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TM 10-6640-215-13 4-37.  REMOVE/INSTALL COMPONENTS OF VACUUM SYSTEM -continued. REMOVAL 1. Remove Vacuum Pump.  See figure 4-27. a. Set switch on vacuum pump controller to stop. b. Open circuit breaker A15CB9 on Power Panel No.  2. c. Remove controller box cover, tag motor leads for reconnection and disconnect motor leads. d. Loosen conduit nut at controller box. e. Disconnect discharge line on vacuum pump at discharge valve. f. Loosen hose clamps and disconnect suction hose attached to vacuum pump. g. Loosen hose clamp at disconnect drain line from vacuum pump. h. Remove nuts, lockwashers, flat washers, and bolts that secure foundation of vacuum pump to mechanical room wall foundation. i. Remove vacuum pump with foundation from mechanical room wall foundation. j. Remove conduit from vacuum pump motor. 2. Remove Flow Control Devices.  See Figure 4-25. Remove laboratory stopcock valves by unscrewing valves from tees and elbows located in the vacuum system mounted to the laboratory walls.  See Figure 4-28. 3. Remove System Piping.  See Figure 4-26. a. Remove sections of system piping by locating nearest pipe union and threaded pipe fittings. b. Disconnect union. c. Disconnect pipe nipple from elbow or coupling or valve. d. If damaged section of piping contains brazed joints or union refer to direct support maintenance. 4-88


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