Sonata V6-3.0L (1991)
Brake Rotor/Disc: All Technical Service Bulletins
Brake Rotor - Servicing Procedures
Group: CHASSIS
Number: 94-50-003
Date: MAY, 1994
Model: ALL
Subject:
BRAKE ROTOR SERVICING
PURPOSE:
This Technical Service Bulletin describes brake rotor servicing procedures when an on-the-car brake lathe is used to correct variations in brake rotor
thickness and run-out conditions. Warranty labor operation time allowances are provided.
AFFECTED VEHICLES:
All with front or rear disc brakes
DESCRIPTION:
For optimum braking performance, all brake rotors must be carefully serviced to meet recommended thickness and run-out tolerances. It is important to
check rotor run-out and thickness prior to servicing the rotors.
When turning rotors to correct uneven thickness or excessive run-out, the best results will be obtained by using an on-the-car brake lathe such as,
Pro-Cut, Model VBG-610. Regardless of the brand or type of brake lathe used, follow the lathe manufacturer's instructions for properly servicing the
rotors.
BRAKE ROTOR SERVICING PROCEDURES:
The following procedures apply to all vehicles with front or rear disc brakes. Refer to Group 58 of the specific vehicles shop manual for correct brake
rotor thickness and run-out tolerances.
BRAKE ROTOR RUN-OUT
1.
Remove the brake caliper support bolts and raise the caliper upward, away from the rotor. Secure the caliper out of the way with a wire hook.
2.
Inspect the brake rotor surface for grooves, cracks, and rust. Clean the rotor of all debris before proceeding.
3.
Position a dial gauge approximately 5 mm (0.2 in.) from the outer edge of the rotor, zero the gauge and measure the run-out. Refer to the
appropriate service manual for allowable run-out specifications.
