NHTSA recall 89V224000
Service brakes, hydraulic › Power assist › Hydraulic › Hoses, lines/piping, and fittings
International 1452SC and 6 more
Reported Dec 11, 198910,459 vehicles affectedNAVISTAR INTL CORP.Built Apr 1, 1989 – Nov 1, 1989
The defect
The throttle valve inside the hydraulic brake booster may deform from buildup of heat and pressure and close-off fluid return ports.
The risk
This could cause excessive pressure buildup in thebooster causing the brakes to self apply with a severe unexpected stop. Thiscondition could also result in loss of power steering assist. Either conditioncould result in an accident.
The remedy
Replace brake booster assembly.