Mack · Canada · Crit
Mack CXN, CV +7 more: Brakes
Affects Mack CXN, CV, CHN, CTP, MR, CXP, Cxu, Chu, Gu · 2006–2008 — about 2K vehicles.
The hazard
On certain vehicles, the internal rubber check valve inside the Bendix SR-7 spring brake modulating valve can become deformed over time. The effect of this defect is intermittent and presents a potential delay or failure in applying the parking brakes; potentially resulting in a vehicle roll away. Should this occur, the unattended roll away vehicle could strike a bystander or cause property damage. Correction: Dealers will install a check valve repair kit, and replace the Parker single check valve.
What to do
Contact your dealer; the remedy details were not included in the filing.
Critical — crash/injury risk now
High — injury risk; see remedy
Moderate — fix at next service
Low — minor / informational