(a) Using a drum gauge or equivalent, measure the inside diameter of the disc.

Standard inside diameter:

240 mm (9.45 in.)

Maximum inside diameter:

241 mm (9.49 in.)

If the inside diameter of the disc is greater than the maximum, replace the disc.

(a) Using a ruler, measure the thickness of the shoe lining.

Standard thickness:

3.8 mm (0.148 in.)

Minimum thickness:

1.0 mm (0.0394 in.)

If the lining thickness is equal to or less than the minimum, or if severe or uneven wear is present, replace the shoe.

(a) Apply chalk to the inside surface of the disc. Then grind the brake shoe lining on the disc until full contact is achieved.

If the drum and brake shoe lining do not have full contact, use a brake shoe grinder or replace the brake shoe.