6.2. Possible malfunctions, their reasons and methods of elimination

Cause of defect
Elimination method
The increased working course of a pedal of a brake
1. Leak of brake fluid from wheel cylinders
1. Replace the failed details of wheel cylinders, wash out and dry blocks, disks and drums, pump over system of a hydraulic actuator
2. Air in the brake system
2. Remove air from system
3. Rubber sealing rings in the main brake cylinder are damaged
3. Replace rings and pump over system
4. Rubber hoses of a hydraulic actuator of brakes are damaged
4. Replace hoses and pump over system
5. The raised beating of a brake disk (more than 0,15 mm)
5. Proshlifuyte disk; if disk thickness less than 10,8 mm, replace it
6. Leak of liquid through sealing rings of a pusher of the regulator of pressure
6. Replace sealing rings
Insufficient efficiency of braking
1. Oiling of overlays of blocks of brake mechanisms
1. Smooth out slips a metal brush, applying warm water with detergents. Remove the cause of hit of liquid or lubricant on brake shoes
2. Jamming of pistons in wheel cylinders
2. Remove the causes of jamming, replace the damaged details, pump over system
3. Wear-out of overlays of brake shoes
3. Replace brake shoes
4. Overheat of brake mechanisms
4. Immediately stop and give will cool down to brake mechanisms
5. Application of blocks with inappropriate slips
5. Apply blocks only recommended by manufacturer
6. Wrong adjustment of the regulator of pressure
6. Adjust pressure regulator drive
7. Loss of tightness of one of contours (is followed by a partial failure of a pedal of a brake)
7. Replace the damaged details, pump over system
Incomplete disinhibition of all wheels
1. There is no free wheeling of a pedal of a brake
1. Adjust a free wheeling of a pedal
2. The vystupaniye of an adjusting bolt of a rod of the vacuum amplifier concerning the plane of fastening of the main cylinder is broken
2. Adjust a vystupaniye (1,25-0,2 mm) of an adjusting bolt
3. Swelling of rubber sealants of the main cylinder owing to hit in liquid of gasoline, mineral oils, etc.
3. Carefully wash out all system brake fluid, replace rubber details, pump over system of a hydraulic actuator
4. Jamming of the piston of the main cylinder
4. Check and if necessary replace the main cylinder, pump over system
Snubbing of one wheel at the released brake pedal
1. The coupling spring of blocks of a back brake broke or weakened
1. Replace a spring
2. Jamming of the piston in the wheel cylinder owing to pollution or corrosion of the case of the cylinder
2. Disassemble the cylinder, clear and wash out the details damaged replace, pump over system
3. Swelling of sealing rings of the wheel cylinder because of hit in liquid of gasoline, mineral oils, etc.
3. Replace rings, wash out brake fluid system of a hydraulic actuator of brakes, pump over system
4. Violation of provision of a support of rather brake disk when weakening bolts of fastening of a guide of blocks to a rotary fist
4. Tighten fastening bolts, if necessary replace the damaged details
5. Wrong adjustment of the parking brake system
5. Adjust the parking brake system
Drift or withdrawal of the car aside when braking
1. Jamming of the piston of the wheel cylinder
1. Check and eliminate jamming of the piston in the cylinder, if necessary replace the damaged details, pump over system
2. A blockage of any steel tube owing to a dent or a contamination
2. Replace a tube or clean it and pump over system
3. Pollution or oiling of disks, drums and slips
3. Clear details of brake mechanisms
4. Wrong adjustment of the drive of the regulator of pressure
4. Adjust the drive
5. Pressure regulator is faulty
5. Repair or replace the regulator
6. The angles of installation of wheels are broken
6. Adjust the angles of installation of wheels
7. Different pressure in tires
7. Establish normal pressure
8. One of contours of the brake system does not work (is followed by deterioration in efficiency of braking and the increased pedal course)
8. Replace the damaged details and pump over system
The increased effort to brake pedals when braking
1. The vacuum amplifier is faulty
1. Replace the amplifier
2. The hose, the connecting vacuum amplifier and an inlet pipe of the engine is damaged, or its fastening on unions weakened
2. Replace a hose or tighten collars of its fastening
3. Swelling of sealants of cylinders because of hit in liquid of gasoline, mineral oils, etc.
3. Carefully wash out all system, replace rubber details, pump over system
Peep or vibration of brakes
1. Weakening of a coupling spring of brake shoes of a back brake
1. Check a coupling spring, if necessary replace new
2. Emergence of ovality of brake drums
2. Chisel a drum
3. Oiling of frictional slips
3. Smooth out slips a metal brush, applying warm water with detergents. Remove the cause of hit of liquid or lubricant on brake shoes
4. Wear of slips or inclusion in them of foreign matters
4. Replace blocks
5. An excessive beating of a brake disk or its uneven wear (it is felt on vibration of a brake pedal)
5. With Proshlifuyte a disk, at a thickness less than 10,8 mm replace it