2007 Nabi 60BRT problems

What is wrong

Nabi is recalling 579 my 2005-2007 60brt model year 2007 65brt and my 2003-2004 60lfw transit buses. These buses may contain a defective welded crossmember assembly in the understructure. This crossmember is a welded assembly that includes a steel channel welded to the articulated joint casting at the front trailer section of the bus. Under certain conditions, this weld may crack and the welded crossmember assembly may begin to separate. Once partial separation occurs, the center portion of the bus in the area of the front of the trailer may drop. If this condition is undetected, additional separation of the joint may occur until the front section of the trailer contact the road surface.

Risk

This could result in loss control of the bus increasing the risk of a crash. This could also result in a loss of electrical power and engine controls. This loss of electrical power and engine controls may render the vehicle stalled in a roadway. Additionally, the floor inside the vehicle will become uneven posing a risk to passengers in the vehicle.

Remedy

Dealers will inspect and repair including installation of an additional reinforcement to the affect joint. This repair will be performed free of charge. The recall began on april 30, 2009. Owner may contact nabi at 1‑888‑391‑1777.

Recall number 09V133000 · Recall details

What is wrong

On certain transit buses equipped with graham white air dryers, the air dryer timer modules may allow sufficient quantities of moisture to enter and affect the operation of the vehicle air brake system.

Risk

Failure of the air brake system due to moisture could result in a crash.

Remedy

Nabi, in conjunction with graham-white, will replace the air dryer timer module on the affected vehicles. The recall began on may 31, 2007. Owners may contact nabi at 1‑256‑831‑4296 or graham-white at 540‑387‑5620.

Recall number 07V205000 · Recall details

This investigation was opened as the result of a report alleging that an articulating bus owned by the chicago transit authority (cta) had experienced a weld failure at the articulation joint of the bus.in early april, odi and vrtc engineers visited with the cta and confirmed the failure allegation. The separation of the nabi articulating bus was the result of a weld failure that occurred in the parent metal of the rolled plate bracket. The fracture occurred just beyond the weld line where the bracket is welded to the articulating joint casting.the fatigue fracture appeared to be caused by torsional force loading through the joint configuration.bending moment fatigue initiated the fracture caused by fore and aft rotational loading that could be generated by, among other forces, both positive and negative wheel torque (acceleration and braking).a visual evaluation of the surrounding structure suggests that several welded members form a box beam and are intended to react to the torque and prevent the main structural weld from bending, but the un-reinforced materials appear to be inadequate for the forces generated in this application. On april 16, 2009, nabi identified a defective welded crossmember assembly in the understructure of these buses.after further evaluation, nabi decided to file a defect report with the agency. Nabi will arrange to inspect and repair all affected buses, including installation of additional reinforcement to the affected areas.this recall action resolves the issues raised by this investigation. Accordingly, this investigation is closed.

PE09018