Commercial vehicle drivers must verify foundation air brake assemblies against strict safety thresholds during a vehicle walkaround inspection. Match each brake system component on the left with its corresponding inspection checkpoint and safety standard on the right.
- Brake shoe friction liningMust have at least 1/4 inch of material thickness remaining and be completely free of grease, oil, or fluid contamination.
- Manual slack adjuster pushrodMust exhibit no more than 1 inch of free play travel when pulled firmly by hand with the parking brakes released.
- Brake drum friction surfaceMust be free of cracks that extend across more than half the width of the friction area or penetrate completely through the casting.
- Flexible air supply hoseMust be securely routed without audible air leaks or chafing wear that exposes the internal reinforcing fabric braid.
Cevap
Brake shoe friction lining pairs with maintaining at least 1/4 inch thickness free of oil and grease; manual slack adjuster pushrod pairs with not exceeding 1 inch of movement when pulled by hand with parking brakes released; brake drum friction surface pairs with having no cracks extending more than halfway across the friction width or through the casting; and flexible air supply hose pairs with having no audible leaks or chafing that exposes the inner fabric braid.
Each foundation air brake component has distinct inspection criteria: friction linings must maintain at least 1/4 inch thickness without lubricant contamination; manual slack adjusters must allow no more than 1 inch of pushrod travel when pulled by hand with brakes released; brake drums must not have through-cracks or fractures exceeding half the friction surface width; and flexible air hoses must be free of audible leaks and chafing that exposes reinforcing fabric.
Adım Adım Çözüm
Anahtar Kavram
Foundation Air Brake Component Inspection Standards and Defect Tolerances
Tahmini Süre:1m 0s