To release a dolly's spring brakes before positioning the converter dolly for coupling, you should:

Question

If a converter dolly has spring brakes, you can release the brakes by using the dolly parking brake control. Releasing the dolly's brakes is the first step you should take when properly positioning the dolly in front of the rear trailer.

Accepted Answer

Use the dolly parking brake control.

Answer

Remove the air tank petcock.

Answer

Raise the dolly support.

Answer

Remove the pintle hook.