Vehicle recall 04V171000 · April 8, 2004
1998-2004 MAC Trailer
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…
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- 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.
- Notes
- Customers can contact the national highway traffic safety administration's auto safety hotline at 1-888-dash-2-dot (1-888-327-4236).
Recall details
- NHTSA campaign
- 04V171000
- Reported to NHTSA
- April 8, 2004
- Filed by
- MAC TRAILER MFG., INC.
- Vehicles potentially affected
- 310
- Initiated by
- NHTSA’s Office of Defects Investigation
- Components
- Equipment › Mechanical
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
Has your MAC been repaired?
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