TM 10-6640-215-13 5-25.  REMOVE/INSTALL GUM BATH VENT/FUME VENT BLOWER AND MOTOR. This task consists of: a. Removal b. Installation INITIAL SET-UP: Tools required General Mechanics Tool Kit, (Appendix B, Section III, Item 2) 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 Gum Bath Vent/Fume Blower and Motor.  See Figure 5-25. a.   At MAIN POWER PANEL, set circuit breaker A1CB2 to OFF. b.   Remove  four  screws  and  access  panel  from  blower  motor.    Tag  for  reconnection  and  disconnect  wiring  and conduit. c.   Loosen clamp and disconnect discharge duct from blower housing. d.   Remove nuts, lockwashers, flat washers, dampers, and bolts securing motor bracket to equipment shelf. e.   Remove blower motor and motor bracket from equipment shelf.  Separate suction duct from blower housing. f. Remove four bolts and separate blower housing from blower motor. g.   Loosen setscrew and remove impeller from motor shaft. h.   Remove four mounting bolts, starwashers, flat washers and lock nuts.  Separate blower motor from motor bracket. INSTALLATION Install Gum Bath Vent/Fume Blower and Motor.  See Figure 5-25. a.   Position blower motor on motor bracket.  Install four mounting bolts, starwashers, flat washers and lock nuts. b.   Install impeller on motor shaft and tighten setscrew. c.   Position blower housing on blower motor and install four bolts. 5-50