Chapter 2 OPERATING INSTRUCTIONS - TM-5-5420-205-140020

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