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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Hyundai Elantra (from 2000 to 2004, the year of issue)

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Hyundai Elantra
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Elantra
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Technical data
Check the brake servo
Check unilateral vacuum valve
Bleeding the hydraulic system of a drive of brakes
Adjust the parking brake stroke
Brake pedal
Vacuum brake booster
The main brake cylinder
Replacing the front brake pads
Caliper front brake
Rear disc brakes
Rear drum brakes
Replacing the working brake cylinder
Pressure regulator
Brake tubes and hoses
Parking brake
Anti-lock brakes (ABS)
Hydraulic block HECU
Wheel speed sensor
Bleeding the hydraulic system of a drive of brakes with scanner use
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Hit Counter by Digits


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Brakes



Technical data

Data
Value
The main brake cylinder

- type

Tandem

- Bore mm

  • CBS (Conventional Brake System - regular braking system)
22.22
  • ABS
23.81
Vacuum brake booster

- type

Vacuum

- Effective diameter, mm

  • CBS
228.6
  • ABS
177,8-203,2

- ratio

  • CBS
5.5: 1
  • ABS
6.0: 1
The pressure
4DR 5DR

- Start pressure, MPa

2.55 3.9

- The ratio of decompression

0.27: 1 0.32: 1
Front brakes

- type

Disk, ventilated

- The diameter of the brake disc, mm

257

- The thickness of the brake disc, mm

24

- Brake pad thickness, mm

eleven

- Bore mm

54
Rear disc brakes

- The diameter of the brake disc, mm

258

- The thickness of the brake disc, mm

10

- Brake pad thickness, mm

9
Rear drum brakes

- The inner diameter of the brake drum, mm

203.2

- Brake pad thickness, mm

9.4

- Bore mm

405
Parking brake
Mechanical acting on the rear wheels

Anti-lock brakes

Data Value
The control unit ECU

- Supply voltage, V

10-16

- Temperature range, ? C

-40 ... 110
Control lamp: ABS, EBD

- Supply voltage, V

12

- Current consumption, mA

80
Wheel speed sensor

- Resistance, Ohm

1275-1495

- Output frequency, Hz

15-2000

- Output voltage, V

0.15

- An air gap, mm

0.2-1.2
Hydraulic block HECU

- Weight, kg

2.5

- engine

12 B 30 A

- Engine power, W

180

- Productivity in cm 3 / s

5.5

Adjusting data

Data
Value
Installation height of the brake pedal, mm
170
Brake pedal travel, mm
128
Clearance brake light switch, mm
0.5-1.0
The free pedal travel, mm
3-8
The gap between the brake servo pushrod and the brake master cylinder, mm
0
Progress parking brake lever while tightening its force 196 N
8 clicks
Minimum thickness pads front brake pads, mm
2
Minimum thickness of a brake disk, mm
22.4
Minimum thickness pads rear brake pads (drum brake), mm
1
The maximum diameter of the bore of the brake drum, mm
205.2
Minimum thickness of the back brake disk, mm
8

Tightening torques, N ??? m

Data
Value
Nuts of fastening of the main brake cylinder to the bracket
8-12
Nuts bracket brake master cylinder
13-16
Fitting the vacuum hose to the air expansion chamber
15-18
Bleeder valve
7-9
Connecting the brake pipe nuts
13-17
Bolt the caliper guide pin
22-32
Caliper mounting bolts to the steering knuckle
65-75
Banjo bolt brake hose for Front Caliper
25-30
Bolts of fastening of the working brake cylinder
12-18
The front wheel speed sensor
8,2-9,7
Rear wheel speed sensor
8,2-9,7
Bolts of the control unit and hydraulic unit HECU
8-10
Bracket bolts of the control unit ECU and Hydraulic block HECU
9-10
Six brake pipes to the hydraulic unit
13-17

When installing, use the new self-locking nuts.

general information

For vehicles used by the service braking system with hydraulic drive.

The system operates as follows:

- The brake pedal is connected to the master cylinder;
- When the pedal is depressed, the pressurized fluid from the master cylinder by the metal tube and the flexible hose is transmitted to the front and rear brakes;
- The wheel cylinders are hydraulic modulators that convert the fluid pressure generated in the master cylinder, in the movement of the elements of the brake mechanism;
- Front and rear brake caliper pistons and move due to friction on the brake discs and drums provide the required vehicle deceleration;
- When you release the brake pedal pressure in the system decreases.

Brake pads and the pistons return to a neutral or home position and deceleration stops.

By reducing the brake fluid level sensor liquid level in the master cylinder includes a warning lamp in the instrument cluster. If the warning lamp lights up in the first place, check that the parking brake is released, as the lamp is indicating a reduced level of the liquid and apply the parking brake.





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