Technician A says that most Bosch CR high pressure pumps are lubricated with diesel fuel. Technician B says that Caterpillar CR high pressure pumps are lubricated with engine oil. Who is correct?

Question

Quizplus · Accepted Answer

Most Bosch Common Rail (CR) high-pressure fuel pumps are indeed lubricated by the diesel fuel they pump, while Caterpillar's high-pressure fuel systems, particularly in older models, use engine oil for lubrication. This reflects the design differences between manufacturers and their approach to lubricating these critical components.

Technician a Says That Most Bosch CR High Pressure Pumps