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July 13, 2022 Service bulletin

Transit bus repair instructions for auxiliary heat system

Proterra technical service bulletin SC-21-177 for 2019-2020 Proterra Catalyst and 2019-2020 Proterra ZX5.

Bulletin number
SC-21-177 (SC-21-177)
Component
Unknown or other
Summary
Transit bus repair instructions for auxiliary heat system. Replacement coolant lines that pass under the streetside wheelwell box.

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