Disk Brake Rotor Check

CAUTION: Disk brakes must be kept within the allowable service values in order to maintain normal brake operation.

Before turning the brake disk, the following conditions should be checked.

INSPECTION CHART

Inspection items	Remarks
Scratches, rust, saturated lining materials and wear	If the vehicle is not driven for a long period of time, sections of the disks that are not in contact with the pads will become rusty, causing noise and shuddering. If grooves and scratches resulting from excessive disk wear are not removed prior to installing a new pad assembly, there will be inadequate contact between the disk and the lining (pad) until the pads conform to the disk.
Run-out	Excessive run-out of the disks will increase the pedal depression resistance due to piston kick-back.
Change in thickness (parallelism)	If the thickness of the disk changes, this will cause pedal pulsation, shuddering and surging.
Inset or warping (flatness)	Overheating and improper handling while servicing will cause warping or distortion.