Warning! Even if there are no visible faults in the brake system, it is necessary to check the brake system at each maintenance. Do not neglect this, an unexpected failure of the working brake system can be very expensive!
Possible typical faults of the brake system can be divided into several types. Depending on the type of fault, the testing algorithm and the range of units to be tested differ.
1. Brake fluid leak. The brake fluid level in the brake master cylinder reservoir is constantly decreasing. The malfunction will most likely be accompanied by an increased brake pedal travel. Possible causes:
- 1) malfunction of the front brake caliper (see "Front brakes - check");
- 2) malfunction of the rear brake caliper (see "Rear disc brakes - check") or the rear brake wheel cylinder (see "Rear drum brakes - check");
- 3) damage to the brake hose of one of the wheels (see "Service brake system drive - check");
- 4) damage to the brake pipe (see "Service brake system drive - check").
2. Increased brake pedal travel. Possible causes:
- 1) brake fluid leak (see above);
- 2) malfunction of the automatic clearance adjustment device in the rear brake mechanism (see "Rear drum brakes - check");
- 3) the brake booster is faulty (see "Vacuum brake booster - check");
- 4) the master brake cylinder is faulty (see "Master Brake Cylinder - Replacement").
3. Increased force on the brake pedal. Possible causes:
- 1) vacuum booster malfunction (see "Vacuum brake booster - check");
- 2) oiling of the brake shoe linings and the surface of the brake discs or drums of one axle (see p. 223, "Front brakes - check", "Rear disc brakes - checking" or "Rear drum brakes - check").
4. Uneven operation of brake mechanisms (the vehicle's deviation from straight-line movement or skidding when braking). Possible reasons:
- 1) jamming of the front or rear brake caliper or rear wheel cylinder (see "Front brakes - check", "Rear disc brakes - checking" or "Rear drum brakes - check");
- 2) oiling of the brake shoe linings and the surface of the brake discs or drums of one axle (see "Front brakes - check" and "Rear disc brakes - check" or "Rear drum brakes - check");
- 3) the brake line tube is pinched (see "Service brake system drive - check").
(The article was published on the website: «opelbook.ru»)
5. A loud squealing or grinding noise when braking is most likely caused by extreme wear of the brake pads of the front or rear brake mechanisms (see "Front brakes - check", "Rear disc brakes - check" or "Rear drum brakes - check").
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