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