Technician A says that to properly lubricate a driveshaft U-joint with twin zerks,grease must be pumped into both nipples.Technician B says that if grease exits all four trunnion seals on a U-joint,it indicates that it has been properly greased and purged.Who is correct?

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The Answer of Technician A says that to properly lubricate a driveshaft U-joint with twin zerks,grease must be pumped into both nipples.Technician B says that if grease exits all four trunnion seals on a U-joint,it indicates that it has been properly greased and purged.Who is correct?

Technician a Says That to Properly Lubricate a Driveshaft U-Joint