9.14
BRAKES
FRONT BRAKE DISC
Disc Runout
1. Mount dial indicator as shown to measure disc runout.
Slowly rotate the disc and read total runout on the dial
indicator. Replace the disc if runout exceeds specification.
Disc Inspection
1. Visually inspect disc for scoring, scratches, or gouges.
Replace the disc if any deep scratches are evident.
2. Use a 0-1” micrometer and measure the disc thickness at
eight different points around the pad contact surface.
Replace disc if worn beyond service limit.
Disc Replacement
1. Remove the front brake caliper (see “FRONT CALIPER
SERVICE”).
2. Remove wheel hub cotter pin, castle nut and washers.
3. Remove the wheel hub assembly from the vehicle and
remove the (4) bolts retaining the disc to the hub.
4. Clean the wheel hub mating surface and install new disc on
wheel hub.
5. Install new bolts and torque to 18 ft. lbs. (24 Nm).
Brake Disc Runout
Service Limit .010” (.254 mm)
Measure
Thickness
Front
Disc
Brake Disc Thickness
New .188” (4.78 mm)
Service Limit .170” (4.32 mm)
Brake Disc Thickness Variance
Service Limit: .002” (.051 mm)
difference between measurements
Cotter
Pin
Washers
Nut
(4) Bolts
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