1. A. A tow truck shall have a power-assisted service brake system, separate from the parking brake system, capable of stopping and holding the tow truck and its load under all conditions and on any grade on which the tow truck is operated. If a tow truck’s service brake system is actuated by air, the tow truck shall be equipped with:

   1. 1. A truck-tractor protection valve; and
   2. 2. An audible or visible low air warning device that actuates at a minimum of 55 psi.

2. B. A tow truck shall have a parking brake system, separate from the service brake system, which is capable of holding the tow truck and its load. If the tow truck’s parking brake system is actuated by air, the tow truck shall be equipped with:

   1. 1. A truck-tractor protection valve; and
   2. 2. An audible or visible low air warning device that actuates at a minimum of 55 psi.

Historical Note

New Section made by final rulemaking at 12 A.A.R. 1735, effective July 1, 2006 (Supp. 06-2).