Proterra Catalyst: Service brakes — check valve

Affects Proterra Catalyst · 2017–2018 — about 147 vehicles.

The hazard

If the swivel valves are unable to protect the air brake system against loss of air pressure, this may lead to service brake failure and the possibility for the uncontrolled application of the safety brake. Either condition increases the risk of crash.

What to do

Proterra will notify owners, and will replace the swivel valve with a check valve that is sufficient to protect the air brake system, free of charge. The recall began July 26, 2019. Owners may contact Proterra customer service at 1-864-438-0000.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational