Inspect the brake linings every 9656 km (6,000 miles) and any wheel removal, including tire rotation. Replace the brake linings before the rivet heads become exposed and score the brake drum. Replace the brake linings when the thickness of the brake lining is 6.3 mm (0.250 inches) at the thinnest point. Always replace the brake linings as a complete axle set.
The brake linings should be free of grease and oil and show at least a 70 percent contact area over the braking surface, indicating satisfactory brake lining contact.
Caution: Avoid taking the following actions when you service wheel brake parts:
• Do not grind brake linings. • Do not sand brake linings. • Do not clean wheel brake parts with a dry brush or with compressed air.
Remove any shiny glazed spots with an emery cloth while wearing a dust mask. Wipe the brake lining clean with a damp cloth.