Mack Dmm 1976

Model Dmm made in 1976 by Mack got 4 recalls. There were some recalls concerningengine and engine cooling, power train and service brakes, air.

Dmm year 1976

Recalls

Model 1976

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.
POWER TRAIN - DRIVELINE - UNIVERSAL JOINT
76V118000	MACK TRUCKS, INCORPORATED		V (Vehicle)	105	10/28/1976	MFR	MACK TRUCKS, INC	07/28/1976	10/12/1979
Defect Summary
Consequence Summary
Corrective Summary
Notes	Mack truck campaign no sco #77.trucks equipped with rockwell internationalfront drive axle fds-1807 series universal.possibility that a material defectexists in the bearing caps of the cardan joint assembly at wheel ends of axleassembly.this condition could cause failure of the cardan joint and result inloss of steering control without prior warning to driver, with possible vehiclecrash.(correct by inspecting and replacing cardan joints).heavy truck.
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.
STEERING - LINKAGES - KNUCKLE - SPINDLE - ARM
78V172000	MACK TRUCKS, INCORPORATED		V (Vehicle)	13800	02/22/1979	MFR	MACK TRUCKS, INC	08/08/1978	10/12/1979
Defect Summary	The existing cross steering arms may have insufficient fatigue life in the neck area. this is near the boss for the cross steering tube ball joint connection. failure of either of the cross steering levers could lead to loss of steering control of the right front wheel.
Consequence Summary
Corrective Summary	The dealer will inspect and, if necessary, install cross steering arms of improved design and greater strength.
Notes	Vehicle description: truck tractors.system: steering; steering arm.consequences of defect: loss of steering control could lead to loss of vehiclecontrol and an accident.