CHAPTER5 BRAKES LH50DU SERVICE MANUAL19.1
CHAPTER 5 BRAKES PAGE. 5-
5.10 FRONT DISC INSPECTION / REMOVAL / REPLACEMENT
INSPECTION
1. Visually inspect the brake disc for nicks,
scratches, or damage.
2. Measure the disc thickness at 8 different points
around the pad contact surface using a 0-1"
micrometer and a dial indicator. Replace disc if
worn beyond service limit.
Brake Disc Thickness
New 0.150-0.164" (3.810 - 4.166 mm)
Service Limit 0.140" / 3.556 mm
Brake Disc Thickness Variance
Service Limit 0.002 " (0.051 mm)
difference between measurements
3. Mount dial indicator as shown to measure disc
runout on the dial indicator. Replace the disc if
runout exceeds specifications.
Brake Disc Runout
Service Limit 0.005" (0.127 mm)
REMOVAL/ REPLACEMENT
1. Removal caliper and hub. Apply heat to the hub
in the area of the brake disc mounting bolts to
soften the bolt locking agent.
2. Remove bolts and disc.
3. Clean mating surface of disc and hub.
4. Install new disc on hub and tighten to specified.
CAUTION:
Always use new brake disc mounting bolts.
Front Brake Disc Mounting Bolt Torque :
18 ft. lbs. (25 Nm )
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