NHTSA Recall 04V171000: Mechanical (equipment)
MAC TRAILER MFG., INC. reported this safety recall to NHTSA on , covering an estimated 310 vehicles. It affects 1998–2004 Mac Trailer.
| NHTSA campaign | 04V171000 |
|---|---|
| Component | EQUIPMENT › MECHANICAL |
| Report received | April 8, 2004 |
| Initiated by | NHTSA Office of Defects Investigation |
Defect
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.
Safety risk
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.
Notes
Customers can contact the national highway traffic safety administration's auto safety hotline at 1-888-dash-2-DOT (1-888-327-4236).
Vehicles covered by recall 04V171000
Being listed here means the campaign covers the model year, not that every car was built with the defect or is still unrepaired. Enter your VIN above to check your specific vehicle. Recall repairs are free at authorised dealers. Source: NHTSA, October 2026.