Section IX. MAINTENANCE OF SUPERSTRUCTURE BRIDGE LAUNCHING AND RETRIEVING EQUIPMENT

TM 5-5420-205-14

Section IX. MAINTENANCE OF SUPERSTRUCTURE BRIDGE LAUNCHING

AND RETRIEVING EQUIPMENT

Care must be exercised when installing quick

4-26. General

disconnect couplings that a good seat of the balls of the

female fitting is made in the groove of the male fitting on

The interior bay superstructure consists of the

the transporter deck. To check that a good connection

frame structure, decking, curbing, rotation spline, pinning,

has been made:

curb and rotation cylinders.

(1) Operate the pinning, curbing, rotation,

The end bay superstructure consists of the

and folding cylinders and observe whether the related

frame structure, yoke, decking, curbing, rotation spline,

hydraulic hose stiffens noticeably. If the hose does stiffen

rotation cylinder, curb cylinders, ramp unfolding cylinders

(indicating a pressure build-up, relieve the pressure from

and cylinder mounting brackets.

the hose, grasp the sleeve of the female coupling and lift

it upward and off the male coupling.

The interior bay and end bay superstructure

are similar in construction. They are fabricated from

(2) Observe both female and male

aluminum alloy and steel, welded or riveted together to

coupling halves for defective O-rings, defective ball

form a frame to which the decking is bolted. The deck

retainer, or missing balls.

plates are ribbed aluminum alloy extrusions with non-skid

top surface. The hydraulic cylinder mounting brackets are

(3) Reinstall the female coupling on the

fabricated from plate or bar steel. The brackets for the

male coupling and again operate the cylinder. If the hose

end bay unfolding cylinders are attached to the frame with

stiffens, release pressure and install a new female

bolts. The curb and rotating cylinder brackets are welded

coupling on the hose.

to the 'frame. The pinning cylinders are bolted to the

frame. The yoke and linkage is a forged steel weldment.

(4) Operate the cylinder to see if the new

female coupling eliminates the trouble. If it does not,

4-27. Quick Disconnect Couplings, Replacement

install a new male coupling and test. If this does not

eliminate the trouble, notify direct support maintenance.

Refer to figure 4-19(1) and (2) for removal

and installation of hydraulic quick disconnect couplings.

4-24