Nov. 21, 2011—Tiffin Motorhomes recalled 2011 Allegro and Phaeton recreational vehicles that are built on freightliner chassis and are equipped with a Cummins ISC, ISL, ISM, or ISX diesel engine.
The V-band clamp assembly (part numbers q187684, q187685 and q187686) that is used to connect the inlet and outlet cone sections to the diesel oxidation catalyst (DOC)/diesel particulate filter (DPF) includes a T-bolt that can fracture and fail when it’s subjected to stress or load. A fracture or failure of the T-bolt might cause the clamp to loosen and the inlet or outlet sections that are attached to the DOC/DPF housing to disconnect.
If the inlet or outlet sections disconnect, hot exhaust gases can vent before they exit the tailpipe, which would create the risk of combustion and a fire. If both clamps fail, the DOC/DPF housing might detach completely, which would create a road hazard.
Tiffinis working with Cummins to identify and notify owners of the recall campaign. Repairs will be performed by authorized Cummins dealers free. Owners may call Cummins at 812/377-5000 or Tiffin at 256/356-8661. Owners also may call National Highway Traffic Safety Administration’s Vehicle Safety Hotline at 888/327-4236 or go to safercar.gov.