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MIL-S-52124B(ME)
be furnished.  Each jack pad shall have sufficient area to reduce
ground pressure to less than 100 psi. Provisions shall be made for
stowing the pads in the toolbox.  The four stabilizing jacks shall
fold and be secured for travel.  The semitrailer landing gear shall
be of the two-speed, telescopic, nonrotating leg type, with mud pads.
The landing gear shall be in accordance with the TTMA Recommended
practice RP4-1-4.  Military truck-tractor compatibility for RP4-1-4
shall be as specified in 3.1.2(i) for the 5-ton, M52, and with step
extensions installed for the 10-ton, M123. Extensions shall be
stored on the unit when not in use.  Supports for the crank extension
shaft and clips to hold the crank in travel position shall be provided.
The landing gear shall be protected to preclude the entrance of foreign
matter which would impair its functioning or mechanical efficiency.
The landing gear shall withstand, without deformation, the combined
static and dynamic forces due to its proportion of the total weight
imposed, and the forces from impact during coupling and uncoupling
operations, with the emergency breakaway brakes actuated and chock
blocks in place.
3.14 Dolly. The dolly shall be furnished by the supplier or will
be furnished by the Government as specified (see 6.2).
3.14.1 Government-furnished dolly.  When the tiny is Government-
furnished it will be a 2-wheel, 8-ton, M198A1 dolly conforming to
MS53026.
3.14.2 Supplier-furnished dolly.
3.14.2.1 Fifth wheel. A fixed or oscillating lower fifth wheel
similar to MS53034 and compatible with the SAE J848 kingpin, shall
be furnished.  The height of the fifth wheel with semitrailer loaded
shall be 58 inches plus or minus 2 inches.
3.14.2.2 Lunette and towbar.  A lunette in accordance with MS51337
shall be installed in a housing integral with the towbar. The housing
shall support the lunette and shall be supported the entire length of the
shank .  The clearance between the shank and support shall be not greater
than 0.035 inch.  When the dolly is in towing position, the height range
of the lunette shall provide compatibility with pintles in SAE J849 for
doubles trailer except the pintle height shall be 31 through 37 inches
from level ground.  The center of the lunette and the centerline of the
towbar shall be located within 1/8 inch of the longitudinal centerline of
the dolly.  The towbar shall be of the rigid "A" frame type. When coupled
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