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Service bulletin MAPI486

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 id42034
Published by NHTSA1995-11-01
Manufacturer's numberMAPI486
Manufacturer's date1995-04-01
NHTSA componentSERVICE BRAKES, AIR

NHTSA's summary

CERTAIN MACK CHASSIS EQUIPPED WITH PRUGE TYPE AIR DRYERS AND HOLSET AIR COMPRESSORS COULD POSSIBLY HAVE BEEN PLUMBED INCORRECTLY AT THE FACTORY. TO CORRECT THIS CONDITION, DEALERS ARE TO INSPECT THE AFFECTED CHASSIS AND CORRECTED AS OUTLINED IN THE INSTRUCTIONS. *TW

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 MACK

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