TM9-2320-361-10 2-54. OPERATION OF SLAVE RECEPTACLE KIT To operate slave receptacle kit, refer to para. 2-19. 2-55. OPERATION OF TROOP SEAT AND COVERING KIT To operate, remove, and install troop seats, refer to para. 2-25. To remove and install covering, refer to para. 2-49. 2-56. OPERATION OF TROOP SEAT – CENTER MOUNTED a. General. Troop seat — center mounted kit is installed to double troop transport capacity on cargo trucks (M35A2, M35A2C). b. To operate troop seats (1), refer to para. 2-25. Troop seats (1) are installed on opposite sides of pocket assemblies (2). 2-57. OPERATION OF VAN BODY HEATER (PRIMARY AND SECONDARY) KITS a. General. Van body primary heater kit is installed on M109A3 shop van and M185A3 instrument repair shop trucks to warm van body in temperatures down to -25°F (-32°C). Colder temperatures require addition of van body secondary heater kit. Both heaters have flexible ducts that may be rerouted for spot heating of individual pieces of equipment. b. Operation of Body Heater. NOTE Van body primary and secondary heaters are operated the same way. This procedure covers operation of van body primary heater. (1) Open fuel tank shutoff cock (3) by turning counterclockwise. (2) Supply 115-volt AC power to van if available. Refer to para. 2-28b. If 115-volt AC power is available, place converter selector switch (7) down to 115V position. (3) If 115-volt AC power is not available, place power switch (9) in down position. Place converter selector switch (7) up to 24V position 2-212