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|  MIL-T-45380E(AT)
from the vertical off the rear of the truck. The auger shall bore holes up to 10 degrees from the
vertical toward the truck and handle poles up to 75 feet in length. Depth of holes shall be
measured from the ground level to the top of the loose dirt at the bottom of the hole.
3.5.3.2 Leveling mechanisms. The boring assembly shall be equipped with a hydraulic
leveling device to permit the setting of the auger in a vertical position regardless of the tilt of the
truck. Leveling devices shall permit elevating the auger shaft to the operating position and
lowering to the traveling position.
*
3.5.3.3 Stabilizing supports. Two hydraulically operated modified "A" frame stabilizing
supports shall be furnished to support the truck during drilling operations. The supports shall
have a minimum spread of 125 inches.
*
3.5.3.4 Auger. The auger shall be raised, lowered, rotated, and forced into the earth by a
hydraulically controlled mechanism. A minimum 6,500 pound capacity, hydraulically
operated, telescoping derrick, sheave, and pole guide shall be furnished. A trombone tube
assembly shall be provided to supply hydraulic oil to the pole guide and prevent hose damage.
Exposed hoses not protected/trombone enclosed are not acceptable.
*
3.5.3.5 Auger bits. One each, Pengo heavy duty, twin helix type auger bit or equal, of
the following sizes shall be furnished: 16-inch, 24-inch, 30-inch, and 36-inch. Bullet ripper
teeth, shank plates and pilot bit shall be included.
3.5.4 High speed throw-off. A high speed throw-off shall be provided. Operation of the
high speed throw-off shall not be dependent on shifting the transmission. The throw-off speed
shall be sufficient to clear soil from the auger bit and deposit it so that when the auger is digging
maximum depth holes, the soil will not fall back into the hole.
*
3.5.5 Auger unit winch. A heavy duty, single drum winch having the rated single line
pull capacity of not less than 10,000 pounds on the bare drum shall be furnished. The winch
shall have not less than one forward and one reverse speed. The winch shall conform to
SAE J706. An integral, adjustable, automotive safety brake shall be provided. The winch shall
be wound with 150 feet of 7/16-inch, preformed, 6x37, improved plow steel, wire rope having
nominal breaking strength in excess of 10,000 pounds. The winch shall be direct coupled
powered (winches supplied with chains and sprockets not acceptable) by the auger engine to
permit independent operation of the auger or winch. A winch line hook shall be provided.
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