REMOVAL - TM-5-5420-278-24P

LOWER MAIN COUPLING REPLACEMENT REMOVAL, INSTALLATION

TM-5-5420-278-24P Common Bridge Transporter (CBT) M1977 and Bridge Adapter Pallet (BAP) M15 Manual
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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).

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