Technical Service Bulletin TSB-042121 — 2021 ROSENBAUER AERIAL
ENGINE AND ENGINE COOLING
Bulletin Details
| TSB ID | TSB-042121 |
| Manufacturer | |
| Vehicle | 2021 ROSENBAUER AERIAL |
| Component | ENGINE AND ENGINE COOLING |
| Communication Date |
Bulletin Summary
The VMUX input pin may fail due to a flyback voltage spike from an unsuppressed solenoid coil installed on a hydraulic manifold for the aerial. The solenoid coil will need to be swapped out for a suppressed version to prevent this from happening.
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.