1973 MACK CF Recalls (6)
- 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.
- Campaign:
- 74V001000 on 10/11/1979
- Component:
- Suspension
- Affected:
- 1,119
- Notes:
- Mack campaign no sco#45.equipped with fa535 front axle.trucks.possibilitythat the axle beam may have surface cracks on the underside below the springpads.such cracks could over a long period of time progress to beam failureand loss of vehicle control.(correct by inspecting and replacing wherenecessary).
- Campaign:
- 74V097000 on 10/11/1979
- Component:
- Vehicle speed control
- Affected:
- 33
- Notes:
- Mack campaign no.fire appratus with william air throttle control.built sep1 1973 thru apr 30 1974.possibility that the valve cage assembly, an internalpart of the accelerator system, could fracture resulting in an air leak orcomplete malfunction.if this occurs, it may result in poor acceleration orthe throttlesticking in any position.(correct by inspecting and installingimproved valve repair kit).
- Campaign:
- 75V143000 on 10/11/1979
- Component:
- Service brakes, air:supply:hoses, lines/piping, and fittings
- Affected:
- 363
- Notes:
- Mack campaign no sc065.model fire chassis may 17, 1972 thru june 23, 1975.possibility of interference between the front axle brake chamber inlet and theshock absorber brackets.under certain operating conditions and with the frontwheels turned either to the extreme left or right direction, the air inletfitting could contact the front axle shock absorber upper bracket and causeinlet fitting to break.this would result in loss of braking on the affectedwheel, and could affect steering stability during brake application.(correctby inspecting and relocating fitting to preclude contact with shock absorberbracket).
- Campaign:
- 85V157000 on 12/03/1985
- Component:
- Steering:wheel and handle bar
- Manufactured:
- 05/31/1973 - 09/30/1985
- Affected:
- 143
- Defect:
- The splined steering shaft may not be sufficiently engaged as designed due to inaccurate drilling of the holes in the frame to which the cab front mount member is bolted. under certain conditions the steering shaft may disengage. consequence of defect: a jarring impact might cause disengament of the splined shaft resulting in loss of steering control and possibly an accident.
- Correction:
- Replace shafts which measure under the minimum engagement dimensions with longer shaft.
- Notes:
- System: steering shaft. vehicle description: fire trucks.
- Campaign:
- 91V070000 on 05/14/1991
- Component:
- Steering:linkages
- Manufactured:
- 11/30/1967 - 11/30/1990
- Affected:
- 3,673
- Defect:
- Stresses imposed on the lever during turning maneuvers and/or impact incidents, such as would be caused by curbs or road surface irregularity, reduce the life expectancy of the part. the steering lever may crack and eventually the stresses could cause the steering lever to break.
- Consequence:
- A broken steering lever will cause loss of steeringcontrol without prior warning which may result in a vehicle crash.
- Correction:
- Replace the defective steering arms.
- Notes:
- System: steering levers.vehicle description: cf model fire chassis with gross axle weight ratings of12,000 pounds or greater and equipped with power steering.note: the specific mack axles affected are: fa532, faf532, fafw537, fafw5372,fafw13.5, faw538, faw14.3, fa604, fa6042, faw616, faw618, faw617, and faw20.
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