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Question:

How do I check for air leaks in a vehicles hydraulic brake system?

Having replaced a faulty brake cylinder (rear) I am having trouble bleeding the brakes again. The seems to be air getting in somewhere because when bleeding there is always air coming out and it doesn‘t stop after a time. Is there an easy way to check for where the problem/leak might be? There doesn‘t appear to be any hydraulic leaks visible.

Answer:

Not sure how ur bleeding the cyclinder. Remember to close the bleed valve after to push the pedal down. If you leave it open it will suck air back into the system.
The brake system is a closed system that is under pressure when the brakes are applied. The only place (I can think of) air could enter the system is around the master cylinder cap. Just remember to bleed all the wheels starting with the furthest from the master cylinder (usually the right rear) and use new brake fluid. Check with the manufacturer for the proper fluid. Not knowing what kind of vehicle you have, some Hondas use only Honda fluid for example.
i'm uncertain appropriate to the effectiveness of the equipment yet i understand that between the secure practices effective aspects of air brakes that's extremely stable for super autos. to verify that the air destroy to allow the wheels to spin the equipment would desire to be pressurized. if there's a loss of air stress the breaks will work together slowing and combating the vehicle.

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