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NHTSA Campaign 04V171000

EQUIPMENT:MECHANICAL

Issued by MAC TRAILER MFG., INC. · Reported Apr 8, 2004 · 310 vehicles affected

What's wrong

ON CERTAIN FRAME AND FRAMELESS DUMP TRAILERS, THE 8-INCH FIVE STAGE TELESCOPIC CYLINDER COMMONLY REFERRED TO AS A "SUPER DUMP", WITH USE THE PACKING NUT ON THE FOURTH STAGE RETAINING THE PLUNGER CAN LOOSEN, BACKING OFF THE FOURTH STAGE. THIS CONDITION, IF NOT REMEDIED, CAN CONTINUE UNTIL THE PACKING NUT BACKS COMPLETELY OFF THE STAGE. IF THIS OCCURS, THERE IS NOTHING TO RETAIN THE FIFTH STAGE (PLUNGER) IN THE ASSEMBLY.

Consequence

WHEN THE CYLINDER IS EXTENDED TO ITS MAXIMUM STROKE, THE FIFTH STAGE CAN SEPARATE FROM THE CYLINDER ASSEMBLY CAUSING LOSS OF CONTROL OVER THE TRAILER, ALLOWING THE TRAILER TO FREE FALL, POSSIBLY CAUSING SERIOUS INJURY OR DEATH.

Remedy

PARKER HANNIFIN WILL PROVIDE A FIELD MODIFICATION KIT #375 1805 206 TO SECURE THE PACKING NUT IN POSITION FREE OF CHARGE. OWNERS WHO DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT PARKER HANNIFIN AT 1-888-231-7461 OR MAC TRAILER AT 330-823-9190.

Vehicles affected by this recall

Make Model Year Units
MAC TRAILER 1998 310
MAC TRAILER 1999 310
MAC TRAILER 2000 310
MAC TRAILER 2001 310
MAC TRAILER 2002 310
MAC TRAILER 2003 310
MAC TRAILER 2004 310

Source: NHTSA Campaign 04V171000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.