Which of the following steps do you perform after you raise and secure the landing gear?

After raising and securing the landing gear, the next logical step involves supplying air to the trailer and testing the service brake. This procedure is crucial for ensuring that the braking system functions correctly before the trailer is put into operation.

When the landing gear is raised and secured, the trailer is now at the proper height for the next steps in the coupling process. Supplying air to the trailer is important because it charges the trailer’s air brake system, ensuring that it is ready for operation. Testing the service brake ensures that the brake system is responsive and that the trailer is safe for movement, mitigating the risk of malfunctions while on the road.

Performing a tug test, conducting a visual inspection on the fifth wheel connection, and attaching air and electric lines to the trailer are also important steps in the proper coupling process. However, they follow after confirming that the service brakes are operational. Thus, testing the service brake is the appropriate next step after securing the landing gear.