Technical Service Bulletin SC-23-128 — 2022 PROTERRA ZX5
ENGINE
Bulletin Details
| TSB ID | SC-23-128 |
| Manufacturer | |
| Vehicle | 2022 PROTERRA ZX5 |
| Component | ENGINE |
| Communication Date |
Bulletin Summary
The procedure describes the process of rerouting the rooftop coolant lines so the expansion tank is downstream of the HVAC chiller and lowers the pressure drop between expansion tank and pump inlet.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.