Pumping up the brakes Published June 23, 2011 GRISSOM AIR RESERVE BASE, Ind. -- Chuck Long, a vehicle mechanic with Data Monitor Systems, Inc., installs an air governor onto a fire truck recently. The governor will help regulate air pressure on the brake system of the truck. The work was being done in Dock 5, while renovations are underway to the transportation facility in Bldg. 420. The 434th ARW is the largest is KC-135R Stratotanker unit in the Air Force Reserve Command. Stay connected, visit Grissom onFacebook and Twitter.