韩国现代资料NVH_2_图文(精)

Disc run-out can cause brake judder.

2 Drum brake

If fluctuations (sticking and slipping vibration of the brake drum and brake shoe of the frictional force occur between the brake drum and brake shoe. This vibration is transmitted to the rear suspension, and this causes vibration of the vehicle body and then the brake pedal. This vibration is governed by the degree to which discs are parallel, the disc run-out, and the roundness of the brake drum and the contact distribution of its shoe.

3 Inspection – Caliper

1. Check the caliper body cylinder inner surface for wear, damage and/or corrosion.

2. Check the piston for wear, damage and/or corrosion.

3. Check the caliper body and sleeve for wear.

4. Check pads for deformation, metal backing for damage and for oil on the pads.

5. Check the wear indicator for damage.

6. Inspect the brake disc using a dial gauge and micrometer.

7. If necessary, replace the brake disc.

4 Front brake disc thickness check

1. Using a micrometer, measure disc thickness at eight positions, approximately 45° apart and 10 mm in from the outer edge of the disc.

2. If the disc is beyond the limits for thickness, remove it and install a new one. If thickness variation exceeds the specification, replace the brake disc

or turn rotor with on the car type brake lathe. Be sure to

follow the exact brake lathe manufacture instruction.

※ Brake thickness

ut check

n raise the

caliper assembly upward and secure by using wire.2.

roove, cracks, and rust.

3. Plac the .

◈ when th w t y be sto ency range of clutch judder is 10 ~ 20Ju lutch partial engagement is keeping when climbing uphill or when the vehicle is over loaded condition.The vibrating force is related with ;

1. The friction characteristics of facing material and run-out of the clutch disc.

1n the clutch housing using the

leakage in engine rear bearing oil seal and

part is

tact, the pressure

- Standard value: 26.0 mm (1.024 in.

- Limit: 24.4 mm (0.96 in.

- Thickness variation (at least 8 positions: The

difference between any thickness measurements

should not be more than 0.005 mm (0.0002 in.

5 Front brake disc run-o 1. Remove the caliper support bolts, the Inspect the disc surface for g Clean the disc thoroughly and remove all rust.

e a dial gauge approximately 5 mm (0.2 in. from

outer circumstance of the brake disc, and

measure the run-out of the disc ※ Limit: 0.03 mm (0.0012 in.

Clutch Judder The clutch judder is produced e clutch facing meets the fly wheel ith abnormal contact or partially engaged especially s pped when the clutch is engaged completely. The frequ Hz approximately.

arting the vehicle. Judder ma dder is occurred more easily if c 2. Different height or not on the line of diaphragm spring fingers.

3. Incorrect installation of clutch release cable

Inspection - Clutch cover and disc

1. Clean the dust o vacuum brush or dry floor cloth and ought not to

use the compressed air absolutely. Check the oil

transaxle front oil seal. If it is leaked, replace them.

2. The friction surface of pressure plate must be equalized to entire disc surface. If any

excessive wear at the point of con plate is installed incorrectly.