how to bleed hydraulic brakes on mountain bike

Locating the Bleed Screw

The bleed screw is a small, round nut located on the side of the radiator. It is usually on the upper side of the radiator, but it can be found in different locations depending on the type of vehicle. It is important to locate the bleed screw correctly before attempting to open it, as doing so incorrectly may damage the radiator or cause a leak.

Opening the Bleed Screw

Once you have located the screw, you can open it using an adjustable wrench. Make sure that you use a wrench that fits properly and that you do not overtighten it. When opening the screw, make sure that you do not force it as this can cause damage to both the radiator and to your hands. Once opened, slowly turn the screw counterclockwise until water begins to flow out of it. When water starts flowing out of the screw, close it again and make sure that everything is secure before moving on.

Re-positioning the Brake Lever on Handlebar

Re-positioning the brake lever on handlebar can be a daunting task for a novice cyclist. It requires some basic technical knowledge to understand how the handlebar and brake lever works together. To begin with, you need to loosen the brake cable from its housing and adjust it accordingly. Then, loosen the two screws that secure the brake lever onto the handlebar. After that, you can move the brake lever up or down depending on your preference. Finally, tighten all screws and reattach the brake cable to its housing.

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To make sure that you have re-positioned your brake lever correctly, check if it is comfortable for your hands and if it is easy to reach when you need to use it. The position of the brake lever should be such that when you squeeze it with your fingers, it should apply enough pressure on both wheels to stop them safely. It is also important to check if there is enough clearance between your handlebar and brakes so that they do not interfere with each other while in use.

In conclusion, re-positioning the brake lever on handlebar is an important step in ensuring a safe ride. It can be intimidating at first but once you get used to it, it will become second nature and you will be able to easily adjust your brakes whenever needed. Just remember to always double check your work and make sure everything is tightened properly before hitting the road.

Checking for Leaks in the Hydraulic System

It is important to check for leaks in a hydraulic system. Leaks can cause significant damage to the system and can be very costly to repair. The first step to checking for leaks is to inspect all of the hoses and fittings. Look for any signs of wear or corrosion, as these can be indicative of a potential leak. If any hoses or fittings appear worn or corroded, they should be replaced immediately.

The next step is to check the oil level in the reservoir. If the oil level is low, this could indicate a leak somewhere in the system. To find where the leak is coming from, it may be necessary to use a pressure gauge and inject oil into the system while monitoring pressure changes. This will help pinpoint where in the system a potential leak may be located.

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Once any potential leaks have been identified and fixed, it is important to regularly monitor oil levels and check for any visible signs of leakage at all of the hoses and fittings on a regular basis. This will help ensure that no further damage occurs due to an undetected leak in the system. Regularly inspecting and maintaining your hydraulic system will help keep it running smoothly and reduce costly repairs due to undetected leaks down the line.


Bleeding hydraulic brakes on mountain bikes can be a tricky process. However, by following the steps outlined in this article, it is possible to successfully and safely complete the job. In order to maximize performance and safety, it is important to ensure that all parts of the brake system are in good condition and free of any dirt or debris. Furthermore, it is recommended to use mineral oil-based brake fluid when bleeding the brakes and to follow the manufacturer’s instructions closely.

With a good understanding of the process, as well as the right tools and products, anyone can successfully bleed hydraulic brakes on their mountain bike. Doing so will ensure that they have reliable braking performance when they hit the trails.

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