Supply: check valveRecall 75V-141 · Mack vehicles
MACK TRUCKS, INCORPORATED recall 75V-141 covers 935 Mack vehicles for a supply: check valve problem, reported to NHTSA on July 24, 1975.
Source: NHTSA recall 75V141000 and manufacturer quarterly reports. Started by the manufacturer.
The problem
The fix
The remedy has not been described yet.
MACK CAMPAIGN NO SCO-63.TRUCKS MFG'D DEC.12, 1974 THRU JUNE 30, 1975.POSSIBILITY THAT THE TRAILER SUPPLY CONTROL VALVE EXHAUST PORT WAS INADVERTENLYPLUGGED, AND THE SAFETY VALVE ON THE AIR RESERVOIR MAY HAVE BEEN OMITTED.IFTHIS CONDITION EXISTS IT COULD LEAD TO INTERMITTENT LOCKUP OF THE TRAILERBRAKES AND DIFFICULTY IN CHARGING THE TRAILER BRAKE AIR SYSTEM.(CORRECT BYINSPECTING AND INSTALLING VALVE AND UNPLUG CONTROL VALVE).
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.