Mack truck: it has been determined that the 90 degree single check valve fitting manufactured by parker...
Mack technical service bulletin SC-334 for 2007 Mack Gu, 2007 Mack Cxu and 2004-2005, 2007 Mack CV and others.
- Bulletin number
- SC-334
- Component
- Service brakes, air: supply: check valve
- Summary
- Mack truck: it has been determined that the 90 degree single check valve fitting manufactured by parker hannifin corp. Which is used in the supply port of the spring brake modulating relay valve (bendix sr 7 valve) may have a defect whereby the valve body retainer may become excessively worn and eventually break apart. Models cxu, cxp, cxn, chu, chn, gu, ctp, ct, cv, mru, and leu. 1/1/04-11/3/05 and 5/2/07-7/26/07.
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