Recalls for your 1981 Mack Ms300p

Recalls for 1981 Mack Ms300p

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3 recalls found.
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DEFECT #1 - EXTERIOR LIGHTING:HEADLIGHTS


Posted on: 1982-05-27
Description
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.

Consequence


Corrective Action
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.

DEFECT #2 - VISIBILITY:DEFROSTER/DEFOGGER SYSTEM:WINDSHIELD:BLOWER


Posted on: 1982-01-08
Description
When the ignition key is in the on position and the heater is operating at the low or medium setting, the heater switch wiring will overload in the event the heater motor seizes.

Consequence


Corrective Action
A speed variation resistance unit and an electric motor moisture protection cap will be installed without charge.

Notes
Vehicle description: trucks.system: heating; cab heater motor, electrical switch.consequences of defect: if the vehicle is standing still (parked or stopped intraffic) heat generated by the overload may melt and ignite the surroundingplastic housing and wire covering.  A fire could spread quickly throughout thecab, causing serious injury to vehicle occupants.note: owner is advised to make sure heater/defroster fan motor is functionalbefore using cab heater prior to repair.  Heater/defroster blower should not beused in low or medium speeds while the vehicle is stopped or engine isidling.

DEFECT #3 - POWER TRAIN:DRIVELINE


Posted on: 1981-07-17
Description
Holes drilled in the rear axle yokes to balance them could cause a failure of the yoke.

Consequence


Corrective Action
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.