NHTSA recall 04E017000 · Equipment
Equipment › Mechanical
The defect
8-Inch; five stage telescopic cylinder commonly referred to as a "super dump" model # s85dc-55 and s85dc-56 for use on large framed and frameless end dump trailers and manufactured between july 1996 and june 2002. 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.
The risk
When the cylinder IS then 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 even death.
The remedy
Parker mobile cylinder division will notify its customers and provide a field modification kit #375 1805 206 to secure the packing nut in position free of charge. owner notification IS expected to begin march 4, 2004. owners who do not receive the free remedy within a reasonable time should contact parker hannifin at 1-888-231-7461.