Mack Hmm 1974
Model Hmm made in 1974 by Mack got 2 recalls. There were some recalls concerningengine and engine cooling, service brakes, air.
Model 1974
Recalls
| Campaign | Manufacturer | Manufacturing date | Type | # of units affected | Date Owner notified Mfg | Recall Initiated by | Manufacturers of recalled vehicles/products | Report Recieved Date | Record Creation Date | Regulation Part Number | FMVSS Number | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ENGINE AND ENGINE COOLING - COOLING SYSTEM - FAN | ||||||||||||||||
| 77V173000 | MACK TRUCKS, INCORPORATED | V (Vehicle) | 48000 | 03/23/1978 | ODI | MACK TRUCKS, INC | 10/12/1977 | 10/12/1979 | ||||||||
| Defect Summary | 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. | |||||||||||||||
| Consequence Summary | ||||||||||||||||
| Corrective Summary | 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. | |||||||||||||||
| SERVICE BRAKES, AIR - ANTILOCK - CONTROL UNIT/MODULE | ||||||||||||||||
| 78V068000 | MACK TRUCKS, INCORPORATED | from 10/01/1974 to 03/01/1976 | V (Vehicle) | 9700 | 09/01/1978 | ODI | MACK TRUCKS, INC | 04/04/1978 | 10/12/1979 | |||||||
| Defect Summary | 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. | |||||||||||||||
| Consequence Summary | ||||||||||||||||
| Corrective Summary | 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. | |||||||||||||||