Grand Cherokee 4WD V8-4.7L (2003)
Brake Rotor/Disc: Service and Repair
Brake Rotor Machining
STANDARD PROCEDURE - DISC BRAKE ROTOR MACHINING
CAUTION: For vehicles equipped with the Quadra Drive System, consisting of the NV-247 transfer case and a Vari-Lok differential in the front and
rear axles, the following steps must be done prior to the use of a hub mounted on-vehicle brake lathe. Disconnect the driveshaft from the respective
axle on which the brake rotors are being machined. Temporarily remove both brake calipers from the axle while disc rotor machining is in process.
Both steps will prevent unnecessary loads to the hub mounted on-vehicle lathe and speed machining times. Install a thread lock material to the
driveshaft attaching bolts when reinstalling.
NOTE: A hub mounted on-vehicle lathe is recommended. This type of lathe trues the rotor to the vehicles hub/bearing.
The disc brake rotor can be machined if scored or worn. The lathe must machine both sides of the rotor simultaneously with dual cutter heads. The
rotor mounting surface must be clean before placing on the lathe. Equipment capable of machining only one side at a time may produce a tapered
rotor.
CAUTION: Brake rotors that do not meet minimum thickness specifications before or after machining must be replaced.
