During a pre-trip walkaround inspection of a commercial vehicle's air brake system, a driver must verify specific mechanical tolerances and physical condition requirements for each foundation component. Match each brake component on the left with its corresponding critical inspection criterion or defect threshold on the right.
- Brake Drums or RotorsMust not have cracks that extend across more than half the width of the friction area or show contamination from oil or grease.
- Friction Linings or Brake ShoesMust not be worn thinner than 1/4 inch at the center or contaminated with lubricants from leaking wheel seals.
- Manual Slack AdjustersMust have no more than 1 inch of pushrod travel when pulled firmly by hand with the spring brakes released and wheels chocked.
- Brake Chambers and Mounting HardwareMust be securely fastened with no loose or missing bolts, cracked clamp rings, or audible air leaks when pressurized.
Cevap
Brake Drums or Rotors match with having no cracks extending more than half the friction area width; Friction Linings match with minimum 1/4 inch thickness and no grease contamination; Manual Slack Adjusters match with a maximum 1 inch pushrod travel when pulled by hand with spring brakes released; and Brake Chambers match with secure mounting, intact clamp rings, and no audible leaks.
Each foundation brake component has specific inspection checkpoints: drums and rotors are checked for cracks extending more than half the friction face width; linings are checked for at least 1/4 inch thickness and absence of grease/oil; manual slack adjusters are checked for a maximum of 1 inch pushrod free play; and brake chambers are inspected for secure mounting bolts, undamaged clamps, and pneumatic sealing.
Adım Adım Çözüm
Anahtar Kavram
Foundation brake component inspection standards and critical defect thresholds
Tahmini Süre:1m 15s