Mack F 1974

Model F made in 1974 by Mack got 5 recalls. There were some recalls concerningengine and engine cooling, service brakes, air and steering.

F year 1974

Recalls

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
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.
SERVICE BRAKES, AIR - SUPPLY - HOSES, LINES/PIPING, AND FITTINGS
75V193000	MACK TRUCKS, INCORPORATED		V (Vehicle)	2250	03/01/1976	MFR	MACK TRUCKS, INC	10/31/1975	10/12/1979
Defect Summary
Consequence Summary
Corrective Summary
Notes	Mack campaign no q1012.trucks sept.2, 1974 thru july 30, 1975.possibilitythat an error was made in the installation of the air supply piping to thetractor trailer park valve manifold.if this occurs, the primary air supplysystem becomes the sole source for supply air to the tractor trailer park valvein this condition, tractor or trailer brake operation is not affected, as longas the primary system has normal operating air pressure.however,in this couldbe hazardous to either the primary system, there will be a corresponding lossof air to the tractor trailer park valve0 and this valve, by design, willautomatically apply the emergency spring brakes, which then could only bereleased mechanically.an automatic application of the emergency spring brakeswould immobilize the vehicle and require mechanical release wheel by wheel.this could be hazordous to either the vehicle operator or to the individualreleasing the brakes.(correct by inspecting and changing piping to proper airsupply system).
75V192000	MACK TRUCKS, INCORPORATED		V (Vehicle)	1200	02/20/1976	MFR	MACK TRUCKS, INC	10/31/1975	10/12/1979
Defect Summary
Consequence Summary
Corrective Summary
Notes	Mack campaign no n/a.trucks with dual brake treadle valve piping sept.1974and mar.31, 1975.possibility that the primary and secondary air supplylines may have been connected in reverse at the dual brake treadle valve.thereversing of these supply lines does not in itself, affect vehicle braking ifboth the primary and secondary air supply systems have normal operating airpressure.however, in the event of loss of air pressure in either the primaryor secondary system, neither the primary nor secondary service brakes wouldfunction when applied.in this event, it would require manual application ofthe emergency spring brake to stop vehicle.(correct by inspecting andrerouting air supply piping as required to correct system).
STEERING - LINKAGES - KNUCKLE - SPINDLE - ARM
78V171000	MACK TRUCKS, INCORPORATED		V (Vehicle)	2100	08/10/1979	MFR	MACK TRUCKS, INC	08/08/1978	10/12/1979
Defect Summary	Deficiencies, in the form of forging laps, cracks and excessive decarburization during heat treatment, exist in the steering knuckles. stresses imposed with integral hydraulic power steering may lead to a failure in the area of the steering arm attaching boss. this type of failure would cause loss of steering control.
Consequence Summary
Corrective Summary	Dealer will inspect and, if necessary, replace the left steering knuckle with an improved type of knuckle.
Notes	Vehicle description: truck tractors.system: steering; steering knuckle.consequences of defect: loss of steering control could cause a vehicleaccident.