Certified Maintenance and Reliability Technician (CMRT) Practice Test

Question: 1 / 400

Which method of bearing removal requires the shaft to be prepared in advance?

Hammer method

Hydraulic removal method

The hydraulic removal method is correct because it involves the use of hydraulic pressure to remove the bearing from the shaft. This method typically requires the shaft to be prepared beforehand to ensure that it can accommodate the hydraulic tooling effectively. The surface of the shaft needs to be clean and free of damage, and any keyways or retaining features must be properly aligned to allow the hydraulic puller to function correctly.

In contrast, the hammer method utilizes a direct impact force to drive the bearing off the shaft, which does not require prior preparation of the shaft. The puller method, while it does require some setup, generally does not necessitate as extensive preparation of the shaft as the hydraulic method. The heat method involves heating the bearing to expand it for easier removal, which also does not require advance preparation of the shaft itself.

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Puller method

Heat method

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