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Service bulletin CSB-08-350-004

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 id10027647
Published by NHTSA2009-01-28
Manufacturer's numberCSB-08-350-004
Manufacturer's date2008-09-01
NHTSA componentSUSPENSION:REAR

NHTSA's summary

SPARTAN CHASSIS: REAR SUSPENSION TAG AXLE. DOUBLE CHECK VALVE BETWEEN DRIVE AXLE SUSPENSION AND TAG AXLE SUSPENSION IS INTERFERING WITH AUTOMATIC LOAD SHARING BETWEEN DRIVE AND TAG AXLES. EQUIPPED WITH HENDRICKSON HTB 210 SUSPENSION AND HADLEY SLS (SELF LEVELING SYSTEM). *PE

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
SPARTAN K22006 to 2008

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