Hyundai i-30: Brake System / Master Cylinder

Hyundai i30 (PD) 2018-2025 Service Manual / Brake System / Brake System / Master Cylinder

Components and components location
Components
[LHD]

1. Reservoir cap
2. Reservoir
3. Brake booster
 4. Master cylinder
5. Push rod

[RHD]

1. Reservoir cap
2. Reservoir
3. Brake booster
 4. Master cylinder
5. Push rod

Repair procedures
Removal
[LHD]
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Disconnect the brake fluid level switch connector.
3.
Remove the brake fluid from the master cylinder reservoir with a syringe.
  
•
Do not spill brake fluid on the vehicle, it may damage the paint; if brake fluid does contact the paint, wash it off immediately with water.
4.
Disconnect the brake tube (A) from the master cylinder by loosening the tube flare nut.
Tightening torque
ESP : 18.6 - 22.6 N.m (1.9 - 2.3 kgf.m, 13.7 - 16.6 lb-ft)
ABS : 12.7 - 16.7 N.m (1.3 - 1.7 kgf.m, 9.4 - 12.3 lb-ft)

5.
Remove the master cylinder from the brake booster after loosening the mounting nuts (A).
Tightening torque :
12.7 - 16.7 N.m (1.3 - 1.7 kgf.m, 9.4 - 12.3 lb-ft)

6.
Separate the reservoir by loosening the screw.
[RHD]
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Disconnect the brake fluid level sensor connector (A).
3.
Disconnect the vacuum hose from the brake booster.
4.
Remove the brake fluid from the master cylinder reservoir with a syringe.
  
•
Do not spill brake fluid on the vehicle, it may damage the paint; if brake fluid does contact the paint, wash it off immediately with water.
5.
Remove the brake fluid hose from the reservoir. [M/T only]
6.
Disconnect brake tube.
Tightening torque
ABS : 12.7 - 16.7 N.m (1.3 - 1.7 kgf.m, 9.4 - 12.3 lb-ft)
ESP : 18.6 - 22.6 N.m (1.9 - 2.3 kgf.m, 13.7 - 16.6 lb-ft)

7.
Remove the master cylinder from the brake booster after loosening the mounting nuts (A).
Tightening torque :
12.7 - 16.7 N.m (1.3 - 1.7 kgf.m, 9.4 - 12.3 lb-ft)

8.
Separate the reservoir by loosening the screw.
Installation
1.
To install, reverse the removal procedure.
2.
After installing, bleed the brake system.
(Refer to Brake System -"Brake System Bleeding")
(Refer to Brake System - "ABS System Bleeding)
(Refer to Brake System - "ESP System Bleeding)

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