Chrysler 1997 Stratus Convertible RHD Service Manual page 123

BRAKING DISC GRINDER
JX
SERVICE PROCEDURES (Continued)
Fig. 36 Resurfacing Brake Rotor (Final Finish)
The following chart shows the location of measure-
ments and specifications when servicing the rotor.
NOTE: All rotors have markings for minimum
allowable thickness cast on an un-machined sur-
face of the rotor (Fig. 37).
This marking includes 0.76 mm (0.030 inch) allow-
able rotor wear beyond the recommended 0.76 mm
(0.030 inch) of rotor refacing.
The collets, shafts and adapters used on the brake
lathe and the bearing cups in the rotor MUST be
clean and free from any chips or contamination.
When mounting the rotor on the brake lathe, strict
attention to the brake lathe manufacturer's operating
instructions is required.
If the rotor is not mounted properly, the lateral
runout will be worse after refacing or resurfacing
than before.
REFACING BRAKE ROTOR
Refacing of the rotor is not required each time the
brake pads are replaced.
When refacing a rotor the required 0.10 mm (0.004
inch) TIR (Total Indicator Reading) and 0.013 mm
Braking Rotor
All Front Disc Brakes
* TIR Total Indicator Reading (Measured On Vehicle)
BRAKE ROTOR REFINISHING LIMITS
Rotor
Thickness
23.13-22.87 mm 21.4 mm
.911 -.900 in. .843 in
MINIMUM THICKNESS MARKINGS
Fig. 37 Minimum Brake Rotor Thickness Markings
(0.0005 inch) thickness variation limits MUST BE
MAINTAINED. Extreme care in the operation of
rotor turning equipment is required.
The use of a double straddle cutter (Fig. 35) that
machines both sides of the rotor at the same time is
highly recommended.
RESURFACNG BRAKE ROTOR
This operation can be used when rotor surface is
rusty, has lining deposits or excessive lateral runout
or thickness variation is evident.
A sanding rotor attachment will remove surface
contamination without removing much rotor mate-
rial.
It will generally follow variations in thickness that
are in the rotor.
BRAKE DRUM MACHINING
Measure drum runout and diameter. If not to spec-
ification, reface drum. (Runout should not exceed
0.1524 mm or 0.006 inch). The diameter variation
(oval shape) of the drum braking surface must not
Minimum Rotor
Rotor Thicness
Thickness Variation
0.013 mm
0.0005 in.
BRAKES
(Example)
Rotor Rotor Micro
Run Out * Finish
0.13 mm 15-80 RMS
0.005 in.
5 - 21