![]() ![]() To prevent this, wire-brush the union, then soak it with Attempts to loosen it 'nay fracture the pipe. Often corrosion will have seized he union nut to the pipe or component. If you do need to disturb any unions on older -.sars, take great care. Renewing brake pipes is best eft to a specialist. If brushing brings it up bright and smooth, it is usually sound.īut deep pitting weakens it seriously - the rust will return anyway and go on eating through the metal. ![]() Surface rust only is not a problem, but deep pits in a pipe mean that it should be renewed. Where there is rust or corrosion, clean the pipe or union with a wire The limiter will usually be underneath the car and at the back. a device that governs the hydraulic pressure on the rear brakes, to balance the braking between front and rear.Ĭompartment - it will have wiring attached. When examining brake pipes and unions, do not overlook those that incorporate a pressure Never renew just one.Ĭan often be used to pinpoint obscure faults in brake pipes - when, for example, there is a spongy feel to the pedal but no visible cause. Sets', for either the two front wheels or the two rear ones. If you fail to find a leak (and if ] does not cure the problem) suspect an internal seal leak in the master cylinder or one of theīrake linings that have been contaminated by leaking hydraulic fluid or grease must be renewed (Seeįurthermore, the linings on the opposite wheel must also be renewed, otherwise the stopping power of the two brakes will differ and you will have unbalanced, dangerous braking. ![]() If it does, the joint is damaged and must be repaired professionally at a garage - drive there slowly. May reveal a slight leak that would not show otherwise. Have a helper press hard on the brake pedal when you inspect the system again - the extra Tighten the nut if there is any evidence of leaking. Inspect them carefully and feel behind them, too, in case the weep is not visible from the front. These unions are used to attach the piping to various components of the system, such as the master cylinder or the disc-brake caliper. , cracked or rust-pitted brake pipes, or loose screw-in pipe unions. Other possible sources include split or perished flexible Less likely - but not unknown - is a leak past a Of the master cylinder or, in a drum brake, the Leak must be traced and remedied as soon as possible. If the reservoir is made of plastic, the level of fluid inside is visible if it is metal, unscrew the reservoir cap and look inside.Ī regular inspection of the fluid level is advisable - it could be your first warning if the leak is only a slight 'weep' in the system. The recommended fluid level is marked by a line on the outside of the reservoir. Is usually mounted on or near the bulkhead of theĬompartment. ![]()
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