Pierce · Canada · Crit
Pierce Fire Truck: Brakes
Affects Pierce Fire Truck · 1991–1997 — about 8 vehicles.
The hazard
On certain fire trucks, high speed cycling applications of the two-way Midland check valve by engagement of the Automatic Traction Control (ATC) system can cause the internal piston on the check valve to deteriorate. If this occurs, metal particles might break off the piston and obstruct the rear brake control valve. The obstruction might cause a loss of air pressure to a wheel brake chamber, resulting in a reduction of vehicle braking force, which in turn could lengthen the expected braking distance. Correction: Dealers will replace the two-way 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