Answer :
Final answer:
The emergency brake uses the rear drum brakes and engages the brake shoes, making it impossible to remove the drum. Furthermore, high brake temperature during maintenance can affect the emergency brake system.
Explanation:
The emergency brake should not be engaged when the rear drum brakes are being changed because it will not allow you to remove the drum. The emergency brake operates using the rear drum brakes. Therefore, when engaged, the brake shoes expand outwards, pressing against the brake drum and making it impossible to remove. Disengaging the emergency brake retracts the shoes, enabling you to remove the drum.
Furthermore, any heat or friction caused during brake maintenance can affect the emergency brake system. This is applicable especially if the vehicle has been recently driven and the brake temperature is higher than ambient temperature. The engine braking system and regenerative braking used in hybrid and electric cars are entirely different systems and do not operate under the same principles.
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