One problem related to oil pump has been reported for the 2004 Ford F-550. The most recently reported issues are listed below.
The contact owns a 2004 Ford F-550 sd. While driving approximately 5 mph, the engine stalled without prior warning. The vehicle failed to restart and it was towed to an independent mechanic who stated the failure was contributed to the high pressure oil pump. The vehicle was repaired. The manufacturer was notified of the problem. The approximate failure mileage was 30,000.