TM 10-6640-215-13 4-49.  REMOVE/INSTALL LABORATORY OVENS - continued. INSTALLATION Install Laboratory Oven.  See figure 4-49. a. Using support bracket as template, scribe and drill holes in new oven. b. Install twelve screws that secure brackets to oven. c. Place new oven with support brackets attached on countertop, and attach with twelve screws. d. Plug power cord into convenience outlet and run operational test. NOTE For component replacement refer to TM 10-6640-218-13&P. 4-50.  REMOVE/INSTALL BURN-OUT FURNACE. This task covers: a.  Removal b.  Installation INITIAL SETUP: Tools Required General Mechanics Tool Kit, (Appendix B, Section III, Item 2) Drill, (Appendix B, Section III, Item 1) Drill Set, (Appendix B, Section III, Item 1) General Safety Instructions WARNING ELECTRICAL SHOCK Before  performing  any  maintenance  actions  on  electrical  equipment,  ensure  all  electrical  power has been turned off.  Death or serious injury may occur from failure to do this. REMOVAL Remove Burn-Out Furnace.  See figure 4-50. a. Unplug burn-out furnace power cord from wall receptacle. b. Remove eight screws that secure support brackets to countertop. c. Remove burn-out furnace. d. Remove eight screws attaching brackets to furnace and remove bracket. 4-133