Fuel system, other: storage: tank assembly: pressure relief devices
Manufacturer
MACK TRUCKS, INC
Vehicles affected
317
Reported to NHTSA
2004-04-07
Owners notified
2004-04-06
Defect description
ON CERTAIN CHASSIS BUILT WITH LNG ENGINES, THE NEXGEN LNG TANK'S PRIMARY AND SECONDARY RELIEF VALVES COULD FAIL TO OPEN AND RELIEVE TANK PRESSURE.
Safety risk
THIS COULD CAUSE ICE BUILDUP ON THE DISCHARGE SIDE OF THE PRIMARY AND SECONDARY PRESSURE SYSTEM ALLOWING THE RELIEF SYSTEM TO FREEZE AND BECOME BLOCKED RESULTING IN OVER PRESSURIZATION OF THE LNG TANKS CREATING THE RISK OF CATASTROPHIC TANK RUPTURE WHICH COULD CAUSE SERIOUS INJURY OR DEATH.
Manufacturer remedy
DEALERS WILL RETROFIT THE LNG TANKS WITH A NEW PRIMARY RELIEF VALVE PIPE AWAY TUBE AND A NEW VENTILATED SHROUD. THE RECALL BEGAN APRIL 6, 2004. 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 1-610-709-3337.
VEHICLE DESCRIPTION: CLASS 8 HEAVY DUTY TRUCKS. DURING ASSEMBLY, INSUFFICIENT TORQUE OCCURRED OF THE DRAG LINK TO THE AXLE STEERING ARM CONNECTION. IF THE DRAG LINK TO AXLE STTERING ARM CONNECTION IS NOT TORQUED AND THE COTTER PIN IS NOT INSTALLED, THE NUT COULD BACK OFF DURING VEHICLE OPERATION.
Safety risk
IF THE NUT BACKS OFF, THERE COULD BE A LOSS OF DRIVER CONTROL.
Manufacturer remedy
DEALERS WILL RETORQUE THE DRAG LINK TO THE AXLE STEERING ARM CONNECTION.
Owner complaints
A complaint is one person's report to a federal agency. It is not a finding.
Component
Complaints
Median mileage
Engine and engine cooling: engine: gasoline
1
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The 1996 model has roughly the same number of complaints as this one. These figures reflect raw complaint counts, not failure rates. Higher-selling model years naturally receive more complaints.
Safety recall repairs are provided free of charge by franchised dealers, regardless of vehicle age or mileage. This page displays aggregated data for the model year. To check recall status for a specific vehicle, search its VIN at nhtsa.gov.