Which of the following is NOT a step in servicing a dual master cylinder?

Cleaning the master cylinder with a degreasing solvent is not typically a standard step in servicing a dual master cylinder. Instead, the focus during service usually lies on inspecting, replacing, and testing essential components and functions of the system.

When servicing a dual master cylinder, inspecting for corrosion is critical as it can lead to failures in the braking system, necessitating detailed examination of all parts. Replacing the internal seals is also a standard practice to ensure the hydraulic system remains tight and operates effectively without leaks. Testing for leaks is fundamental to ensure that the master cylinder is functioning correctly and there are no issues with brake fluid integrity.

While cleaning may be necessary in some scenarios, using a degreasing solvent can potentially damage internal components or disturb the hydraulic seals, which is why it is not considered a direct step in the servicing process. Thus, focusing attention on the integrity and functionality of the master cylinder is more essential.