Match each foundation brake assembly component with its correct pre-trip inspection checkpoint and safety tolerance standard.
- Brake Drums or RotorsMust not have cracks that extend across more than half the width of the friction surface or show evidence of grease contamination.
- Brake Linings or Friction PadsMust not be worn dangerously thin (under 1/4 inch for drum shoes) or contaminated with oil, grease, or axle lubricant.
- Manual Slack Adjusters and PushrodsFree play movement should not exceed approximately 1 inch when pulled firmly by hand with the parking brakes released and wheels chocked.
- Brake ChambersMust be firmly bolted to mounting brackets without loose clamp rings, structural dents, or audible air supply leaks.
Cevap
Brake Drums or Rotors match with cracks not exceeding half the friction surface width; Brake Linings match with minimum 1/4 inch thickness and no oil contamination; Manual Slack Adjusters match with maximum 1 inch manual free play travel; Brake Chambers match with secure mounting brackets and no clamp or air leaks.
Each foundation brake component has a distinct safety threshold mandated by commercial vehicle safety standards: drums must not exhibit cracks spanning more than half the friction face; linings must maintain at least 1/4 inch of friction material without grease contamination; manual slack adjuster pushrods must not travel beyond 1 inch during a manual pull check; and brake chambers must be tightly clamped, rigidly mounted, and airtight.
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Anahtar Kavram
Foundation Air Brake Component Defect Criteria and Inspection Tolerances
Tahmini Süre:1m 30s