TM 9-2320-361-20 12-49. WATER TANK MANHOLE COVER REPLACEMENT (M50A3) This task covers: a. Removal b. Installation INITIAL SETUP: APPLICABLE MODELS M50A3 MATERIALS/PARTS Gasket REFERENCES (TM) TM 9-2320-361-10 TM 9-2320-361-20P EQUIPMENT CONDITION Parking brake set (TM 9-2320-361-10). 1. Remove padlock (2) and clamping ring (1) from manhole cover (5) and tank body (3). 2. Remove manhole cover (5) and gasket (4). Discard gasket (4). 1. Install new gasket (4) on cover (5). Install cover (5) on tank body (3). 2. Place clamping ring (1) around manhole cover (5) and tank body (3). Install padlock (2) on cover (5). 12-80