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Service bulletin TechTalk566473K

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10191862
Published by NHTSA2021-05-07
Manufacturer's numberTechTalk566473K
Manufacturer's date2021-04-23
NHTSA componentSERVICE BRAKES, HYDRAULIC

NHTSA's summary

Tech Talk discussion on DT12 Countershaft Brake Learn Dynamic Values.

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

Brakes

Vehicles listed
FREIGHTLINER CASCADIA2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20264282026-09-09. Brakes
26V5830002026-09-09. ELECTRONIC STABILITY CONTROL (ESC); SERVICE BRAKES, AIR:ANTILOCK
20230512023-02-10. Brakes
23V0730002023-02-10. ELECTRONIC STABILITY CONTROL (ESC); SERVICE BRAKES, AIR:ANTILOCK:MODULATOR
20226262022-11-01. Brakes
22V8170002022-11-01. SERVICE BRAKES, AIR:ANTILOCK:MODULATOR; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
20204442020-09-18. Brakes
20203052020-07-02. Brakes
20V3900002020-07-02. SERVICE BRAKES, AIR:SUPPLY:QUICK RELEASE VALVE
20200862020-03-03. Brakes

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
CXA 10_25_Air Dryer Purge2025-11-06. Other. CX Advocate for Experiencing Excessive Purging from Air Dryer
MYCOM_09122025-12025-10-03. Other. My Communications for Parts Alert ABS Harness
CALFTL42-0072022-11-02. Service bulletin. Customer Advisory Letter for Brake System Modulator Valve Evaluation.
SF622REV2022-03-03. Service bulletin. Revised Field Service Campaign for Cascadia, 49X ABS MBSP+ Controller Software Update
ICI22-0152022-03-03. Service bulletin. Important Campaign Information letter for SF622 – Addition of 8x4 Vehicles to Populationx
SF6222021-08-28. Service bulletin. Revised Field Service Campaign for Cascadia/49X ABS MBSP+ Controller Software Update. REVISION: The work instructions have been revised. Certain vehicles have a WABCO Anti-Lock Braking System (ABS) controller that logs excessive 629-11 fault codes which subsequently lead to additional downstream fault codes.
ICI21-0272021-08-28. Service bulletin. Important Campaign Information Letter for SF622 – Campaign Revision/Reactivation. This letter is to inform you that the work instructions for Field Service Campaign SF622, Cascadia/49X ABS MBSP+ Controller Software Update have been revised.
SF6222021-06-29. Service bulletin. Field Service Campaign for Cascadia/49X ABS MBSP+ Controller Software Update. Certain vehicles have a WABCO Anti-Lock Braking System (ABS) controller that logs excessive 629-11 fault codes which subsequently lead to additional downstream fault codes.
TechTalk5667712021-06-03. Service bulletin. Tech Talk Discussion P4 New Cascadia ABS Fault Code 520247/31 - Failure Memory Bit (ESC) Condition Exists
CALFTL42-0042021-05-26. Service bulletin. Customer Advisory Letter for Drive Axle Drum Brake S-Cam U-Bolt Replacement.