To rectify the fault in the brake system not everyone can afford. But to determine its cause can!Alexey Revin “driving”ExpertMichael Kolodochkin “driving”Expert
Brakes, of course, came up with pants — this will tell any reckless driver. But when you realize that with them “something not so” driving becomes scary: the trip may be the last. Thoughts such as “will do” driven away: the joke was over. It is important to determine the type of fault — at least tentatively.
Great pedal free play
As a rule, excessive free travel accompanied by an increase in braking distance. This most often occurs when the brake system is “grabbed” air; after a few taps of the pedal, as if inflated, becoming more taut. For whatever reason it occurred, a separate issue – the system will in any case have to pump at the same time identifying the possible leakage of brake fluid.
Sometimes the pedal becomes loose due to the swelling of the brake hoses. The same effect give the torn thread the cord hose. But this happens only with the left components. Sometimes it can boil the brake fluid, but this happens either with the frankly defective product, or very old tormozuhoy, which never changed.
Another possible reason is the very large runout of one or more brake discs. In addition, it may not work automatic maintenance of the gap in the drum brake mechanisms.
Very hard pedal
Tight pedal, short travel when pressed… When braking the car loses course stability, trying to leave aside. This often happens in case of jamming of the cylinder of the caliper in one of the circuits of the system. If the car will not skid, and the nuisance is only expressed in the sharp increase in force when braking, to blame may be the vacuum brake booster or the vacuum inlet hose.
Sometimes the increased pedal effort caused by the use of low-quality pads, excessive pollution, contamination of the pads and the surfaces of the disks or drums. But this is quite rare.
Another possible total brake pad wear or breakage. It happens that the disc surface is formed of ice or salt crust. It is not excluded and the poor quality of the brake lining, and heavy corrosion of the brake disc (often more on the inside).
Malfunction indicator light brake system
Most often the reason is simple — like low brake fluid level in the tank or excessive wear of the brake pads equipped with the appropriate sensors. Another simple reason may be the… Parking brake (sometimes just a buggy limit switch). However, the cause of demotion may be leakage tormozuhi — they urgently need to identify and eliminate.
Parking brake ineffective
Pulled the lever, and the machine still tries to slip downhill? In the simplest cases, the Parking brake just needs properly adjusted. In addition, it may affect samblanet brake pads. It happens that cables are jammed in the shells. Among the possible reasons occur oily the disks or drums. Blame can be a full pad wear. But if the Parking brake releases the car, it is likely that the pads had frozen or prijavili to the brake drums.
The malfunction of any component of the ABS disables the entire system and illuminate the symbol of a system fault in the instrument cluster. The car will retain the ability to brake, and braking in most cases will not be affected. But the important thing is that on slippery surfaces the wheels will be blocked, and that the risk of loss of stability!
The car pulled to one side
It is clear that the disposal of the vehicle course may be to blame not just the brakes — there is able to vandalize and corners of installation of wheels, and the wheels and steering. However, quite often issues arise precisely to the brakes, especially if the car pulls to the side when braking. It’s jammed pistons in the cylinders of one of the paths. Perhaps the slowdown of the wheels due to loosening of the bolts fixing the retaining frame to the steering knuckle, and the pad contamination or contamination of brake fluid.
Perhaps, on the surface of the pad formed ice or salt crust or pads just wet. Or not work one of contours of brake system when the pedal is low and efficiency is low. Blame can also be runout of the brake disc, the wear of the wheel bearing and ovality of the brake drum.
Noticeable shaking, vibration while braking
Sometimes when braking the car shakes badly — this problem usually happens with old cars. Guilty there can be runout of wheel hubs and brake discs, wheel bearings clearances, ovality of the brake drum, replace calipers or working cylinders. Other possible causes: brake pads pad separates from the substrate, weak or broken tension spring drum brakes.
Overheating of the brakes
This kind of fault is usually determined by smell. This usually accompanies increased pedal travel, which began to feel wobbly, as well as increased braking distance. The reason for overheating can be as overly aggressive driving with constant braking and banal forgetfulness, that is a tight Parking brake.
In addition, the number of possible culprits includes podklinivaet cylinders and calipers.
Excessive wear of discs and drums
It is clear that the wear isn’t that noticeable. However, he was accompanied by a reduced efficiency of the braking, high pedal force, as well as illumination of the malfunction indicator brake.
The cause of deterioration can be as banal old age of the car and the driving style of the owner, using the pedals in the “on/off” with no intermediate positions. Of course, to increased wear can lead jamming cylinders and calipers.
Noise when braking
High-frequency noise, screeching, whistling can occur when braking, so — sometimes — and during normal driving. The reason is an unplanned mode of friction of the friction material on the working surface of the brake disc. Fault can be the ultimate brake pad wear, excessive corrosion of the brake disc (often with an internal, “invisible” side). Is that the pad brake pad separates from the substrate. The list of possible causes of continued contamination of the pads, warping of the disk due to local overheating, incorrect mounting pads in the caliper, left the pads or discs, etc.
Incomplete release of all wheels
Usually manifests itself as a lack of pedal free play brake. Probable cause: incorrectly adjusted vacuum booster (say, with replacement), swollen cuff in the cylinders due to the contact with extraneous corrosive liquids, jammed the piston in the master cylinder due to corrosion, broken spring in GTZ.
When the brake pedal is released one of the wheels brakes
On suspicion of the following causes: jamming of the piston of the wheel cylinder, brake cuffs swelling, deformation of the brake pipe, the brake pads sticking due to contamination of the guide, separation pads brake pads drum brake. Is that weak or broken tension spring drum brake shoes, pull the Parking brake cable is jammed in the shell.
- Do you know what faults you can ride, and which not? Take the test and check the level of your driving skill.
- To increase the life of the car, use from additives SUPROTEC. Original products SUPROTEC can be purchased at the company store “at the wheel”.
Photo: George Cages