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Service campaign SC S4920 202604

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 campaign
NHTSA id11032096
Published by NHTSA2026-05-05
Manufacturer's numberSC S4920 202604
Manufacturer's date2026-04-02
NHTSA componentSUSPENSION

NHTSA's summary

SC - Trunion Nut Pinch Bolt.

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

Suspension

Vehicles listed
MACK LR2024, 2025, 2026
MACK TERRAPRO (TE)2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it)

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

Other bulletins for the same vehicles and component
CBR-2016 2024122025-01-02. Service bulletin. Frame lean can be caused by several seemingly isolated possibilities. The two most common are suspension and frame assembly issues.
S3857 2024022024-03-06. Service bulletin. Service Campaign - MMD Suspension Bracket Torque.
CBR-2014 2024022024-03-05. Service bulletin. CBR - Driveline Noise, Suspension Ride Height Too High, Suspension Will Not Exhaust - Chassis Built 2016w01 And Newer.
CBR-2016 2024012024-02-02. Service bulletin. CBR: Frame Or Cab Lean
KC-22922023-07-06. Service bulletin. Vehicles Equipped With Chalmers Suspension - Frame Bracket Hardware Loose or Interfering
KC-2273-Rev62023-06-05. Service bulletin. CBR: Pre-Delivery Inspection (PDI) Torque Values. This is to help with the torque specs needed to complete a Pre- Delivery Inspection (PDI).