| SONATA(YF) >2012 > G 2.4 GDI > Brake System > General Information>Specifications |

Specifications

Item | Specification
Master cylinder | Type | Tandem
Cylinder I.D. | 22.22mm
Piston stroke | 45±1 mm (1.77±0.039 in)
Fluid level switch | Provided
Brake booster | Type | 11" Single
Boosting ratio | 9:01
Vacuum pump | Type | Electric vacuum pump (Multi vane type)
Vacuum checking type | Vacuum switch
Front disc brake | Type | Ventilated disc
Disc O.D. | Ø 300 mm (11.81 in)
Disc thickness | 28 mm (1.10 in)
Caliper piston | Single
Cylinder I.D. | Ø 60 mm (2.36 in)
Rear disc brake | Type | Solid disc
Disc O.D. | Ø 284 mm (11.18 in)
Disc thickness | 10 mm (0.39 in)
Caliper piston | Single
Cylinder I.D. | Ø 34 mm (1.34 in)
Parking brake | Type | DIH (Drum in hat)
Drum I.D. | Ø 168 mm (6.61 in)

O.D. : Outer Diameter
I.D : Inner Diameter

Specification(ESC)

Part | Item | Standard value | Remark
HECU | System | 4 Channel 4 Sensor (Solenoid) | Total control (ABS, EBD, TCS, ESC)
Type | Motor, valve relay intergrated type
Operating Voltage | 10 ~ 16 V
Operating Temperature | -40 ~ 120 °C (-40 ~ 248°F)
Motor power | 290 W
Active Wheel speed sensor | Supply voltage | DC 4.5 ~ 20 V |
Output current low | 5.9 ~ 8.4 mA |
Output current high | 11.8~ 16.8 mA |
Output range | 1 ~ 2500 Hz |
Tone wheel | 47 teeth |
Air gap | Front | 0.4 ~ 1.2 mm |
Rear | 0.4 ~ 1.0 mm
Yaw rate& Lateral G sensor (CAN TYPE) | Operating Voltage | 7 ~ 18 V |
Current Consumption | Max. 120 mA |
Yaw rate sensor measurement range | -100 ~ +100 °/sec |
Lateral G sensor measurement range | -1.8 +1.8g |

Service Standard

Items | Standard value
Brake pedal Full stroke | 135 mm (5.31 in)
Stop lamp switch clearance | 1.0 ~ 2.0 mm (0.04 ~ 0.08 in)
Brake pedal free play | 3 ~ 8 mm (0.12 ~ 0.31 in)
Front brake disc thickness | 28 mm (1.10 in)
Front brake disc pad thickness | 11 mm (0.43 in)
Rear brake disc thickness | 10 mm (0.39 in)
Rear brake disc pad thickness | 10 mm (0.39 in)

Tightening Torques

Items | N.m | kgf.m | lb-ft
Hub nut | 88.3 ~ 107.9 | 9.0 ~ 11.0 | 65.1 ~ 79.6
Master cylinder to brake booster | 12.7 ~ 16.7 | 1.3 ~ 1.7 | 9.4 ~ 12.3
Brake booster mounting nuts | 9.8 ~ 14.7 | 1.0 ~ 1.5 | 7.2 ~ 10.8
Air bleeding screw | 6.9 ~ 12.7 | 0.7 ~ 1.3 | 5.1 ~ 9.4
Brake tube flare nuts | 13.7 ~ 16.7 | 1.4 ~ 1.7 | 10.1 ~ 12.3
Front caliper guide rod bolts | 21.6 ~ 31.4 | 2.2 ~ 3.2 | 15.9 ~ 23.1
Rear caliper guide rod bolts | 21.6 ~ 31.4 | 2.2 ~ 3.2 | 15.9 ~ 23.1
Front caliper assembly to knuckle | 78.5 ~ 98.1 | 8.0 ~ 10.0 | 57.9 ~ 72.3
Rear caliper assembly to knuckle | 63.7 ~ 73.5 | 6.5 ~ 7.5 | 47.0 ~ 54.2
Brake hose to caliper | 24.5 ~ 29.4 | 2.5 ~ 3.0 | 18.1 ~ 21.7
Brake pedal member bracket bolts | 9.8 ~ 14.7 | 1.0 ~ 1.5 | 7.2 ~ 10.8
Brake pedal shaft nut | 24.5 ~ 34.3 | 2.5 ~ 3.5 | 18.1 ~ 25.3
Wheel speed sensor mounting bolt | 7.8 ~ 9.8 | 0.8 ~ 1.0 | 5.8 ~ 7.2
HECU bracket mounting bolt and nut | 19.6 ~ 29.4 | 2.0 ~ 3.0 | 14.5 ~ 21.7
Yaw rate&G sensor mounting bolts | 3.9 ~ 5.9 | 0.4 ~ 0.6 | 2.9 ~ 4.3

Lubricants

Items | Recommended | Quantity
Brake fluid | DOT 3 or DOT 4 | As required
Brake pedal bushing and bolt | Chassis grease | As required
Parking brake shoe and backing plate contacting surface | Heat resistance grease | As required
Front Caliper guide rod and boot | AI-11P | 1.0g ~ 1.5g, 1.2g ~ 1.7g
Rear Caliper guide rod and boot | AI-11P | 0.8 g ~ 1.3g