Which of the below methods can you use to ensure a second trailer before coupling
• use the tractor in first semi trailer to pick up the converter dolly and move into position
• release talley break by opening the air tank petcock or if the dolly has a spring break use the dolly parking brake control
• Will the dolly into position by hand so it is in line with the king pen
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.