6 recalls found. |
DEFECT #1 - TRAILER HITCHES:FIFTH WHEEL ASSEMBLY
Posted on: 2000-05-11
Description
Vehicle description: heavy duty class 8 trucks equipped with fontaine fifth wheel assemblies. The fifth wheel mounting plates can crack.
Consequence
Under the trailer loading, the mounting plate could eventually fail due to fatigue.
Corrective Action
Dealers will inspect and replace the mounting plates that are cracked.
Notes
Mack recall no. Sco259.owner notification began june 22, 2000.owner notification is expected to begin owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact mack at 1-610-709-3011. Also contact the national highway traffic safety administration's auto safety hotline at 1-888-dash-2-dot (1-888-327-4236).
DEFECT #2 - SERVICE BRAKES, AIR:SUPPLY:HOSES, LINES/PIPING, AND FITTINGS
Posted on: 1995-09-27
Description
Air system blockage in the air dryer occurs degrading the moisture removing capabilities of the dryer when the vehicle is operated in a cold environment and moisture accumulates and freezes in the air dryer or in the line between the dryer and the air system reservoir. The air dryer can become overpressurized causing the air dryer cartridge to separate from the mounting base.
Consequence
If the air dryer separates from the base, the cartridge can separate sufficiently enough to cause personal injury or property damage.
Corrective Action
Dealers will equip air systems with a pressure relief valve to be located between the compressor and the air dryer. This pressure relief valve is intended to vent if excessive pressure develops in the air dryer.
Notes
System: brakes; air dryer. Vehicle description: heavy duty class 8 trucks equipped with rockwell wabco system saver 1000 or system saver twin air dryer. Note: if your vehicle is presented to an authorized dealer on an agreed upon service date and the remedy is not provided free of charge within a reasonable time, contact mack at 1-610-709-3011.also contact the national highwaytraffic safety administration's auto safety hotline at 1-800-424-9393.
DEFECT #3 - POWER TRAIN:DRIVELINE:CENTER SUPPORT BEARING
Posted on: 1994-11-22
Description
The driveshaft center bearing support bracket can crack and break.
Consequence
If this happens, the driveshaft will wobble and can separate. Separation can result in damage to other components of the vehicle or loose fragments can fall onto the roadway presenting a hazard to other drivers.
Corrective Action
Dealers will replace the center bearing hanger bracket.
Notes
System: powertrain; driveline; bracket; support; center shaft.vehicle description: class 8 heavy trucks.note: if the vehicle is presented to an authorized dealer on an agreed upon service date and the remedy is not provided free of charge within a reasonable time or the remedy does not correct the defect, contact mack trucks at 1-610-439-3011. Also, contact the national highway traffic safety adminstration's auto safety hotline at 1-800-424-9393.
DEFECT #4 - VEHICLE SPEED CONTROL
Posted on: 1994-03-01
Description
Fuel injection system reconfiguration to comply with engine emission standards cause higher engine vibration levels which lead to early wear and complete failure of the secondary throttle return mechanism.
Consequence
In the event the primary throttle return fails, failure of the secondary throttle return system would not provide protection against loss of throttle control.
Corrective Action
A new production secondary throttle return system configuration will be installed.
Notes
System: fuel; fuel pump.vehicle description: class 8 trucks equipped with e6 and e7 engines with robert bosch p7100 mechanically-governed fuel injection pumps.note: if your vehicle is presented to an authorized dealer on an agreed upon service date and the remedy is not provided within a reasonable time and free of charge or the remedy does not correct the defect or noncompliance, please contact the national highway traffic safety administration's auto safety hotline at 1-800-424-9393.
DEFECT #5 - ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN
Posted on: 1993-09-01
Description
The engine cooling fan blades may break due to inadequate blade strength around the rivets that attach the blades to the fan spider.
Consequence
If complete fracture of the fan blade occurs, it couldbe propelled outside the fan shroud, injuring person(s) in the vicinity ofthe truck.
Corrective Action
An improved fan will be installed on these vehicles.
Notes
System: engine; cooling fan.vehicle description: class 8 heavy trucks equipped with 6 bladed fansmanufactured by engineered cooling systems, inc.
DEFECT #6 - TRAILER HITCHES
Posted on: 1993-03-25
Description
The carrier yoke bolts were manufactured with worn rolling thread dies, causing stress concentrations which caused cracks during the quenching process.
Consequence
This condition can cause bolt failure and allow thedriveline to separate from the carrier assembly.
Corrective Action
Replace the carrier yoke bolts.
Notes
System: trailer yoke.vehicle description: heavy trucks.