1976 MACK U Recalls (3)

Campaign:
78V068000 on 10/11/1979
Component:
Service brakes, air:antilock:control unit/module
Manufactured:
09/30/1974 - 02/29/1976
Affected:
9,700
Defect:
An axle "no brake" condition could result from an eaton controller internal electrical malfunction. this condition may cause the anti-wheel lock valve solenoid to be continuously energized and prevent the brakes from being applied on one of the axles. as a result, the anti-wheel lock warning lamp is not activated.
Correction:
The dealer will inspect and, if necessary, replace the anti-wheel lock controller without charge to owner.
Notes:
Vehicle description: trucks equipped with eaton 21 anti-lock controllers.system: service brakes; anti-wheel lock solenoid.consequences of defect: loss of brakes on any one axle will result in extendedvehicle stopping distances, which could lead to a vehicle accident.

Campaign:
78V031000 on 10/11/1979
Component:
Suspension:multiple axle
Manufactured:
02/28/1975 - 01/31/1978
Affected:
33,000
Defect:
The tee bracket, which is mounted on the front axle of the bogie, may fail due to vibration brought on by road surface irregularities. bracket failure would leave the tee bracket unsupported and cause broken hose connector fittings. this would result in automatic application of the spring emergency brakes.
Correction:
The dealer will replace the defective bracket with a redesigned version.
Notes:
Vehicle description: trucks equipped with highway bogies.system: suspension; tee bracket.consequences of defect: automatic application of the spring emergency brakescould cause loss of vehicle control and an accident.

Campaign:
77V173000 on 10/11/1979
Component:
Engine and engine cooling:cooling system:fan
Affected:
48,000
Defect:
The flex blade fans on the involved vehicles may develop cracks in the laminated stiffener as a result of fatigue during operation. if such a condition exists and the cracks go undetected, continued operation could cause pieces of the stiffener to break off.
Correction:
Dealer will replace the original fan with a steel fixed blade fan, free of charge.
Notes:
Vehicle description: trucks equipped with six-cylinder engines.system: engine cooling; fan.consequences of defect: broken pieces can be propelled outside of the fanshroud and will present an immediate danger and possible injury to personsstanding nearby.note: prior to correction, vehicle should not be serviced with the hood raisedand the engine running.

Home | Privacy