1981 MACK MS300T Recalls (4)
- Campaign:
- 81V032000 on 04/07/1981
- Component:
- Service brakes, hydraulic:switches:brake light
- Manufactured:
- 10/31/1980 - 01/31/1981
- Affected:
- 150
- Defect:
- On certain vehicles, the semi-trailer stop lights may not activate when hand control lever is activated.
- Correction:
- After inspecting brake light system, a switch will be installed which will activate the trailer stop light when the hand control valve is used, if necessary.
- Notes:
- Vehicle description: heavy trucks.system: lighting; rear brake lights, trailer stop lamp wiring.consequences of defect: rear-end collision could result due to failure oftrailer stop lamps. operater of vehicle to the rear would not be warned ofbraking action on affected vehicles.
- Campaign:
- 81V089000 on 07/16/1981
- Component:
- Power train:driveline
- Manufactured:
- 10/31/1980 - 05/31/1981
- Affected:
- 500
- Defect:
- Holes drilled in the rear axle yokes to balance them could cause a failure of the yoke.
- Correction:
- Vehicles will be inspected and all defective yokes will be replaced with yokes without holes.
- Notes:
- Vehicle description: trucks.system: suspension; rear axle yoke.consequences of defect: the yoke could fail without warning during vehicleoperation, possibly causing loss of vehicle control and an accident. also, thefailure could cause shrapnel to be propelled outward from the vehicle, injuringanyone within close proximity.note: the failure is most likely to occur when the vehicle is first started orwhile driving at moderate or high speeds in a heavy torque condition.
- Campaign:
- 82V054000 on 05/26/1982
- Component:
- Exterior lighting:headlights
- Manufactured:
- 06/30/1979 - 04/30/1982
- Affected:
- 5,700
- Defect:
- The circuit wiring on these vehicles is arranged so that a short circuit in the rear taillights will also result in loss of power to the headlamps. for safety reasons the lighting system wiring should be independent.
- Correction:
- Vehicles will have an automatic reset circuit breaker installed to ensure continued headlamp illumination in the event of a short in other lighting systems.
- Notes:
- Vehicle description: trucks.system: lighting; head lamp wiring.consequences of defect: simultaneous loss of both taillights and headlampsduring night driving could result in a head-on or rear-end collision.
- Campaign:
- 83V102000 on 10/20/1983
- Component:
- Power train:manual transmission
- Manufactured:
- 10/31/1980 - 06/30/1981
- Affected:
- 565
- Defect:
- The yoke of the transmission propeller shaft may lack required strength due to erroneous counterbore operation in which 10 millimeters of extra material may have been cut. this condition could lead to fracture of the yoke in service.
- Correction:
- All affected parts will be inspected and replaced, if necessary.
- Notes:
- Vehicle description: trucks.system: power train; transmission propeller shaft yoke.consequences of defect: during engine operation at heavy throttle, as invehcile starting, fragments of a fractured yoke could be propelled outward andcause injury to nearby persons.note: the fracture could also occur without warning during normal highwayoperation, resulting in loss of power at the driving wheels, difficulty inmaintaining vehicle control, and a possible accident.
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