MIL-W-52125B
Established component and vehicular rating and capacities shall not be increased to meet the requirements of this specification. The dolly drawbar shall be in the straight-ahead towing position. The minimum practicable number of components may be removed to meet the reducible height specified in (f). Any sectionalization and reassembly required shall each be accomplished in not more than 3 hours without cutting or welding.
(a) Total weight 60,000 lbs., max. (b) Fifth wheel load limit 30,000 lbs., max. (c) Axle load limit, each axle 18,000 lbs., max. (d) Overall length 600 in., max. (e) Overall width 120 in., max. (f) Reducible highway transport height 162 in., max. (g) Ground clearance (SAE J894) 9.5 in., min. (h) Ground clearance excluding axles with dolly
and with either truck-tractor (M123 and M52) 12 in., min.
(i) Upper fifth-wheel height
(1) Semitrailer level 58 in.
(2) for 10 ton M123 (see MS500070) 64 in. (3) for 5 ton M52 (see MS500008) 55 in.
(j) Landing gear (front) clearance radius 90 in., min. ("LWC" of SAE J701)
(k) Swing radius ("SR" of SAE J701) 58 in., max.
(l) Kingpin setting range ("KP" of SAE J701) 21 in. through 36 in.
(m) Center-of-gravity height 110 in., max.
3.1.3 Ease of Maintenance. All major assemblies and installed attachments shall be accessible for maintenance and repair utilizing common tools and special tools furnished with the unit. The replacement and adjustment of components and accessories shall be accomplished
with minimum drainage and with minimum disturbance to other components of the unit. Ease of maintenance provisions shall incorporate to the maximum practicable extent features insuring operating clearances and facilitating maintenance and servicing operations. Unless otherwise specified herein, covers, plates, panels, and guards which must be removed for adjustment, maintenance, or component removal shall be held in place by nonremovable studs, washers,
lock-washers, and nuts. Where practicable, access shall be provided by a hinged door, and
hinges shall be welded to door and frame of opening. Such doors shall be provided with a hinged or nonhinged hasp which mates with a nonremovable stud, and be held closed by a lockwasher and nut.
3.2 Preproduction model. The supplier shall furnish a unit for examination and test within the time frame specified (see 6.2) to prove, prior to starting production, that his production methods and choice of design detail will produce units that comply with the
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