Technical Service Bulletin SF631 — 2022 FREIGHTLINER 122SD
ENGINE AND ENGINE COOLING
Bulletin Details
| TSB ID | SF631 |
| Manufacturer | |
| Vehicle | 2022 FREIGHTLINER 122SD |
| Component | ENGINE AND ENGINE COOLING |
| Communication Date |
Bulletin Summary
Field Service Campaign for Detroit Diesel Engine Fan Activation with A/C. On certain Freightliner and Western Star vehicles with Detroit Diesel engines, the engine fan fails to activate when the A/C pressure switch circuit is opened, resulting in poor A/C cooling performance at idle.
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.
Other TSBs for the 2022 FREIGHTLINER 122SD
CXA 1_16_CARB Truck Chec
ENGINE
FICM Priming
ENGINE
CXA 7_24_NOx
ENGINE
SF668
EQUIPMENT
SF668
ELECTRICAL SYSTEM
AXLEOILSHORTAGE
POWER TRAIN
MYCOM_031621-1
UNKNOWN OR OTHER
FAB282
EQUIPMENT
FAB161
SUSPENSION