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Service bulletin 980605-P1506

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 id601384
Published by NHTSA1998-08-03
Manufacturer's number980605-P1506
Manufacturer's date1998-06-05
Replaces980504-P1506
NHTSA componentSUSPENSION

NHTSA's summary

SUBJECT ON AL SUSPENSIN HEIGHT CONTROL VALVE LINKAGE ROD UPGRADE, AND HEIGHT CONTROL VALVE TRAVEL OVER CENTER CONDITION. *YC

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 CH
MACK CL

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