TM 5-3810-207-20/TO 36C23-3-37-12 CHAPTER 9 AUXILIARY EQUIPMENT AND MAINTENANCE OF ACCESSORIES USED IN CONNECTION WITH THE CARRIER Section I.  CARRIER WINTERIZATION EQUIPMENT 325.  General The  heater  assembly,  mounted  on  the  exterior  of the   operator's   cab,   furnishes   hot,   fresh   air   into   the operator's   cab   and   to   the   defrosters.      The   heater assembly,  mounted  on  the  carrier  engine  housing,  is similar  to  the  crane  heater  assembly  used  as  a  cold- weather   starting   aid.      The   24-volt   electrical   system furnishes  power  to  both  heaters.    The  fuel  system  is similar  to  the  crane  heater  fuel  system.    The  radiator winter front is used as a cold-weather starting aid.  The two heaters are controlled by switches, thermostats, and control boxes. 326.  Engine Heater a. Removal.      Remove   the   carrier   engine   heater (par.  184). b. Cleaning and Inspection.  Clean and inspect the carrier  engine  heater  in  a  manner  similar  to  the  crane heater (par.  184). c. Illustration.  Install the carrier engine heater in a manner similar to the crane heater (par.  184). 327.  Resistor, Filter, Terminal Block, Igniter, Relay, Limit Switch, Valve, and Microswitch a. Removal.    Remove  the  resistor,  filter,  terminal block, igniter, relay, limit switch, valve, and microswitch (pars.  185 and 186). b. Cleaning and Inspection.  Clean and inspect the carrier   heater   resistor,   filter,   terminal   block,   igniter, relay,  limit  switch,  valve,  and  microswitch  in  the  same manner  as  the  corresponding  parts  in  the  crane  heater (pars.  185 and 186). c. Installation.    Install  the  carrier  heater  resistor, filter,  terminal  block,  igniter,  relay  limit  switch,  valve, and microswitch in the same manner as the corresponding parts in the crane heater (pars.  185 and 186). 328.  Cab Heater a. Removal.  Remove the carrier cab heater in the numerical sequence as instructed on figure 203. b. Cleaning and Inspection. (1) Clean the carrier cab heater and mounting hardware     with     an     approved     cleaning solvent and dry thoroughly. (2) Inspect the heater and mounting hardware for breaks, bends, and other damage. (3) Inspect the heater for proper operation. (4) Replace mounting hardware as necessary. (5) Replace a defective heater as necessary. c. Installation.  Install the carrier cab heater in the reverse   of   the   numerical   sequence   as   illustrated   on figure 203. 329.  Fuel Pump and Filter a. Removal.  Remove the fuel pumps and filters as instructed on figure 204. b. Cleaning and Inspection. (1) Clean all parts with an approved cleaning solvent and dry thoroughly. (2) Inspect all mounting hardware for damage.      Replace   damaged   mounting hardware as necessary. 263