In road traffic, the brakes are critical to your safety and the safety of others
Therefore, a regular check of the brake system is the best insurance for your life. Do not be afraid to work to remove the wheels and check the condition of the brake pads.
Caring for the brake system is not such a terrible thing. And most types of work with brakes require no more effort than dismantling a wing or shock absorber. However, only take on the task if you are quite confident in your abilities.
- Cause of malfunction
elimination method
Increased brake pedal travel:
Presence of air in the hydraulic drive system
Bleed the system
- The thrust ring of the piston of the rear wheel cylinder has lost its elasticity and, under the action of the return spring of the brake pads, moves inside the cylinder together with the piston
Replace wheel cylinder assembly
- Violation of the tightness of the brake system (liquid leak)
Locate the location of the fluid leak and replace the parts affecting the leak.
In the event of leaks in pipeline connections, tighten connections or replace gaskets
- Increased clearance between the head of the vacuum booster adjusting bolt and the master cylinder piston
The brake pedal slowly moves down with the same force on it and the parking brake is applied:
- Cuff damage
Replace damaged cuff
The brake mechanisms of all wheels or axles are not fully released (high-hanging wheels turn slowly):
- Lack of clearance between the head of the vacuum booster adjusting bolt and the master cylinder piston
See How to check and replace the vacuum brake booster Lada Priora
- Incomplete return of the brake pedal after braking due to incorrect installation of the brake light switch
Set the gap (8+1) mm between the plastic tip of the brake light switch and the stop on the pedals
- Clogging of the compensation holes of the main brake cylinder or overlapping of the compensation holes with the edges of the cuffs
Remove the master cylinder reservoir and connecting sleeves.
Clean the compensation holes with a soft wire with a diameter of 0.6 mm. If at the same time the wire rests against the cuff, then it is necessary to disassemble the main cylinder and replace the swollen cuffs
One brake mechanism does not release (the suspended wheel rotates tightly):
- Jamming of the guide pins at the base of the front brace
Replace or lubricate guide pins. Replace damaged finger covers (see Lada Priora front wheel brake repair)
- Jamming of the pistons in the brake caliper body
Remove the brake caliper housing from the base, remove dirt and traces of corrosion from the surface of the housing cylinder and lubricate the working surfaces with NG-213 liquid or castor oil
- Loss of elasticity of the sealing ring of the brake caliper body
Remove the brake caliper housing from the base and replace the sealing ring
- Jamming pads due to severe contamination of the guide groove of the base
Remove the pads and clean the guide groove and the ledges of the base from corrosion and dirt
- Weakening or breakage of the return spring of the rear brake pads
Replace spring
- Jamming of the rear brake pistons due to contamination or corrosion
Disassemble the wheel cylinder, clean the parts from dirt and corrosion, rinse, replace the mud covers
- Swelling of the O-rings of the rear wheel cylinder pistons
Change O-rings and brake fluid
- Lack of clearance between the brake lining and the rear brake drum due to incorrect installation of the automatic adjustment thrust ring
Disassemble the wheel cylinder, remove the misalignment of the thrust ring
Sliding or pulling the car to the side when braking:
- Unequal tire pressure
Tire pressure correct
- Lubrication of friction linings in one of the brake mechanisms
Replace the pads or wash the pads with gasoline, followed by sanding with fine sandpaper and carefully removing abrasive dust from the pad
- Seizures or deep scratches on the surface of the brake disc or drum
Repair or replace disc or brake drum/hub assembly
- Brake fluid leak ty in one of the front brake mechanisms or wheel cylinders
Fix the leak
- The rear wheels are blocked before the front ones due to a malfunction of the pressure regulator or improper adjustment of its drive
Adjust or replace the pressure regulator
Insufficient braking performance (increased effort on the brake pedal):
- Wear or oiling of the brake pads
Replace or wash brake pads
- Incomplete fit of the pads to the drum in the rear brake mechanisms
Clean up the protruding areas of the overlays. Replace pads if necessary
- Leakage in the vacuum hose connection
Restore the tightness of the joint
- The filter of the vacuum brake booster is dirty
Wash the filter or replace with a new one
- Broken brake booster diaphragm
Replace Aperture
- Sealing cuffs of the vacuum brake booster do not provide tightness
Replace the seals and clean the cylindrical working surfaces of the valve body and connector
- Violation of tightness in the connection of the cover with the body of the vacuum booster
Restore tightness
- Violation of tightness in the connection of the vacuum booster with the main cylinder body
Replace O-ring
- Failure of the vacuum booster as a result of the ingress of brake fluid into the cavity of the vacuum booster
Replace master cylinder seals, remove fluid from booster and replace diaphragm
Rattle in the brakes:
- Ovality or runout of the working surface of the brake drums of the rear wheels
To bore the brake drum assembly with the hub or replace with new ones
- Broken disc brake pad springs
Replace the brake pads
- Front wheel brake guide pin wear
Replace the guide pins
- Wear of the holes for the guide pins in the base of the brake caliper
Replace Base
It takes a lot of force on the parking brake handle to hold the car:
- Jamming of cables in guide shells
Disconnect the cables, clean them of dirt, lubricate the cables and their connections with Liga grease
- Lubricating rear brake pads
Wash pads or replace pads with pads
- Incorrectly adjusted parking brake
Adjust the parking brake actuator
Large stroke of the parking brake lever handle:
- Large free play of the parking brake expansion link in the rear wheel brakes
Adjust the parking brake actuator
Heating of the brake drums when driving without braking:
- Incorrect adjustment of the parking brake expansion link
Adjust parking brake actuator
- - Reduced level of brake fluid in the reservoir of the main brake cylinder in the absence of external leakage in the hydraulic drive
- - Wear or swelling of the outer cuff of the main brake cylinder
Remove the master cylinder and replace the seal.
Drain brake fluid from vacuum booster cap