Technician A says excessive drive belt tension can cause wear on the upper, front main bearing. Technician B says maintaining proper oil clearance and a lower viscosity oil will increase the fatigue life of a bearing. Who is right?

Question

Quizplus · Accepted Answer

Excessive drive belt tension can indeed cause additional wear on the upper, front main bearing due to the increased load and stress it places on the engine components. Proper oil clearance and lower viscosity oil can reduce friction and wear, but they do not directly increase the fatigue life of a bearing. Fatigue life is more related to the material properties and operating conditions such as load and speed.

Technician a Says Excessive Drive Belt Tension Can Cause Wear