Investigation completed on a smiths medical syringe infusion pumps|medfusion 4000 pumps complaint of motor rate error and plunger rotates was found to be customer induced.The event log revealed motor rate error but not able to be duplicated during testing, however the plunger head would rotate.This was isolated to the screws broken off the plunger tube in the carriage causing the plunger to rotate.Action was taken to replace the plunger tube with carriage.Also replaced was worm coupling and gear as a preventative measure for motor rate error in history.Device passed all functional testing.
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