Kia Optima: Specifications - General Information - Brake System - Kia Optima TF 2011-2018 Service ManualKia Optima: Specifications

Specifications

Item
Specification
Master cylinder
Type
Single
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
9:1
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), Ø 320 mm (12.60 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), Ø 38.2 mm (1.50 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 integrated type
Operating Voltage
10 ~ 16 V
Operating Temperature
-40 ~ 120 °C (-40 ~ 248°F)
Motor power
270 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
Front: 48 teeth, Rear: 47 teeth
 
Air gap
 
Front
0.4 ~ 1.5 mm
 
Rear
0.4 ~ 1.0 mm
Yaw rate& Lateral G sensor
(CAN TYPE)
Operating Voltage
7 ~ 18 V
 
Current Consumption
Max. 150 mA
 
Yaw rate sensor measurement range
-75 ~ +75 °/sec
 
Lateral G sensor measurement range
-14.715 ~ 14.715 m/s²
 

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
12.7 ~ 15.7
1.3 ~ 1.6
9.4 ~ 11.6
Air bleeding screw
6.9 ~ 12.7
0.7 ~ 1.3
5.1 ~ 9.4
Brake tube flare nuts
12.7 ~ 16.7
1.3 ~ 1.7
9.4 ~ 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
29.4 ~ 34.3
3.0 ~ 3.5
21.7 ~ 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
1.2g ~ 1.7g (Trailing)
1.0g ~ 1.5g (Leading)
Rear Caliper guide rod and boot
AI-11P
0.8 g ~ 1.3g


General Information
...

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