TM 5-5420-278-24&P
0048 00
0048 00-2
LOWER MAIN COUPLING REPLACEMENT (Contd)
REMOVAL
1.
Remove ten screws (4) and washers (5) from inner ponton (3) and access cover (1).
2.
Turn access cover (1) and remove access cover (1) from inner ponton (3).
3.
Remove gasket (2) from front of access cover (1). Discard gasket (2).
4.
Repeat steps 1 through 3 to remove other access covers (1) as necessary.
CAUTION
Do not overheat area around lower main coupling or damage to
aluminum may occur.
NOTE
Heat area around lower main coupling to loosen sealing compound
before removing lower main coupling.
5.
Remove eight nuts (7), washers (6), and bolts (16) from inner ponton (3) and double hinge
coupling (15) or single hinge joint (17).
NOTE
Note location of long screws and thick washers for installation.
6.
Remove twelve nuts (9), two thick washers (10), ten washers (8), eight bolts (13), four bolts (14),
and twelve washers (12) from inner ponton (3), plate (11), and double hinge (15) or single hinge
coupling (17).
NOTE
Assistant will help with step 7.
7.
Remove double or single hinge coupling (15) or (17) from inner ponton (3).
8.
Clean sealing compound from mating surfaces of double or single hinge coupling (15) or (17) and
inner ponton (3).
INSTALLATION
1.
Apply unlike metal compound to mating surface of double or single hinge coupling (15) or (17) and
inner ponton (3).
NOTE
Assistant will help with step 2.
2.
Install double or single hinge coupling (15) or (17) on inner ponton (3).
3.
Install twelve washers (12), four bolts (14), eight bolts (13), ten washers (8), two thick washers (10),
and twelve nuts (9) on double or single hinge coupling (15) or (17), plate (11), and inner ponton (3).
Do not tighten bolts (13) and (14).
4.
Install eight bolts (16), washers (6), and nuts (7) on double or single hinge coupling (15) or (17) and
inner ponton (3). Tighten screws (13), (14), and (16).
5.
Apply adhesive to new gasket (2), and install new gasket (2) on access cover (1).
6.
Position access cover (1) and gasket (2) on inner ponton (3).
7.
Install ten washers (5) and screws (4) on inner ponton (3) and access cover (1).
8.
Pressure test inner ponton (3) for leaks (WP 0059 00), and seal if necessary.
9.
Connect inner pontons (WP 0042 00).
