Recall
Thomas School Bus — 92V078000
NHTSA ID
92V078000
Make
Thomas
Model
School Bus
Years Affected
1992
Recall Date
1992-05-19
Component
SERVICE BRAKES, AIR:SUPPLY:HOSES, LINES/PIPING, AND FITTINGS
Units Affected
24
Completion Rate
—
Mfr Campaign No.
Summary
A BRAKE AIR LINE PLUMBING ERROR CAUSES THE SPRING BRAKES TO BE APPLIED WITHOUT BRAKE APPLICATION WHEN THE AIR PRESSURE IN THE PRIMARY TANK DROPS TO A LEVEL WHICH AUTOMATICALLY ACTIVATES THE SPRING BRAKE SYSTEM.
Consequence
ACTIVATION OF THE SPRING BRAKE SYSTEM WITHOUT OPERATORBRAKE APPLICATION WILL CAUSE THE SPRING BRAKE TO BE APPLIED, LOCKING THE BRAKESWITHOUT ANY WARNING TO THE OPERATOR.
Remedy
REPLACE AND REROUTE AIR BRAKE HOSE TO COMPLY WITH FMVSS 121.