TM 10-6640-215-13 4-52. REMOVE/INSTALL JET FUEL THERMAL STABILITY TESTER, JFTOT - continued. e. Connect N2 inlet on right side of unit. f. Install hold down clamps for water inlet and drain to frame. g. Connect plastic hoses to water inlet and drain on right side of unit.  Tighten hose clamp. h. Plug in JFTOT on left side of unit to power transformer. i. Plug JFTOT power cord into wall receptacle. j. Verify proper JFTOT operation. NOTE For component replacement refer to TM 10-6640-210-13&P. 4-53.  REMOVE/INSTALL GAS CYLINDERS AND GAS REGULATOR VALVES. This task covers:   a. Removal b. Installation INITIAL SETUP: Tools Required General Mechanics Tool Kit, (Appendix B, Section III, Item 2) General Safety Instructions WARNING ELECTRICAL SHOCK Pressure systems safety precautions apply to all ranges of pressure. Care must be taken during testing to ensure that all test connections are properly and tightly made prior to applying pressure to the test setup. Ensure  gas  cylinder  valves  are  tightly  closed  prior  to  removing/replacing  gas  cylinders.    Use  care  in moving gas cylinders. REMOVAL Remove Gas Cylinder (Typical).  See figure 4-53. a. Open gas cylinder cabinet door. b. Unlatch appropriate gas cylinder sliding rack retaining lock. 4-140