Mack Hmm 1977

Model Hmm made in 1977 by Mack got 4 recalls. There were some recalls concerningengine and engine cooling, seat belts and suspension.

Model 1977

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.
SEAT BELTS - FRONT - ANCHORAGE
77V174000MACK TRUCKS, INCORPORATED V (Vehicle)659108/23/1978MFRMACK TRUCKS, INC10/12/197710/12/1979571209
Defect SummaryThe involved vehicles do not conform to federal motor vehicle safety standard no. 209, seatbelt assemblies. although the seatbelts in question performed marginally with respect to the 5000 lb. load requirement, additional testing confirmed that the anchor could fail, allowing either the anchor to slip over the hold-down nut or the anchor to separate into two pieces.
Consequence Summary
Corrective SummaryDealer will inspect and, if necessary, replace seat belt assemblies without charge to owner.
NotesVehicle description: trucks.system: interior; seat belt anchorage assembly.consequences of defect: in the event of an accident, these seat belts may notadequately restrain passengers and serious injuries may result.
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.
SUSPENSION - REAR - SPRINGS - LEAF SPRING ASSEMBLY - HANGER/BRACKET
77V205000MACK TRUCKS, INCORPORATEDfrom 05/01/1977 to 10/01/1977V (Vehicle)740003/14/1978MFRMACK TRUCKS, INC11/21/197710/12/1979
Defect SummaryA deficiency exists in the welds securing the rear spring insulator bracket to the axle housing. this is due to improper positioning of the weld, in relationship to the bracket and axle housing. failure of the welds would cause separation of the spring insulator bracket and the axle housing, resulting in improper alignment of the affected axle.
Consequence Summary
Corrective SummaryDealer will reweld the insulator spring bracket at no cost to owner.
NotesVehicle description: heavy trucks.system: suspension; tandem axle.consequences of defect: this condition could cause a loss of vehicle controland a vehicle accident.