JMFD Trucks 141 – First out truck on structure fire responses 143 – Pumper/Tanker. 2nd out vehicle on structure fire responses. 144 – Grass Rig. 1st out truck on brush and wildland fires. 146 – Wildland, Brush Vehicle, Medical. Used for wildland fires and medical rescue. 149 – Rescue, Medical. 1st out truck on medical calls and vehicle accidents.