Mack Rd 1977

Model Rd made in 1977 by Mack got 11 recalls. There were some recalls concerningengine and engine cooling, seat belts and service brakes, air.

Model 1977

Recalls


CampaignManufacturerManufacturing dateType# of units affectedDate Owner notified MfgRecall Initiated byManufacturers of recalled vehicles/productsReport Recieved DateRecord Creation DateRegulation Part NumberFMVSS Number
ENGINE AND ENGINE COOLING - COOLING SYSTEM - FAN
77V173000MACK TRUCKS, INCORPORATED V (Vehicle)4800003/23/1978ODIMACK TRUCKS, INC10/12/197710/12/1979
Defect SummaryThe 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 SummaryDealer will replace the original fan with a steel fixed blade fan, free of charge.
NotesVehicle 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.
ENGINE AND ENGINE COOLING - ENGINE
79V133000MACK TRUCKS, INCORPORATEDfrom 02/01/1977 to 03/01/1979V (Vehicle)2300011/02/1979ODIMACK TRUCKS, INC05/31/197910/12/1979
Defect SummaryIn the event of turbocharger compressor wheel failure, one or more of the four capscrews that hold the turbocharger together may be struck by parts of the compressor wheel, resulting in the capscrews being damaged. if these capscrews are damaged to the point that they allow the compressor back plate to dislocate from the turbocharger bearing housing, engine lubricating oil may be allowed to escape under pressure, contacting the engine exhaust manifold sections or turbocharger turbine housing.
Consequence Summary
Corrective SummaryDealer will install a shield for the heads of the four capscrews, along with stronger sae 8 grade 8 capscrews, if necessary, at no cost to owner.
NotesVehicle description: trucks equipped with endt (b) 676, etaz (b) 673a, and etay(b) 673a engines.system: engine and engine cooling.consequences of defect: engine lubricating oil, in the presence of a source ofignition, could lead to an engine compartment fire and serious injury tovehicle passengers.
ENGINE AND ENGINE COOLING - ENGINE - GASOLINE
78V032000MACK TRUCKS, INCORPORATEDfrom 07/01/1976 to 12/01/1977V (Vehicle)45910/26/1978MFRMACK TRUCKS, INC02/09/197810/12/1979
Defect SummaryThe synflex-type oil pressure signal line may have been routed too close to the exhaust manifold. excessive heat may cause the line to rupture, and oil leakage may occur.
Consequence Summary
Corrective SummaryThe dealer will reroute the oil pressure signal line to eliminate potential fire hazard, without charge to owner.
NotesVehicle description: trucks equipped with v-8 engines.system: engine; oil pressure signal line.consequences of defect: if oil is sprayed onto the hot exhaust manifold, avehicle fire and personal injury to occupants could result.
SEAT BELTS - FRONT - ANCHORAGE
77V174000MACK TRUCKS, INCORPORATED V (Vehicle)659108/23/1978MFRMACK TRUCKS, INC10/12/197710/12/1979571209
Defect SummaryThe involved vehicles do not conform to federal motor vehicle safety standard no. 209, seatbelt assemblies. although the seatbelts in question performed marginally with respect to the 5000 lb. load requirement, additional testing confirmed that the anchor could fail, allowing either the anchor to slip over the hold-down nut or the anchor to separate into two pieces.
Consequence Summary
Corrective SummaryDealer will inspect and, if necessary, replace seat belt assemblies without charge to owner.
NotesVehicle description: trucks.system: interior; seat belt anchorage assembly.consequences of defect: in the event of an accident, these seat belts may notadequately restrain passengers and serious injuries may result.
SERVICE BRAKES, AIR - ANTILOCK - INTERCONNECTING ASSEMBLY(WIRING)
78V210000MACK TRUCKS, INCORPORATEDfrom 10/01/1977 to 09/01/1978V (Vehicle)1937011/07/1978MFRMACK TRUCKS, INC10/03/197810/12/1979571121
Defect SummaryDelays of up to about 2 seconds may exist in the brake application times to the brakes on the bogie axles in the presence of certain types of wheel speed sensor signal discontinuities or distortions that may occur as a result of sensor wire failure. this constitutes a non-compliance to federal motor vehicle safety standard no. 121, air brake systems.
Consequence Summary
Corrective SummaryDealer will install new wheel speed sensors that incorporate improved wiring and the present bogie anti-wheel lock system will be changed to an axle-to-axle system for improved reliability.
