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Table 1-1. Curbing Differences.
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TM-5-5420-205-14 Superstructure Interior Bay Mobile Floating Assault Bridge/Ferry NSN
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Chapter 3 OPERATOR'S MAINTENANCE INSTRUCTIONS - TM-5-5420-205-140021
TM 5-5420-205-14
CHAPTER 2
OPERATING INSTRUCTIONS
Section I. GENERAL
b. Each superstructure is equipped with a
2-1. Superstructure Hydraulic Components
rotation cylinder (para 1-8 b (6)). The cylinders are
a. The superstructure hydraulic components
of double action type with integral hydraulic
consist of end bay unfolding cylinders, curbing
cushioning at each end. These cylinders are
cylinders, rotation assemblies, lines, hoses and
mounted with one end attached to the super-
fittings. These components are actuated through
structure, the other end to the rotation spline, and
the high pressure hydraulic system, supplied and
will rotate the superstructure through a 90 degree
controlled through the transporter of the bridge
angle. When, during construction, it becomes
ferry unit.
necessary to have a reversed direction of rotation of
b. Refer to figure FO-1(1) or (2) for the interior
an end bay (as for example, one interior bay and
bay superstructure hydraulic schematic diagram,
two end bays), this is accomplished as follows: On
and to figure FO-2(1) or (2) for the end bay
the end bay requiring the reversed rotation, per-
superstructure hydraulic schematic diagram.
form steps 4 and 5 of figure 4-13(1); rotate the
spline by manually rotating the rotation cylinder
2-2. Hydraulic Cylinder Operation
about 180 degrees until the eye of the rotation
a. The ramp section of the end bay super-
cylinder is alined with holes of the bracket (fig. 4-13(2)).
structure is operated by two hydraulic cylinders.
Drop in the pin and add washer and cotter
Each cylinder is equipped with a pilot operated
pin removed by steps 4 and 5.
check valve (fig. 4-7), and a counterbalance valve
c. The pinning operation which is required to
(fig. 4-10). The check valves are mounted on the
lock one superstructure to another when forming a
rod end of the cylinders. The counterbalance valves
bridge, requires the use of hydraulic pinning
are mounted on the superstructure I-beam. The
cylinders with necessary control valves. The end
unfolding cylinders, when activated, will fold or
bay has two cylinders and a control valve for the
unfold the ramp section of the end bay, and will
left pinning operation. The interior bay has two
hold the ramp in any desired position to receive or
cylinders on each end. The tubing, hoses and
discharge traffic (fig. 4-15).
control valves, normally used for the right pinning
(1) The end and interior bays are in-
of the interior bay, are also used to actuate the end
terchangeable on the transporters. When the in-
bay ramp (fig. 4-12).
terior bay is removed from a transporter and
d. The raising and lowering of the curb ex-
replaced by an end bay superstructure, the right
tension requires the use of hydraulic curbing
pinning circuit on the vehicle function panel
cylinders, double relief valves, and function
becomes the ramp folding or unfolding circuit. The
selection control valves. The interior bay model
hydraulic circuit on the transporter serving the
2195-1 has two curbs and four cylinders (model
right pinning circuit on the interior bay also serves
2272 has four curbs and four cylinders). The end
as the ramp folding and unfolding circuit on the
bay, model no. 2195-2, has two sections of
end bay, when exchanged.
superstructure and four curbs actuated by eight
(2) A detachable sign plate is provided to
cylinders; model no 2271 is actuated by four
cover the right pinning action on the panel while
cylinders.
being used with the end bay.
Section II. OPERATING INSTRUCTIONS
Operating instructions for superstructure models
and 2272 operation are listed in TM 5-5420-210-12.
2195-1 and 2195-2 are listed in TM 5-5420-204-
12. Instructions for superstructure models 2271
2-1

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