gases can be compressed, and the resulting pressure can be transmitted in a reduced and delayed manner.

This is the primary distinction that can be made between hydraulic and pneumatic systems. Only brakes that use hydraulic pressure can be found in automobiles.

Pull cables operate nothing but the parking brake on this vehicle. The presence of gases in the brake hoses can have potentially disastrous effects.

They even have the potential to bring about a complete breakdown of the braking system. The driver then has no choice but to watch as his vehicle collides with an obstruction because the brake pedal suddenly stops working.

What mechanism allows gas to enter the brake fluid?

There are two different entry points for gas into the brake fluid. Vapor bubbles can be formed when condensation begins to boil and boils.

In addition to this, there is a possibility that the brakes will leak, allowing outside air to enter.

This latter scenario does not happen very often, but it is possible in older brake systems or when the incorrect brake fluid is utilized.

Your vehicle’s brake fluid is located in the following locations:

On the other hand, if water is found in the braking fluid, this poses a significant problem. This is a fluid that needs to perform many different functions, including the following:

  • An exceptionally high level of resistance and dependability in both high and low temperatures
  • Transmission of power that can be relied upon
  • No flocculation
  • It does not have any reaction with the materials with which it comes into contact.

The most dangerous foe: water

Commercial braking fluids can meet the aforementioned requirements, but utilizing them has disadvantages.

One of these is that the fluid is highly hygroscopic, which means it has a strong affinity for holding onto water.

In the same way that a block of salt will gradually take in condensation moisture from the surrounding air, brake fluid will also accumulate progressively more and more water.

The fact that this accumulation can be observed is a positive development. New brake fluid has a transparent appearance and a golden yellow color.

The color and appearance of old, contaminated brake fluid are green and cloudy.

Be careful though, since if the fluid turns this hue, it’s too late to make a change that will keep you safe; you need to act right now.

Always make complete adjustments.

Before making any adjustments, make sure you check the brake fluid level first. If it is too low, it is clear that the system is losing this vital hydraulic fluid through some leak.

Repairing this damage must come first to make room for adding new brake fluid.

Attention: It’s wrong and unsafe to simply add new brake fluid. One reason for this is that any newly added juice is immediately tainted, and the braking system is doomed to fail at some point in the future because the leak is not fixed.

Because of this, you should always replace the brake fluid completely. Either suction is used to remove it or trained through the bleed screws on the wheel brake cylinders.

In addition, pressurized air is utilized in professional auto repair shops to remove any traces of the fluid in question from the brake system.

Don’t forget to vent

There is more involved than just adding brake fluid to the system. The entire system needs to be vented to ensure that there is only fluid and no air inside the brake system.

Having a helper take the vehicle’s wheel is the simplest way to accomplish the task. You will begin by working on the wheel brake cylinder located in the most remote part of the brake system.

In the case of automobiles with left-hand drives such as those used in Spain, this would refer to the right rear wheel of the vehicle.

There, the screw that controls the bleeder is loosened. After that, the assistant presses down on the brake pedal until all the brake fluid has drained out of the system.

The operation is then repeated with the remaining wheels after quickly tightening the screw. Checking the level of the fluid is something that should be done in the interim.

Observe the prescribed time gaps

It is required by law that the brake fluid in a vehicle be changed at least once every two years. Old brake fluid should draw attention because this period typically coincides with the intervals at which the general inspection is performed.

On the other hand, the general inspection does not include a check of the composition of the brake fluid; instead, it focuses only on the effectiveness and integrity of the brakes.

Because of this, the condition of the brake fluid in a used vehicle is usually problematic in almost all cases.

Either the vehicle had been parked for a considerable time, or the previous owner did not adhere to the recommended oil change intervals.

We recommend that you: Aftermarket test strips are available to determine the percentage of water in the brake fluid.

However, before purchasing a used vehicle, it is recommended that the oil and brake fluid be replaced with fresh juices of the same type.

Would you kindly dispose of the brake fluid properly and not dump it down the drain? It is possible to pour it into the purchased container and then take it back to the store from which it was bought.

After that, the distributor will take care of making disposal arrangements. You can also have it sent to the online store or delivered to a waste management facility at no cost.

How to change the brake fluid correctly

Brake fluid must not be mixed.

In any event, you shouldn’t just add more brake fluid like that. When adjusting and resetting the brake fluid level, you should always use the exact measurement the manufacturer specifies.

The DOT number, which can be found on the container, provides information about the brake fluidized.

DOT types 1 through 4 are typical in Europe, whereas DOT type 5 is the norm for vehicles sold in the United States.

In this case, it is essential to adhere to the specifications of the letter. Using the incorrect brake fluid can cause damage to the components of the braking system, leading to leaks and, as a result, contamination of the system. This can lead to an unsafe situation if the brakes fail.

Choose well-known brands of high-quality products

The essential element of a vehicle is its braking system. It is imperative that the components that are installed always be of the highest quality and come from the best brands.

This holds for the brake fluid as well. Products with an unknown manufacturer’s origin almost certainly contain artificial ingredients and are of low quality.

Their utilization presents an unquantifiable risk. Premium materials are always required for brakes, even if these materials come at a slightly increased cost. However, their protection is well worth the effort.

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