TM 9-2320-209-10-1 FRAME 5 CAUTION Brush rack teeth (1) with wire brush as necessary when boring soil that sticks to rack teeth. This will prevent dirt from getting into and damaging thrust plate inside of rack carriers (2). Keep leveling worms and gears (3) free of sand and dirt to prevent damage to gears. 1. Take less load on auger (4) before lifting when boring in sandy clay or wet soil. Too much suction will make load too heavy and strain the machine. 4-351