NHTSA recall 89V178000
Service brakes, air › Controls › Foot control/valve
Mack CH
Reported Oct 23, 19893,652 vehicles affectedMACK TRUCKS, INCORPORATEDBuilt Nov 1, 1988 – Oct 1, 1989
The defect
Internal components of the E-12 dual circuit air brake valves may be misassembled so that one of the tapered snap rings IS upside down.
The risk
The snap ring can come out causing the valve tomalfunction and apply the truck's brake system without warning; this couldresult in loss of control and a crash.
The remedy
Replace misassembled valves.