Mack Wl 1974

Model Wl made in 1974 by Mack got 7 recalls. There were some recalls concerningengine and engine cooling, service brakes, air and steering.

Wl 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 - DRUM - CHAMBER
76V083000	MACK TRUCKS, INCORPORATED		V (Vehicle)	404	10/04/1976	MFR	MACK TRUCKS, INC	06/09/1976	10/12/1979
Defect Summary
Consequence Summary
Corrective Summary
Notes	Mack campaign no q1014.truck-tractor equipped with fa536c and fa537c seriesfront axles.possibility that the front axle mounted brake chamber may contactthe cab tilt cylinder, under extreme axle articulation.if this conditionexists, it may result in an inoperative front brake causing loss of brakeing onthe affected wheel, and could adversely affect steering stability during brakeapplication.(correct by inspecting and providing additional clearance betweenthe affeced parts).
SERVICE BRAKES, AIR - DRUM - DRUM
75V060000	MACK TRUCKS, INCORPORATED		V (Vehicle)	600	08/05/1975	MFR	MACK TRUCKS, INC	04/15/1975	10/12/1979
Defect Summary
Consequence Summary
Corrective Summary
Notes	Mack campaign no n/a.trucks mfg'd april 1, 1974 thru nov.15, 1974.possibility that on models with outboard-mounted brake drums and steel discwheel on aluminum wheel hubs, the manufacturing tolerances may cause aninterference problem between the inside portion of wheel and outer edge of castdrum.this condition results in overstress of wheel studs.the failure ofwheel studs could cause separation of disc wheel from chassis and could causeloss of vehicle control.(correct by inspecting and adjusting to precludeinterference where necessary).
SERVICE BRAKES, AIR - SUPPLY - CHECK VALVE
75V141000	MACK TRUCKS, INCORPORATED		V (Vehicle)	935	11/17/1975	MFR	MACK TRUCKS, INC	07/24/1975	10/12/1979
Defect Summary
Consequence Summary
Corrective Summary
Notes	Mack campaign no sco-63.trucks mfg'd dec.12, 1974 thru june 30, 1975.possibility that the trailer supply control valve exhaust port was inadvertenlyplugged, and the safety valve on the air reservoir may have been omitted.ifthis condition exists it could lead to intermittent lockup of the trailerbrakes and difficulty in charging the trailer brake air system.(correct byinspecting and installing valve and unplug control valve).
STEERING - GEAR BOX (OTHER THAN RACK AND PINION)
77V011000	MACK TRUCKS, INCORPORATED		V (Vehicle)	2200	03/29/1977	MFR	MACK TRUCKS, INC	01/01/1977	10/12/1979
Defect Summary	The lower steering shaft yoke clamp bolts on the involved vehicles may not have been sufficiently tightened. should these bolts lossen and come off, the lower steering shaft could separate from the steering gear.
Consequence Summary
Corrective Summary	The dealer will secure the clamp bolt and make the necessary modifications on the lower steering shaft, free of charge.
Notes	Vehicle description: heavy trucks.system: steering; steering shaft, lower.consequences of defect: separation of the lower steering control shaft loweryoke may result in loss of steering control and an accident.
STEERING - WHEEL AND HANDLE BAR
75V140000	MACK TRUCKS, INCORPORATED		V (Vehicle)	402	12/15/1975	MFR	MACK TRUCKS, INC	07/24/1975	10/12/1979
Defect Summary
Consequence Summary
Corrective Summary
Notes	Mack campaign no sco-62.trucks mfg'd dec.13, 1974 thru june 25, 1975.possibility the clamp around the steering column may have been incorrectlypositioned on the steering column, which could result in steering shaft splineengagement being less than specified.if this condition exists it could resultin steering shaft spline disengagement with loss of steering control.(correctby inspecting and adjusting steering column clamp where necessary).