Acura 3.5 RL Manual page 804

3. Check the brake linings for cracking, glazing, wear,
and contamination.
4. Measure the brake lining thickness.
NOTE: Measurement does not include brake shoe
thickness.
Brake Lining Thickness:
Standard: 1.9 - 2.5 mm (0.075 - 0.098 in)
Service Limit: 1.0 mm (0.04 in)
LININGS
5. If the brake lining thickness is less than the service
limit, replace the brake shoes as a set.
6. Check the bearings in the hub unit for smooth oper-
ation. If the bearings require servicing, refer to
section 18.
7. Measure the inside diameter of the disc/drum using
inside vernier calipers.
Drum Inside Diameter:
Standard: 169.9 - 170.0 mm (6.689 - 6.693 in)
Service Limit: 171.0 mm (6.732 in)
BRAKE DISC/DRUM
8. If the inside diameter of the brake disc/drum is more
than the service limit, replace the brake disc/drum.
9. Check the brake disc/drum for scoring, grooves, and
cracks.
INSIDE VERNIER CALIPERS