SECTION III. TECHNICAL PRINCIPLES OF OPERATION

TM 5-2590-512-13&P Reference. Always refer to applicable operator's TM for SEE vehicle when operating Earth Auger Assembly. 1-9. Equipment Data. Operating Range - Hydraulic pressure of Earth Auger Assembly is 2,000 to 3,000 PSI (13,790 to 20,684 Kpa) with oil flow of 14 to 25 GPM (52.9 to 75 LPM (Liters Per Minute)). Weight. - Earth Auger Assembly weighs 415 lbs. Auger Drive Unit weighs 225 lbs. and Auger weighs 190 lbs. Appropriate personnel or a lifting device is required to lift and move the Auger when it is removed or installed on Auger Drive Unit. Lifting limits of personal must not be exceeded. 1-10. Safety Cautions. Read and understand SEE operator's manual, and Earth Auger Assembly operator instructions in Chapter 2 of this manual, before operating or servicing. Read and understand all safety precautions, instructions, Warnings, and Cautions prior to transporting, setting up, operating, storing or attaching to SEE vehicle. They guide you to avoid injury and machine damage. Do not connect hydraulic hoses to Auger Drive Unit until it is mounted by connecting link to SEE vehicle. Ensure hoses are securely mounted in place in their clamps prior to operating boom. Loose hoses are easily trapped and crushed by boom movement. After digging hole, do not touch foot pedals when hoisting of Auger out of ground or boom will swing and bend Auger. Wipe dirt off of quick disconnect fittings prior to connecting and use attached dust caps when disconnected. Use care not to lose hitch pin clip when installing or removing Auger from Auger Drive Unit. Safety reasons do not allow a holding chain to be attached because of Auger rotation. Observe lift limits of personnel in lifting or moving Earth Auger Unit or Auger. Use a lifting device when available. Wear heavy gloves when moving or lifting Earth Auger Unit or Auger. SECTION III. TECHNICAL PRINCIPLES OF OPERATION. 1-11. Auger. Auger Drive Unit and Auger are two components that make up the Earth Auger Assembly. Earth Auger Assembly is connected to boom/dipper, thru a connecting link, at rear of SEE vehicle in place of bucket. An installation kit adapts one bucket control lever so that moving it will it cause Auger to rotate clockwise or counterclockwise. a. Auger Drive Unit. Auger Drive Unit contains chain driven sprockets that rotate attached Auger at high torque output. Auger is driven by an internal hydraulic motor using fluid under pressure delivered through hoses from attached SEE vehicle hydraulic pump. Quick disconnect fittings, on hydraulic hose ends, allow removing rotational source, for safety reasons, when servicing. b. Auger. 1. Auger is almost seven feet in length, spiral shaped, and can dig a 12 in. diameter hole into natural terrain. To dig, SEE operator, from seat at rear of SEE, moves control levers and foot pedals that move auger into position over hole site, lower boom, dipper and rotate Auger. 1-4