Twin y suspension, trailing blade, replacement
Mack technical service bulletin FSB 722-004 for 2014-2016 Mack Cxu and 2014-2016 Mack Chu.
- Bulletin number
- FSB 722-004
- Component
- Suspension
- Summary
- Twin y suspension, trailing blade, replacement. Some mack chu and cxu trucks built 06/13/2013 through 09/25/2015 and equipped with twin-y suspension may require replacement of the twin-y trailing blades with a more robust design. The new twin-y trailing blades have a new profile with a stronger material thickness of 7.0 mm (0.28 in). All four trailing blades will require replacement in this repair procedure.
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