MIL-PRF-52470A (AT)
3.3.18 Carrier. The carrier shall be a heavy-framed, 4 axle supported, rubber-tired,
heavy-duty, self-propelled vehicle upon which the rotating superstructure is mounted. The
rotating superstructure shall be positioned in a fixed location on the carrier. Safety tread steel
plate not less than 0.3 cm (0.125 in.) in thickness shall completely cover all openings between the
carrier longitudinal frame members. This safety-tread plate shall be fastened to the frame
members by bolts.
3.3.19 Wheel drive. The wheel drive shall be powered from the carrier engine through
gear-driven axles. The drive shall be 8 by 4; four axles, two front (tandem) and two rear (tandem)
driven.
3.3.20 Carrier exhaust system. The exhaust system shall be routed vertically. The stack
shall terminate as a truck-type curved stack pipe with not less than a 37 mm (14.5 in.) radius
curve undercut to protect the exhaust system from the weather. The stack shall be made of
aluminized steel tubing. An expanded or pierced metal guard shall protect personnel from burns.
The exhaust stack shall be braced and clamped to prevent damage by vibration and shall be
equipped with a removable clamp and upper exhaust pipe with flanges held by corrosion-resistant
steel bolts, washers and nuts to facilitate reducing the stack height to below the upper half of the
cab. The muffler shall not be located in the removable portion of the exhaust stack.
3.3.21 Transmission. The transmission for the carrier shall consist of a main transmission
and an auxiliary transmission. The main transmission shall provide not less than four forward
speeds and not less than one reverse speed. The auxiliary transmission shall provide not less than
three speeds.
3.3.22 Axles. All driving axles shall be either double reduction or planetary reduction and
shall be full floating.
3.3.23 Suspension. Front spring and walking beam solid rear suspension shall be
furnished.
3.3.24 Outriggers. The carrier shall have outriggers consisting of hydraulically operated
sliding beams housed in a suitable metal box attached at right angles to the frame of the carrier.
The outriggers shall be located fore and aft of the rear tandem wheels and on each side of the
carrier. The outriggers shall be complete with not less than four hydraulic jacks and jack pads.
Each jack pad shall have not less than 645 square centimeter (cm2) (100 square inch (in2.)) of
area. With the auger on level ground the jacks shall be long enough to lift the rear tandem tires
free of the ground a distance of not less than 10 cm (4 in.) without the use of blocks. Leveling
jacks shall be individually hydraulically operated.
3.3.25 Towing attachments. Two towing eyes, shackles or hooks shall be mounted on
the front of the carrier. When the towing attachments are mounted underneath the chassis, they
shall be of the eye type and shall be not less than 7.6 cm (3 in.) in inside diameter. Each towing
8
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business