What should you inspect the PCMS O-ring for?

• A. Damage
• B. Color change
• C. Dirt accumulation
• D. Cracks

Answer: (A)

The important thing to check is whether the O-ring has any physical damage that would prevent a proper seal. The seal’s integrity relies on the rubber remaining intact, so look for nicks, cuts, gouges, abrasions, deformation, or any cracking. These are signs the O-ring is compromised and could leak or fail under pressure. Color change can happen with aging or exposure but doesn’t reliably indicate a failing seal on its own, and dirt can be cleaned off without addressing the underlying integrity. If you see any damage or deformation, the O-ring should be replaced to maintain the system’s seal.