Mack Rl 1976

Model Rl made in 1976 by Mack got 5 recalls. There were some recalls concerningengine and engine cooling, service brakes, air and steering.

Rl 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.
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
78V030000	MACK TRUCKS, INCORPORATED	from 12/01/1975 to 01/01/1978	V (Vehicle)	400	08/23/1978	MFR	MACK TRUCKS, INC	02/09/1978	10/12/1979
Defect Summary	A design deficiency exists in the air dryer piping in the area of the pressure relief valve and compressor governor control link. moisture is passed and builds up in this relief valve and control line. in freezing ambient temperatures, this moisture may freeze, allowing the chassis air system pressure to exceed 150 psi. excessive air system pressure can cause separation of air piping connections and air system valve failure.
Consequence Summary
Corrective Summary	The dealer will relocate the air system compressor governor line and pressure relief valve to eliminate moisture accumulation.
Notes	Vehicle description: trucks equipped with anchorlok air dryers.system: service brakes; air system and governor control line (air dryer).consequences of defect: when this occurs, automatic application of the chassisemergency spring brakes and trailer brakes could cause loss of vehicle controlwithout prior warning and a vehicle accident.note: owner/driver is advised not to operate vehicle if air pressure exceeds15o psi.
STEERING - WHEEL AND HANDLE BAR
79V134000	MACK TRUCKS, INCORPORATED	from 06/01/1974 to 03/01/1978	V (Vehicle)	64150	11/10/1979	MFR	MACK TRUCKS, INC	05/30/1979	10/12/1979
Defect Summary	In the involved trucks it is possible the adjustable steering column rear mounting bracket could fail, allowing steering wheel assembly to fall down onto the operators lap.
Consequence Summary
Corrective Summary	Dealer will install an additional bracket in this area to prevent the steering wheel from dislocating in the event of a bracket failure.
Notes	Vehicle description: trucks.system: steering assembly; steering wheel and column.consequences of defect: while steering would remain functional in thiscondition, the element of surprise to operator could cause loss of vehiclecontrol and an accident.
WHEELS - MULTI PIECE
77V149000	MACK TRUCKS, INCORPORATED		V (Vehicle)	250	01/17/1978	MFR	MACK TRUCKS, INC	09/19/1977	10/12/1979
Defect Summary	The front wheel aluminum hubs on the involved vehicles may be subject to cracks which may progress circumferentially around the barrel of the hub. this could lead to a fracture in the barrel position of the hub and complete hub failure.
Consequence Summary
Corrective Summary	Dealer will install steel hubs in place of aluminum hubs without charge to owner.
Notes	Vehicle description: trucks equipped with ff-931 front axles.system: wheels; aluminum hubs, front.consequences of defect: hub failure could result in loss of vehicle control andan accident.note: hub failure may be indicated by an audible sound at the instant of hubseparation, along with thumping or wheel wobble. hub may separate from thewheel and still be retained on the axle.