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Service bulletin PI 0850

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 id10083425
Published by NHTSA2016-10-24
Manufacturer's numberPI 0850
Manufacturer's date2014-05-14
NHTSA componentSUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY:U-BOLT, LEAF SPRING TO AXLE

NHTSA's summary

THE FRONT AXLE U-BOLT WEDGES WERE INSTALLED INCORRECTLY ON SOME MACK CHU TRUCKS BUILT BETWEEN 11/11/2013 AND 02/24/2014. THE INCORRECT INSTALLATION OF THE WEDGE CAUSED THE UBOLTS TO BEND ON THE FRONT AXLE.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Suspension

Vehicles listed
MACK CHU2014 to 2015

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