Match each commercial vehicle brake system component with its corresponding visual inspection checkpoint and out-of-service defect criteria.
- Manual slack adjusterPushrod free play must not exceed 1 inch when pulled firmly by hand with wheels chocked and parking brakes released.
- Brake drum or rotorMust be free of through-cracks extending more than half the friction area width and free of grease or oil contamination.
- Brake friction lining or padMust not be worn thinner than 1/4 inch at the center of the shoe and must remain completely clean of oil or lubricant.
- Flexible brake air hoseMust be securely mounted without audible air leaks, crimping, deep chafing, or exposed internal reinforcement fabric.
Cevap
Manual slack adjuster pairs with the 1-inch pushrod travel limit; Brake drum or rotor pairs with the half-width crack and contamination rule; Brake friction lining pairs with the 1/4-inch minimum thickness threshold; Flexible brake air hose pairs with the absence of audible leaks, chafing, and exposed ply.
Each foundation brake component corresponds to a distinct physical measurement and safety checkpoint: manual slack adjusters allow a maximum of 1 inch of manual pushrod travel; drums/rotors must be free of through-cracks extending more than half the friction face; drum linings require at least 1/4 inch of remaining friction material; and flexible air lines must maintain airtight integrity with zero structural chafing.
Adım Adım Çözüm
Anahtar Kavram
Foundation brake component inspection standards and defect criteria
Tahmini Süre:1m 15s