Vehicle category: medium trucks and school buses equipped with 8.2 liter dieselengines.system: engine and engine cooling; governor linkage regulator.consequences of defect: if the lock loosens, the engine will continue to rundespite attempts to turn it off normally. If the lock breaks, other componentscould be damaged, possibly causing loss of throttle control, without priorwarning, and an accident.note: in the event a loss of throttle control occurs before the vehicle ismodified, shift into neutral and apply brakes until vehicle comes to a completestop.