Brake Pedal - Pulsation, Light Application
Group: CHASSISNumber: 95-50-004
Date: SEPTEMBER, 1995
Model: ELANTRA (ALL)
Subject:
BRAKE PEDAL PULSATION
DIAGNOSIS AND REPAIR
THIS TSB SUPERSEDES TSB 94-50-004-1
"BRAKE PEDAL PULSATION DIAGNOSIS AND REPAIR"
Some Elantra vehicles may experience brake pedal pulsation during light brake application at speeds over 30 mph, caused by excessive disc thickness variation.
Brake pedal pulsation does not affect the stopping distance of the vehicle however, it may be annoying to the driver.
If a road test has confirmed that brake pedal pulsation does occur, the front brake discs and pads should be replaced using the following procedure:
1. Raise the vehicle
2. Remove the wheel lug nuts. Before removing the wheel, mark the wheel and one of the wheel studs so the wheel can be reinstalled in its original position.
3. Remove the drive shaft nut ,cotter pin, and washer.
4. Remove the caliper cylinder and secure it with wire or some other retaining method so it will not interfere with removal of the disc.
5. Remove and discard the brake pads.
6. Remove the caliper carrier from the knuckle assembly.
7. Using special tool, 09526-11001, (Axle Shaft Puller), disconnect the drive shaft from the hub, and remove the brake disc and hub assembly.
8. Separate the disc from the hub and discard it.
9. Install a new disc on the hub.
10. Install the brake disc and hub assembly to the axle shaft.
11. Install the axle washer and nut. Then tighten and torque the axle nut to 148-192 lb.ft. and install the cotter pin
12. Measure the total run out at the outer edge of the disc face. If the total run out exceeds 0.10 mm (0.004 in.), the hub and knuckle assembly should be checked for proper assembly by following the procedures specified in the Shop Manual.
13. Attach the caliper carrier to the knuckle assembly.
14. Install new brake clips, pads and shims.
15. Install the caliper cylinder assembly.
16. Torque all bolts and nuts to specifications as shown in the Shop Manual
17. Install the wheel in the original position and torque lug nuts to 65-80 lb.ft.
18. Road test vehicle.
WARRANTY INFORMATION