Reported Dec 2, 19801,992 vehicles affectedMACK TRUCKS, INCORPORATEDBuilt Jul 1, 1979 – Nov 1, 1980
The defect
Chafing may occur between the throttle return springs and their mounting brackets and can cause the hook end of the spring to wear prematurely and eventually break.
The remedy
Dealer will install a set of redesigned throttle return springs and mounting brackets for improved service life at no charge to owner.
Vehicle description: trucks.system: fuel; throttle return springs and mounting brackets.consequences of defect: in the event of such a failure, the engine will go intohalf throttle position. This could cause the vehicle to become uncontrollable,possibly resulting in a vehicle accident.