Service bulletin 20TS-03REV
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10176789 |
| Published by NHTSA | 2020-06-26 |
| Manufacturer's number | 20TS-03REV |
| Manufacturer's date | 2020-06-25 |
| NHTSA component | ENGINE AND ENGINE COOLING |
NHTSA's summary
Revised Technical Service Letter for DD Heavy Duty Platform Belt Tensioner Change. A newly designed, dual-arm friction shoe damping tensioner was implemented for the DD Heavy Duty Platform.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Engine
| FREIGHTLINER 114SD | 2018, 2019, 2020, 2021 |
|---|---|
| FREIGHTLINER 122SD | 2018 to 2021 |
| FREIGHTLINER BUSINESS CLASS M2 | 2018 to 2021 |
| FREIGHTLINER CASCADIA | 2018, 2019, 2020, 2021 |
| WESTERN STAR 4700 | 2018, 2019, 2020, 2021 |
| WESTERN STAR 4800 | 2018, 2019, 2020, 2021 |
| WESTERN STAR 4900 | 2018, 2019, 2020, 2021 |
| WESTERN STAR 5700 | 2018, 2019, 2020, 2021 |
| WESTERN STAR 6900 | 2018, 2019, 2020, 2021 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 21V073000 | 2021-02-12. ENGINE |
|---|---|
| 2020408 | 2020-09-01. Engine |
| 20V527000 | 2020-09-01. ELECTRICAL SYSTEM:WIRING; ENGINE AND ENGINE COOLING |
| 18V581000 | 2018-08-30. ENGINE AND ENGINE COOLING:ENGINE:DIESEL |
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| CXA 03_26_Surge Tank | 2026-04-02. Other. CX Advocate for discolored coolant surge tanks (24CSA-20) |
|---|---|
| FleetCom_Heater Core | 2026-01-08. Other. Fleet Communications for Heater Core Plugging |
| FleetCom_SS 3163-FTL | 2025-12-06. Other. Fleet Communications for Power Steering Reservoir Fill Cap Venting |
| FleetCom_Low Coolant | 2025-12-05. Other. Fleet Communications for Low Coolant Sensor |
| CXA_10_25_Low Coolant | 2025-11-05. Other. CX Advocate for P4, WST X-Series, DD Engines Low/Critical Low Coolant Warnings |
| CXA_10_25_Conmet Oil Pan | 2025-11-05. Other. CX Advocate for ConMet Oil Pan Insert Additional Issues |
| CXA_9_25_Tech Questions | 2025-10-03. Other. CX Advocate for technical questions/issues raised |
| CXA_8_25_Tech Questions | 2025-09-02. Other. CX Advocate for technical questions/issues raised |
| 24CSA-19Rev | 2025-09-02. Other. Revised Customer Service Annoucement for No Trouble Found Heavy Duty Engine Product (HDEP) Oil Separator Leaks |
| CXA 3_25_NOx | 2025-04-02. Other. CX Advocate for NOx conversion low faults |