What is the correct order of steps when uncoupling the rear trailer from a converter dolly on a twin-trailer rig?

Question

Accepted Answer

Park in a straight line on firm, level ground; apply parking brakes; chock the second trailer's wheels if it lacks spring brakes; lower its landing gear enough to remove weight from the dolly; close the air shut-offs at the rear of the first trailer; disconnect and secure the dolly's air and electric lines; release the dolly brakes and fifth-wheel latch; then slowly pull the tractor, first trailer, and dolly forward to clear the dolly from under the rear trailer

Answer

Release the dolly's fifth-wheel latch first, then park the rig and apply brakes afterward

Answer

Disconnect the dolly's air and electric lines before lowering the rear trailer's landing gear

Answer

Pull the tractor forward to clear the dolly before closing the air shut-off valves at the rear of the first trailer