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Page Title:
Section III. SUPERSTRUCTURE REPAIR |
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 TM 5-5420-205-14
no. 2272. From the junction box the intercom cable is
frayed cable which could cause grounding. Refer to figures
routed (through pipes, clamps, etc.) to a dummy receptacle
at one end of the interior bay superstructure as shown in
components. Install new cable as determined by continuity
check, and reassemble components in reverse order of
figure 8 of TM 5-5420-205-24P.
disassembly. Tighten all connectors securely.
6-6. Cable Assembly Repair
If reception is faulty, inspect for loose RF connection, or a
Section III. SUPERSTRUCTURE REPAIR
superstructure
repairs
will
provide
high-strength
6-7. Superstructures
characteristics equivalent to the original construction.
Like the transporter, the MAB superstructures have been
designed of high-strength materials to make efficient use of
material with a minimum of weight. This design has
6-8. End Bay Superstructure Structural Description
resulted in a composite construction which uses various
a. The end bay superstructure is fabricated of the
high-strength steel and aluminum alloy materials.
materials as listed in table 6-1 below:
Therefore, caution must be exercised to assure that all
Table 6-1. End Bay Superstructure Materials
Recommended
Welding
weld filler
Item description
Material and alloy
repair
material
recommended
(Tapered End Section)
Girders
Aluminum 2014-T6
No
Girders (nose section)
(Aluminum 5456-H-321
Yes
5356
Decking (bolted)
Aluminum 2014-T6
No
Deck plate (welded at nose)
Aluminum 5083-H-112
Yes
5356
Pipe, 6" (at nose)
Aluminum 5456-H-112
Yes
5356
Hinge plates
Steel ASTM A441
Yes
AWS-ASTM
E7000 Series
Curbs
Steel ASTM A441
Yes
AWS-ASTM
E7000 Series
Curb support strut arms
Steel (Ends-ASTM A441)
Yes
AWS-ASTM
E7000 Series
(Tube- ASTM A519)
Yes
AWS-ASTM
E7000 Series
Curb crank arms
Steel (ASTM A237, CL.B)
Yes
AWS-ASTM
E7000 Series
Unfolding cylinder
mounting Steel (ASTM A4411)
Yes
AWS-ASTM
structures
E7000 Series
Yoke assemblies
Steel (ASTM A441)
Yes
AWS-ASTM
E7000 Series
Unfolding link and bars
Steel (ASTM A441)
Yes
AWS-ASTM
E7000 Series
(Short End Section)
Girders
Aluminum 2014-T6
No
No
Decking (bolted)
Aluminum 2014-T6
No
No
Hinge plates
Steel-A441
Yes
AWS-ASTM
E7000 Series
Curbs
Steel-A441
Yes
AWS-ASTM
E7000 Series
Curb support strut arms
(Ends-Steel-ASTM 441)
Yes
AWS-ASTM
E7000 Series
(Tube-Steel-ASTM A519)
Yes
AWS-ASTM
E7000 Series
6-7
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