TM 10-3930-664-10 a. Position the 4KRTFL so that the tow bar from the disabled vehicle can be attached to the towing pintle. NOTE Parking  brake  is  automatically  applied  when  engine  is  not  running  unless  park  brake  lockout  has  been installed. b. Stop the engine.  See para 2-14. WARNING When hooking or unhooking the tow bar lunette from a disabled vehicle, set the parking brake or chock the wheels of the disabled vehicle before hooking or unhooking the tow bar.  Otherwise, disabled vehicle may move, causing injury, death, or damage. c. Set the parking brake or chock the wheels of the vehicle to be towed. d. Attach the tow bar lunette from the disabled vehicle to the towing pintle of the 4KRTFL. e. Release the parking brake or remove the chocks from the wheels of the disabled vehicle. f. Proceed to tow with caution. 2-26. TOWING THE 4KRTFL. WARNING Carefully move the towing vehicle into position.  Always use a ground guide and any device necessary to lift the tow bar into position without standing directly between the vehicles.  Failure to follow this precaution could result in personal injury or vehicle damage. 2-49