TM 10-6640-215-13 4-14. REMOVE/INSTALL FUME CHAMBER AND GUM BATH VENT EXHAUST DOOR ASSEMBLY - continued. b. Remove the two latches from door assembly. 2. Repair Clamp Cover.  See figure 4-4. a. Remove screws, nuts, lock washers, and flat washers from clamp cover. b. Remove clamp cover from door assembly. 3. Repair Latch Keepers.  See figure 4-4. a. Remove two screws, lock washers, flat washers, and latch keepers from rivnuts and supports. b. Remove latch keepers. INSTALLATION 1. Install Latches.  See figure 4-4. Install the two replacement latches with two wave washers, flat washers and screws. 2. Install Clamp Covers.  See figure 4-4. Install replacement clamp cover with two screws, flat washers, lock washers, and nuts. 3. Install Latch Keepers.  See figure 4-4. Install replacement latch keepers to vent box with two flat washers, lock washers, and screws. 4. Install Door Assembly.  See figure 4-4. a. Position replacement door assembly, gasket, and vent box into opening of semi-trailer van. b. Align rivet holes and install twenty-one rivets. c. Install four flat washers, lock washers, and screws that secure the two damper frames to vent box. d. Install filter to vent box with four flat washers, lock washers, and screws. 4-31