TM 5-5420-203-14
QUADRANT REPLACEMENT (Sheet 2 of 3)
h. Separate bars of hinge (13) for removal of
quadrant (4).
i. Perform steps g. and h. for opposite side of
quadrant (4).
j. Be sure all slack has been taken up by lifting
crane to preclude rolling of quadrant.
k. Remove bridge bolt retainer (14) from bridge
bolt (15). Remove bridge bolt nut (16) from
bolt (15) holding strut (17) to quadrant (4).
Remove bolt (15).
1. Repeat step k. for second strut (17).
m. Using lifting device and sling,
slowly lift quadrant (4), rotate 90 and
remove from bridge and set aside.
INSTALLATION
INSTALL QUADRANT (4).
a. Using a sling (1) and lifting device, lift
quadrant (4) for placing on quadrant hinge
pins (10). Be sure bars of quadrant hinges (13)
are open as shown.
b. Slowly lower quadrant (4) into position.
When quadrant hinges (13) are at the same
level as pins (10), move quadrant forward and
over pins (10).
c. Using wood blocks, chock up underside of
quadrant (3) so it will not roll.
d. Lift up/over bars (13) and mesh with upper
bars (13).
e. Refer to Detail A. Insert quadrant locking pin
(12) through holes in meshed bars of hinge
(13). Insert bridge pin retainer (11) in pin (12).
f. Refer to Detail B. Install quadrant locking pin
(9) in base of quadrant (4) through base of
quadrant, and through quadrant hinge pin (13)
(not shown).
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