Mack: fittings for current air compressor coolant hoses are not the same size at each end and...
Mack technical service bulletin FSB-561-023 for 2009-2011 Mack Gu and 2012-2013 Mack Granite (Gu).
- Bulletin number
- FSB-561-023
- Component
- Engine and engine cooling: cooling system: hoses/lines/piping/fittings
- Summary
- Mack: fittings for current air compressor coolant hoses are not the same size at each end and incompatibility of hose inside diameter and compressor fitting size caused compressor hoses to come loose or blow out air compressor fittings. Model 2009-2013 gu7, gu8, mp8.
Owners of these vehicles have filed 2 complaints in the engine category.
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