Hyundai Tucson (NX4) 2022-2025 Service Manual / Brake System / Specifications

Hyundai Tucson: Brake System / Specifications

- Specifications

Item		Specification
Master cylinder	Type	Tandem
	I.D. mm (in)	22.22 mm (0.87 in)
	Piston stroke mm (in)	45 mm (1.77 in)
Brake booster	Type	11" Tie-rod
Brake booster	Boosting ratio	10.5 : 1
Front disc brake	Disc O.D	325 mm (12.80 in)
	Disc thickness	30 mm (1.18 in)
	Cylinder type	Single piston
	Cylinder I.D.	Ø 60.6 mm (2.39 in)
Rear disc brake	Type	Solid disc
	Disc O.D	300 mm (11.8 in)
	Disc thickness	10 mm (0.39 in)
	Cylinder type	Single piston
	Cylinder I.D.	Ø38 mm (1.50 in)
Parking brake	Type	Lever, pedal, Electronic Parking Brake (EPB)
HECU	System	4 Channel 4 Sensor control system (Total control ABS, TCS, EBD, ESP)
	Type	valve relay intergrated type (ECU, TCU and CAN)Motor,
	Operating Voltage	8 ~ 16V
	Operating Temperature	-40 - 110°C (-40 ~ 230°F)
	Motor power	300 W
Active Wheel speed sensor	Supply voltage	DC 4.55 ~ 16 V
	Output current (low)	7 +1.4/-1.12 mA
	Output current (high)	41 +2.8/-1.12 mA
	Output range	0 ~ 2500 Hz
	Tone wheel	Front : 48 teeth, Rear : 47 teeth
	Air gap	0.4 - 1.5 mm (0.02 - 0.06 in)
Steering Wheel Angle Sensor	Operating Voltage	8 ~ 16V
	Current Consumption	150 mAMax.
	Output measurement range	~ + 779.9°-780
	Operating Angular velocity	0 ~ 1016°/sec

Service Standard

Items	Standard value
Brake pedal height	135 mm (5.31 in)
Brake pedal Full stroke	176 mm (6.93 in)
Stop lamp switch clearance	1 - 2 mm (0.04 in - 0.08 in)
Brake pedal free play	2 - 4 mm (0.08 in - 0.16 in)
Front brake disc pad thickness	11 mm (0.43 in)
Front brake disc pad service limit	2.0 mm (0.07 in)
Front brake disc thickness	30 mm (1.18 in)
Front brake disc service limit	28 mm (1.10 in)
Rear brake disc pad thickness	10 mm (0.31 in)
Rear brake disc pad service limit	2.0 mm (0.07 in)
Rear brake disc thickness	10 mm (0.39 in)
Rear brake disc service limit	8.0 mm (0.32 in)

Tightening Torques

Items	N.m	kgf.m	lb-ft
Master cylinder to brake booster	9.8 - 15.7	1.0 - 1.6	7.2 - 11.6
Brake booster mounting nuts	16.7 - 25.5	1.7 - 2.6	12.3 - 18.8
Air bleeding screw	6.9 - 12.7	0.7 - 1.3	5.1 - 9.4
Brake tube flare nut, brake hose	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 mounting bolt	98.1 - 117.7	10.0 - 12.0	72.3 - 86.8
Rear caliper assembly mounting bolt	78.5 - 98.1	8.0 - 10.0	57.9 - 72.3
Brake hose to caliper	24.5 - 29.4	2.5 - 3.0	18.1 - 21.7
Brake pedal member bracket bolt	16.7 - 25.5	1.7 - 2.6	12.3 - 18.8
Wheel speed sensor mounting bolt	8.8 - 13.7	0.9 - 1.4	6.5 - 10.1

Lubricants

Items	Recommended	Quantity
Brake fluid	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

Troubleshooting

- Troubleshooting Problem Symptoms Table Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely cause of the problem.Check each part in ...

Special Service Tools

- Special Service Tools Tool (Number and Name)IllustrationUse 09581-11000Piston expander Spreading the front disc brake piston 09527 - 2W110Sensor cap installer Used for installing wheel speed s ...

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