TM 9-2320-361-10 2-32. OPERATION OF EARTH BORING AND POLESETTING MAINTENANCE TRUCKS (Contd) (6) When auger (3) point enters ground, push feed control lever (1) forward (position 4, table 2-4) to start boring at 25 rpm (1800 engine rpm). Maintain boring speed until hole is about 18 inches deep. (7) If auger (3) is working smoothly, set auger speed for type of soil (refer to table 2-5). (8) When auger (3) is loaded, place feed (1) and drive (2) control levers in neutral, then pull drive control lever (2) back and push feed control lever (1) forward (position 5, table 2-4) to raise auger above ground. CAUTION Ž Clean rack teeth with wire brush as necessary when boring to prevent dirt from getting into and damaging thrust plate and rack carriers. Keep leveling worms and gears free from sand and dirt to prevent damage to gears. Ž Take less load on auger when boring in sandy clay, or wet soil. Too much suction will make load too heavy and may damage equipment. (9) Move drive control lever (2) in and out of neutral (position 6, table 2-4) to spin soil from auger (3). Do not press down bumper spring. (10) Place control levers (1) and (2) as necessary for drilling (refer to tables 2-4 and 2-5). (11) If auger (3) becomes overloaded: (a) Depress clutch pedal (5). (b) Place transmission gearshift lever (4) in “R” (reverse) position. (c) Release clutch pedal (5). (d) Pull feed control lever (1) back and push drive control lever (2) forward (position 2, table 2-4). Auger (3) will back out of hole. 2-171