Difficult to make a choice for your new Brake Bleeder? We wrote this Special brake bleeder buying guide to help you, with the TOP10 of the best sales of the moment, tests, opinions… As in all our buying guides, we've done our best to help you choose the best Brake Bleeder!
Our selection of brake bleeder
Brake Bleeder Buying Guide
Bleeding the brakes is a maintenance that should be done at regular intervals. Indeed, when you travel a certain number of kilometers and you look in the reservoir of brake fluid, you immediately notice that it is necessary to replace its content which, new is completely transparent, whereas over time blackens.
This brake fluid depends on the proper functioning of the hydraulic system during braking, when depressing the brake pedal. Thus, purging is therefore necessary. For this, a brake bleeder is the tool to use. There are several models and to find the right device to bleed the hydraulic circuit of the brakes, you must have selection criteria, hence this buying guide.
The criteria to consider before buying a brake bleeder
Choosing a brake bleeder depends on a few things that should not be overlooked. And this tool can be quite difficult for the uninitiated to understand. It would be easier for a mechanic, but if you are completely new to mechanics, you could get lost in the multitude of brake bleeders on the market.
There are some points that you can refer to to find the best brake bleeder for your vehicle, be it a car or a motorcycle. The more you follow them to the letter, the more apt you will be at sorting out.
In general, the brake bleeders currently on sale on specialized sites or motor bike garages are compatible with all types of vehicles in circulation. So you don't have to worry so much about the question of whether the brake bleeder of your choice is compatible with your car or motorcycle.
However, it is important that you know that hydraulic fluid changes sold in Europe often work best on brake systems in European brand cars. On those of Japanese or Korean brands, it is a little more complicated.
In the majority of cases, you will come across brake bleeders with an adjustable seal that fits any brake fluid bleed system. But, if you wish a bleeder specifically designed for the make and model of your car, you can find one by using its make and model.
You can go for an automatic bleeder if you don't know much about braking. In case you know exactly what a brake bleed is and how it works, you can take it a step further by choosing a manual, but well-designed bleeder.
You should know that the advantage of an automatic drain is its versatility. A car's hydraulic systems typically consist of a hydraulic brake and a hydraulic clutch, both of which often share the same hydraulic fluid. With this type of brake bleeder, you can drain them at the same time.
In this sense, before choosing your brake bleeder, check if it is multifunctional and can drain both your brake and your clutch system.
The first brake bleeders launched on the market lacked precision. Today, the most accurate models are worth their weight in gold. In other words, these are devices of a higher range that require a larger investment to purchase, but which pays for itself through easy emptying that it allows to do.
Indeed, a latest generation brake bleeder allows you to bleed your brake fluid, but also avoids having more air bubbles when filling all the hydraulic circuits, whether that of the brake or the clutch. . In addition, you also have a pressure gauge that tells you if there is a leak.
If you have already checked the previous criteria when choosing your brake bleeder, it should not be neglected. Sometimes manufacturers put simplicity aside in favor of the device’s multiple functionality and efficiency.
A brake bleeder with several components can prove to be complicated to use, unlike one which is extremely simple. However, that does not mean that you should go for this kind of model.
Know that there are brake bleeders that are multi-compatible, versatile and precise while being easy to use. These models are sometimes accompanied by accessories that allow you to use it on any vehicle and bleeding system. In addition, thanks to a well-detailed operating manual, you do not need any outside help.
What is a brake bleeder?
A brake bleeder is a service tool that allows you to bleed the brake fluid from your vehicle. It consists of a container that can be a metal bottle or a glass or plastic jar, some hoses and a hand pump or compressor.
A hose is connected to the purge system and the pump or compressor pushes compressed air into the hydraulic circuit. The used brake fluid exits through the other pipe and is received by a drain container. New brake fluid must be poured into the bleeder container in order to fill the circuit again.
