Inspect the brake shoes for excessive or uneven wear, fluid contamination, bent and/or broken parts and cracks. If any of these conditions exist, replace the brake shoes.
Measure the lining thickness. Replace the linings if they are below minimum service thickness limits. See the Brake Specifications Chart in this section. Replace the leading and trailing shoes on both sides at the same time. Replacement of the shoes one side or one shoe at a time, will cause uneven braking.