Answer :
A torque wrench is the tool used to measure pinion bearing preload, ensuring correct force application to function optimally.
option (C), Torque wrench, is the correct answer.
The tool used to check pinion bearing preload is a torque wrench (C). A torque wrench is used to measure the amount of rotational force required to rotate the pinion. The preload refers to the amount of force applied to the bearings which removes any excess play and ensures they are slightly preloaded for optimal function. The measurement is crucial because too much preload can lead to bearing overheating and failure, while too little can result in excessive play, leading to gear noise and wear.
option (C), Torque wrench, is the correct answer.