The main advantage of a brake bleeder is that you no longer have to go to your garage to bleed your car's brakes. Without any help, you can do it yourself. This device works by both suction and injection, which allows the circuit to be emptied of the old brake fluid and filled with a brand new one.
Operating principle of a brake bleeder
The installation phase
When you are going to bleed the hydraulic circuit of your vehicle's brake system, you must first put new brake fluid in the bleeder. To do this, you must respect the manufacturer's recommendations : DOT 2, DOT 3, DOT 4, DOT Super 4, DOT 5.1, etc.
Next, unscrew the cap from the brake fluid reservoir in the engine compartment. Check that the bleeder container cap has been tightened securely, then install the brake bleeder hose. Finally, start pumping or activating the compressor so that compressed air is sent to the trap container. Make sure that the pressure is between 1.5 and 2 bars.
The bleeding phase of the caliper bleed screws
This phase consists of bleeding each brake caliper. To do this, you must start with the one that is furthest from the master cylinder. On a car, this is usually the right rear wheel brake caliper. On a motorcycle, the bleeding must be started from the rear wheel caliper.
The procedure is as follows:
- Remove the wheel and install your brake bleeder nearby by connecting a hose to the caliper bleed screw.
- Unscrew the bleed screw making sure that air bubbles form and that some brake fluid comes out. When you notice that the latter clears up and there are no more bubbles, tighten the bleed screw.
- Repeat the same operation for the other wheels, always from the furthest to the closest.
Bleeding the calipers allows each caliper piston to be emptied properly for optimal braking performance. And during the operation, it is therefore always important to monitor the pressure so that the new brake fluid completely reaches the calipers of all four wheels.
At the end of the operation, you remove the drain hose and close the jar cap. If you see that the brake fluid level is below the minimum level, top up making sure to do not exceed the maximum level.
How to use a brake bleeder type gun ?
The use of a "gun" type brake bleeder is different from that of a conventional brake bleeder. The first step to do with this tool is to fill it with new brake fluid, connect the hoses, and check that the pressure gauge is working. Then you have to pump the trigger to put the container under pressure.
When bleeding the calipers, you must each time check the level of the new brake fluid in the tank of the vehicle as well as in the container of the bleeder. In case of lack, you must top up so that the whole circuit is well filled. If the pressure gauge indicates a pressure below 1.5 bar, pump again on the bleeder. It is indeed important to keep the pressure at a normal level. This will prevent you from having air bubbles which will make it difficult for you to purge.
What is the role of brake fluid on a brake system?
Brake fluid is one of the main components in a vehicle, car or motorcycle braking system. Its role is at the very heart of the operation of the hydraulic brake system. By the pressure applied to the brake pedal, the master cylinder transfers this pressure through the brake fluid to the calipers, particularly to each caliper piston. Since the pistons are fully under pressure, the brake pads push against the brake disc, creating resistance to the braking. In other words, brake fluid transmits the energy produced by your foot to the brake pedal.
When to bleed brake fluid
Brake fluids are so-called fluids hygroscopic. They have the property of absorbing moisture in the air. This has the consequence of rapidly degrading its consistency and the useful properties of the braking system.
Also, keep in mind that the pads that create resistance when rubbing against the brake disc heat up, which increases the temperature of the brake fluid. The latter has the ability to also absorb this heat, which can degrade its quality as and when braking.
The most degrading factor is moisture absorption as it can reduce the wet boiling point of brake fluid. If the latter must 155 ° C on a DOT 4 type liquid, it may drop to 140 or even 130 ° C, because the humidity level is too high. And during sporty driving, gas bubbles may form in the hydraulic system, which can damage brake system components.
In summary, it is therefore important to bleed the brake fluid regularly so that the wet boiling point is always at the right temperature. Specialists usually recommend brake fluid replacement every two years or 10,000 kilometers to prevent brake failure.
Some recommendations for bleeding brake fluid
Carrying out a brake bleeding must take into account various precautions to be taken in the operation:
Dernière mise à jour : 2021-01-20 02:40:58