Brake system of cars since 1999 of release
Master brake cylinder
- type - two-circuit
- inner diameter, mm — 23.81
Vacuum brake booster
- type - vacuum
- effective diameter, mm — 265
- ratio - 6.5
The degree of decompression of the pressure limiter, MPa - 0.26
Front brakes
- type - disc, ventilated
- brake disc diameter, mm - 211.0
- brake disc thickness, mm - 24
- cylinder diameter, mm - 53.97
- thickness of brake pads, mm - 10.0
- clearance adjustment - automatic
Rear drum brakes
- inner diameter of the brake drum, mm - 203
- cylinder diameter, mm - 19.05
- thickness of friction linings of brake pads, mm - 4.38
- clearance adjustment - automatic
Parking brake - mechanical, acting on the rear wheels.
Basic data for adjusting and monitoring vehicles from 1999
Installation height of the brake pedal, mm - 163.5-166.5
Free travel of the brake pedal, mm - 3-8
The distance between the floor and the brake pedal in the depressed state, mm - not less than 80
Rear brake pressure regulator
- switching point, MPa — 24.5
- outlet fluid pressure (inlet pressure), MPa - 4.30 + 0.4 (9,81)
- pressure difference at the outlet of the regulator between the left and right circuits, MPa - 0.4
The gap between the rod of the vacuum booster and the piston of the main brake cylinder, mm - 0.6-0.8
Front disc brakes
- brake pad lining thickness, mm
- nominal - 10.0
- minimum allowable — 2.0
- brake disc thickness, mm
- nominal - 24.0
- minimum allowable - 22.4
- disc runout, mm - 0.05
- resistance to rotation after installing new brake pads (tangential force at the radius of the set bolts), N — no more than 40
- axial play of the front wheel hub, mm - no more than 0.05
Rear drum brakes
- thickness of friction linings of brake shoes, mm
- nominal - 4.38
- minimum allowable — 1.0
- inner diameter of the brake drum, mm
- nominal - 203
- maximum allowable - 205
Parking brake lever travel
When tightening with a force of 196 N - 5-7 clicks
Anti-Lock Braking System
- gap between the rear wheel speed sensor and the rotor teeth, mm - 0.1-1.9
- internal resistance of the wheel speed sensor, kOhm - 1.28-1.92
- wheel speed sensor insulation resistance, kOhm — not less than 100
Rear disc brakes for cars since 2000
Type - single piston caliper with solid brake disc
Diameter x thickness, brake disc, mm - 211.6x10.0
Diameter of the working brake cylinder, mm - 35.0
Thickness of brake pads, mm - 9.0
Gap Adjustment - Automatic
Basic data for adjusting and monitoring vehicles from year 2000
Rear brake pressure regulator for cars without ABS - switching point, MPa - 1.96
- outlet fluid pressure (inlet pressure), MPa — 3.92±0.4 (9,81)
- pressure difference at the outlet of the regulator between the left and right circuits, MPa - no more than 0.4
Front disc brake
- thickness of brake pads, mm - 10.0 (min 2,0)
- brake disc thickness, mm - 24.0 (rjnin 22,4)
- runout, mm - no more than 0.03
- resistance to rotation after installing new brake pads (tangential force at the radius of the set bolts), N — no more than 40
Rear disc brake
- thickness of brake pads, mm - 9.0 (min 2,0)
- brake disc thickness, mm - 10.0 (min 8,4)
- runout, mm - no more than 0.08
- resistance to rotation after installing new brake pads (tangential force at the radius of the set bolts), N — no more than 20
Fluids and lubricants
Brake Fluid - DOT3 or DOT4
Rear Brake Guard Contact Surfaces and Brake Pads, Brake Pads and Automatic Slack Adjuster - Brake Lubricant SAE J310, NLGI No. 1
General information
The car uses a working brake system with a vacuum brake booster, hydraulic drive and diagonal separation of circuits, which greatly increases the safety of driving a car. The layout of the hydraulic brake system is such that each circuit includes the brakes of one front and one rear wheel. Under normal conditions, both circuits work together. However, in the event of failure of one of the hydraulic circuits, the brakes of the two diagonally located wheels will be able to carry out full braking.
The front disc brakes are equipped with single-piston sliding calipers that apply pressure evenly to each brake pad.
On models with rear drum brakes, driven and driven brake shoes are installed, which are actuated by two-piston working brake cylinders. The rear drum brakes have a self-adjusting mechanism to compensate for brake pad wear. As the friction material of the brake pads wears out, when the brake pedal is depressed, a self-adjusting mechanism is automatically activated, which changes the position of the brake pad and eliminates the resulting excessive clearance between the surface of the friction material of the brake pad and the brake drum.
On models with diesel engines, a vacuum pump is installed to create the vacuum necessary for the operation of the vacuum brake booster, which is driven directly from the camshaft.
This braking system provides a high degree of reliability and durability, combined with improved braking performance and sensitivity.
All vehicles are equipped with a mechanical parking brake acting on the brake pads of the rear wheels.
Note. When servicing any part of the brake system, work carefully and methodically, and maintain cleanliness when repairing any part of the hydraulic system. Always replace assemblies in a set where applicable when in doubt as to their condition, and use only original replacement parts, or at least those of known good quality.
On cars since 2000, the following changes have been made:
- instead of rear drum brakes, rear disc brakes are installed;
- on vehicles with ABS, instead of a pressure regulator, an electronic brake force distribution system is installed (EBD), providing optimal distribution of braking forces;
- on cars without ABS, the technical requirements of the pressure regulator have been changed;
- on a car with a 1.9 liter diesel engine, the sequence of removing and installing the vacuum brake booster has been changed.
In anti-lock brake system (ABS) to regulate the pressure of the brake fluid in the rear brake circuit during braking, electronic control is used by means of control solenoid valves of the rear brake mechanisms, which operate in accordance with the intensity of braking of the vehicle and the degree of slipping of the front and rear wheels, which is determined by the signals received from the wheel speed sensors car. Brake force distribution system (EBD) is a control system that provides high quality braking control of the car in order to reduce the braking distance and improve its handling.
Because the system delivers optimal rear brake force regardless of vehicle load and road surface conditions, the system reduces the required brake pedal effort, especially when the vehicle is heavily loaded or when driving on high grip roads.
Since the load on the front brakes is reduced, the temperature of the brake pads during braking decreases accordingly, and their wear decreases.