| SONATA(YF) >2013 > G 2.4 GDI > Brake System > Brake System > Rear Disc Brake>Repair procedures |

Removal

1. | Remove the rear wheel & tire.

Tightening torque:
88.3 ~107.9 N.m(9.0 ~11.0 kgf.m, 65.1 ~79.6 lb-ft)

2. | Remove the rear shock absorber (A). (Refer to the Suspension group - rear shock absorber)

3. | Remove the rear upper arm (B).

4. | Loosen the hose eyebolt (B) and caliper mounting bolts (C), then remove the rear caliper assembly (A).

Tightening torque:
Brake hose to caliper(B):
24.5 ~ 29.4 N.m (2.5 ~ 3.0 kgf.m, 18.1 ~ 21.7 lb-ft)
Caliper assembly to carrier(C):
63.7 ~ 73.5 N.m (6.5 ~7.5 kgf.m, 47.0 ~ 54.2 lb-ft)

Do not loosen the bolts(E) instead of guide rod bolt.

5. | Remove the rear brake disc by loosening the screws (A).

Replacement

Rear brake pads

1. | Loosen the guide rod bolt (B) and pivot the caliper (A) up out of the way.

Tightening torque:
21.6 ~31.4 N.m (2.2 ~3.2 kgf.m, 15.9 ~23.1 lb-ft)

2. | Replace pad shim (D), pad retainers (C) and brake pads (B) in the caliper bracket (A).

Inspection

Rear Brake Disc Thickness Check

1. | Check the brake pads for wear and fade.

2. | Check the brake disc for damage and cracks.

3. | Remove all rust and contamination from the surface, and measure the disc thickness at 8 points, at least, of same distance (5mm) from the brake disc outer circle.

Brake disc thickness
Standard: 10 mm (0.39 in)
Service limit: 8.4 mm (0.33 in)
Deviation: less than 0.01 mm (0.0004 in)

4. | If wear exceeds the limit, replace the discs and pad assembly left and right of the vehicle.

Rear Brake Pad Check

1. | Check the pad wear. Measure the pad thickness and replace it, if it is less than the specified value.

Pad thickness
Standard value: 10 mm (0.393 in)
Service limit: 2.0 mm (0.0787 in)

2. | Check that grease is applied, to sliding contact points and the pad and backing metal for damage.

Rear Brake Disc Runout Check

1. | Place a dial gauge about 5mm (0.2 in.) from the outer circumference of the brake disc, and measure the runout of the disc.

Brake disc runout
Limit: 0.03 mm (0.00118 in.) or less (new one)

2. | If the runout of the brake disc exceeds the limit specification, replace the disc, and then measure the runout again.

3. | If the runout exceeds the limit specification, install the brake disc after turning it 180° and then check the runout of the brake disc again.

4. | If the runout cannot be corrected by changing the position of the brake disc, replace the brake disc.

Installation

1. | Installation is the reverse of removal.

2. | Use a SST (09581-11000) when installing the brake caliper assembly.

3. | After installation, bleed the brake system. (Refer to Brake system bleeding)

• | Do not hit piston end by hammer or prying directly against piston face with screwdriver to push in piston.

• | Using wood or used pad to protect piston end and pushing the wood or pad is recommended.

• | When spreading a piston, SST should be cover all area of piston end face.