Mack Hmm 1976

Model Hmm made in 1976 by Mack got 4 recalls. There were some recalls concerningengine and engine cooling, power train and seat belts.

Model 1976

Recalls


CampaignManufacturerManufacturing dateType# of units affectedDate Owner notified MfgRecall Initiated byManufacturers of recalled vehicles/productsReport Recieved DateRecord Creation DateRegulation Part NumberFMVSS Number
ENGINE AND ENGINE COOLING - COOLING SYSTEM - FAN
77V173000MACK TRUCKS, INCORPORATED V (Vehicle)4800003/23/1978ODIMACK TRUCKS, INC10/12/197710/12/1979
Defect SummaryThe 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.
Consequence Summary
Corrective SummaryDealer will replace the original fan with a steel fixed blade fan, free of charge.
NotesVehicle 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.
POWER TRAIN - DRIVELINE - UNIVERSAL JOINT
76V118000MACK TRUCKS, INCORPORATED V (Vehicle)10510/28/1976MFRMACK TRUCKS, INC07/28/197610/12/1979
Defect Summary
Consequence Summary
Corrective Summary
NotesMack truck campaign no sco #77.trucks equipped with rockwell internationalfront drive axle fds-1807 series universal.possibility that a material defectexists in the bearing caps of the cardan joint assembly at wheel ends of axleassembly.this condition could cause failure of the cardan joint and result inloss of steering control without prior warning to driver, with possible vehiclecrash.(correct by inspecting and replacing cardan joints).heavy truck.
SEAT BELTS - FRONT - ANCHORAGE
77V204000MACK TRUCKS, INCORPORATED V (Vehicle)1104/14/1978MFRMACK TRUCKS, INC11/21/197710/12/1979571207
Defect SummaryThe involved vehicles do not conform to federal motor vehicle safety standard nos. 207, seating systems, and 210, seat belt assembly anchorages. vehicles equipped with viking t-bar seats have the seat belt anchorage located under the seat. the tether belt ruptured when subjected to the forces required in the safety test.
Consequence Summary
Corrective SummaryDealer will relocate the tether belt floor anchorage to correct the problem, without charge to owner.
NotesVehicle description: heavy trucks equipped with viking t-bar seats.system: interior; seat & shoulder belt anchorage.consequences of defect: in the event of a vehicle accident, the seat belt maynot provide adequate restraint to the wearer and serious personal injury couldresult.
SERVICE BRAKES, AIR - ANTILOCK - CONTROL UNIT/MODULE
78V068000MACK TRUCKS, INCORPORATEDfrom 10/01/1974 to 03/01/1976V (Vehicle)970009/01/1978ODIMACK TRUCKS, INC04/04/197810/12/1979
Defect SummaryAn 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.
Consequence Summary
Corrective SummaryThe dealer will inspect and, if necessary, replace the anti-wheel lock controller without charge to owner.
NotesVehicle 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.