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Service bulletin PI 0844

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 id10083264
Published by NHTSA2016-10-21
Manufacturer's numberPI 0844
Manufacturer's date2014-04-30
NHTSA componentSERVICE BRAKES

NHTSA's summary

SOME MACK LEU TRUCKS WERE BUILT BETWEEN 08/15/2012–11/05/2012, WITH AN INVERSION VALVE INSTALLED INSTEAD OF A PRESSURE REDUCING VALVE FOR THE WORK BRAKE SYSTEM. THE EXISTING INVERSION VALVE (PART NUMBER 21007503) MAY CAUSE MAXIMUM BRAKE SYSTEM PRESSURE WHILE APPLYING THE TRUCK’S WORK BRAKE.

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

Brakes

Vehicles listed
MACK LEU2013

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