NISSAN DIESEL IS RECALLING 549 MY 2008 UD1800, UD2000, UD2300, UD2600, AND UD3300 MEDIUM DUTY TRUCKS. A FAILURE OF THE FUEL INJECTION PUMP DRIVE COUPLER CAN OCCUR. THE BOTTOM CORNER OF THE NOTCHED DRIVE SURFACE WAS IMPROPERLY MACHINED. WITH INCREASED FUEL PUMP PRESSURE, THE REQUIRED TURNING TORQUE ON THE DRIVE COUPLER INCREASED. THE INCREASED TURNING TORQUE COULD CRACK THE COUPLER AT THE BOTTOM CORNER WITHOUT WARNING UNDER NORMAL VEHICLE OPERATION.
RiskCONTINUED OPERATION WITH A CRACKED DRIVE COUPLER COULD RESULT IN THE COUPLER BECOMING BROKEN AND CAUSING THE ENGINE TO STALL AND NOT RESTART, INCREASING THE RISK OF A CRASH.
FixDEALERS WILL REPLACE THE FUEL INJECTION PUMP DRIVE COUPLER. THE RECALL BEGAN ON JANUARY 19, 2009. OWNERS MAY CONTACT NISSAN DIESEL AT 1-972-756-5500.