Section IX. MAINTENANCE OF SUPERSTRUCTURE BRIDGE LAUNCHING
AND RETRIEVING EQUIPMENT
Care must be exercised when installing quick
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.