NotesVehicle description: heavy trucks.system: service brakes; electrical wiring and connectors.consequences of defect: this delay in effective braking action could lead to anaccident under certain traffic conditions.
STEERING - LINKAGES - KNUCKLE - SPINDLE - ARM
78V172000MACK TRUCKS, INCORPORATED V (Vehicle)1380002/22/1979MFRMACK TRUCKS, INC08/08/197810/12/1979
Defect SummaryThe 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 SummaryThe dealer will inspect and, if necessary, install cross steering arms of improved design and greater strength.
NotesVehicle description: truck tractors.system: steering; steering arm.consequences of defect: loss of steering control could lead to loss of vehiclecontrol and an accident.
STEERING - WHEEL AND HANDLE BAR
79V082000MACK TRUCKS, INCORPORATEDfrom 03/01/1977 to 11/01/1978V (Vehicle)1200008/13/1979MFRMACK TRUCKS, INC04/03/197910/12/1979
Defect SummaryAn improper pinch bolt and nut may have been used in the clamping of the steering shaft to the steering gear input shaft. due to clamping force loads applied at the bolt, the nut could yield, resulting in looseness of the input shaft yoke. should this condition go unnoticed, spline wear could cause shaft separation.
Consequence Summary
Corrective SummaryVehicles will be inspected and, if necessary, the correct fasteners will be installed at no charge to owner.
NotesVehicle description: heavy trucks.system: steering; steering shaft clamp bolt.consequences of defect: this defect could cause loss of vehicle control and avehicle accident.
79V134000MACK TRUCKS, INCORPORATEDfrom 06/01/1974 to 03/01/1978V (Vehicle)6415011/10/1979MFRMACK TRUCKS, INC05/30/197910/12/1979
Defect SummaryIn 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 SummaryDealer will install an additional bracket in this area to prevent the steering wheel from dislocating in the event of a bracket failure.
NotesVehicle 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.
SUSPENSION - MULTIPLE AXLE
79V017000MACK TRUCKS, INCORPORATEDfrom 01/01/1977 to 12/01/1978V (Vehicle)400008/13/1979MFRMACK TRUCKS, INC01/12/197910/12/1979
Defect SummaryA casting deficiency exists in the lower section of the caps resulting in a reduction in the thickness of the material. failure of a cap can allow the end of the rear spring to detach from the axle housing.
Consequence Summary
Corrective SummaryDealer will inspect and, if necessary, replace any of the spring insulator caps found to be defective. this will be done at no cost to owner.
NotesVehicle description: trucks, heavy.system: suspension; insulator cap.consequences of defect: loss of vehicle control can result and lead to avehicle accident.
SUSPENSION - REAR - SPRINGS - LEAF SPRING ASSEMBLY - HANGER/BRACKET
77V205000MACK TRUCKS, INCORPORATEDfrom 05/01/1977 to 10/01/1977V (Vehicle)740003/14/1978MFRMACK TRUCKS, INC11/21/197710/12/1979
Defect SummaryA deficiency exists in the welds securing the rear spring insulator bracket to the axle housing. this is due to improper positioning of the weld, in relationship to the bracket and axle housing. failure of the welds would cause separation of the spring insulator bracket and the axle housing, resulting in improper alignment of the affected axle.
Consequence Summary
Corrective SummaryDealer will reweld the insulator spring bracket at no cost to owner.
NotesVehicle description: heavy trucks.system: suspension; tandem axle.consequences of defect: this condition could cause a loss of vehicle controland a vehicle accident.
WHEELS
77V096000MACK TRUCKS, INCORPORATED V (Vehicle)82509/09/1977MFRMACK TRUCKS, INC06/17/197710/12/1979
Defect SummaryThe front wheel rim clamp studs, installed on the involved vehicles, may not have been manufactured correctly, causing a brittle condition in the thread root area. the studs could eventually crack and break when wheel nuts are tightened to specifications.
Consequence Summary
Corrective SummaryThe dealer will replace all suspect front wheel studs, without charge to owner.
NotesVehicle description: heavy trucks.system: wheels; studs.consequences of defect: wheel stud failure could cause a loosened tire assemblyand impaired vehicle control. failure of more than one stud could causeseparation of the tire and rim assembly, causing loss of vehicle control and anaccident.note: driver may be alerted to the condition by a wobble or vibration in theaffected wheel.