Brake system malfunctions, their causes and solutions (Kalina 1118)

Cause of malfunction	Method of elimination
Increased brake pedal travel
Brake fluid leak from wheel cylinders Air in the brake system The rubber seals in the master brake cylinder are damaged The rubber brake hoses of the brake hydraulic drive are damaged Increased brake disc runout (more than 0.15 mm) Brake fluid leak through the sealing cuffs of the brake pressure regulator pusher	Replace defective wheel cylinder parts, wash and dry brake pads, brake discs and brake drums, bleed the brakes on the car Remove air from the brake system (bleed the brakes on your car) Replace the seals and bleed the brakes Replace brake hoses and bleed brakes Grind the brake disc; if the thickness of the brake disc is less than 17.8 mm, replace it Replace the brake pressure regulator seals
Insufficient braking efficiency
Oiling of brake pad linings of brake mechanisms Seizure of pistons in wheel brake cylinders Complete wear of brake pad linings Overheating of brake mechanisms Use of brake pads with inappropriate brake linings Incorrect adjustment of the brake pressure regulator Loss of tightness of one of the brake system circuits (accompanied by a partial failure of the brake pedal)	Wash and dry the brake pads Eliminate the causes of piston seizure in wheel brake cylinders, replace damaged parts, bleed the brakes Replace the brake pads Stop immediately and allow the brakes to cool down Use only brake pads recommended by the manufacturer Adjust the brake pressure regulator drive Replace damaged parts, bleed the brake system
Incomplete release of braking of all wheels
There is no free travel of the brake pedal The protrusion of the adjusting bolt of the vacuum booster rod relative to the mounting plane of the brake master cylinder is damaged Swelling of the rubber sealing cuffs of the master brake cylinder due to gasoline, mineral oils, etc. getting into the brake fluid. Jamming of the master brake cylinder piston	Adjust the brake pedal free play Adjust the brake booster rod adjusting bolt protrusion 1.25-0.2mm Thoroughly flush the entire system with brake fluid, replace the seals, bleed the brakes Check and replace the master brake cylinder if necessary, bleed the brake system
Braking one wheel with the brake pedal released
The rear brake shoe tension spring is broken or weakened Seizure of the piston in the wheel brake cylinder due to contamination or corrosion of the cylinder body Swelling of the sealing cuffs of the wheel brake cylinder due to gasoline, mineral oils, etc. getting into the brake fluid. Violation of the position of the brake caliper relative to the brake disc when loosening the bolts securing the brake pad guide to the steering knuckle Incorrect adjustment of the parking brake system	Replace the rear brake shoe spring Disassemble the brake cylinder, clean and wash the parts, replace damaged ones, bleed the brake system Replace the seals, flush the brake hydraulic system with brake fluid, bleed the brakes on the car Tighten the brake caliper mounting bolts and replace any damaged parts if necessary Adjust the parking brake system
Skidding or pulling the car to the side when braking
Wheel brake cylinder piston jamming Clogging of any steel brake pipe due to denting or clogging Contamination or oiling of brake discs, brake drums and brake linings Incorrect adjustment of the brake pressure regulator drive The brake pressure regulator is faulty Wheel alignment angles are incorrect (wheel alignment) Different tire pressures One of the brake system circuits is not working (accompanied by a deterioration in braking efficiency and an increased brake pedal travel)	Check and eliminate piston sticking in the wheel brake cylinder, replace damaged parts if necessary, bleed the brake system Replace the brake line or clean it and bleed the brakes on the car Clean the brake components Adjust the brake pressure regulator drive Repair or replace the brake pressure regulator Adjust the wheel alignment angles (wheel alignment) Set the tire pressure to normal Replace damaged parts and bleed the brakes
Increased brake pedal force when braking
The brake booster is faulty The hose connecting the vacuum booster and the engine intake pipe is damaged, or its fastening on the fittings has become loose Swelling of the brake cylinder seals due to gasoline, mineral oils, etc. getting into the brake fluid.	Replace the brake booster Replace the hose connecting the vacuum booster and the engine intake pipe, or tighten the clamps that secure it Thoroughly flush the entire brake system, replace the rubber seals, and bleed the brakes on the car
Squeaking or vibration in brakes
Weakening of the rear brake shoe tension spring Ovality of brake drums Oiling of brake friction linings Wear of brake linings or inclusion of foreign bodies in them Excessive brake disc runout or uneven wear (can be felt by vibration of the brake pedal)	Check the rear brake shoe tension spring, replace with a new one if necessary Ream the brake drum Clean the brake pads with a wire brush, using warm water and detergent. Eliminate the cause of brake fluid or grease getting on the brake pads Replace the brake pads Grind the brake disc, if the thickness is less than 17.8 mm, replace it