TRUCK SERVICE MANUAL TM 5-4210-230-14&P-1 BODIES AND CABS 6. Adjust   control   cable(s)   as   outlined   under   "Control Cable Adjustment". 7. Install covers on heater/evaporator unit and instrument panel. 8. Connect battery cable to battery. CONTROL CABLE ADJUSTMENT (Refer to Figure 45) 1. Remove cover from right side of instrument panel. 2. Remove cover from heater/evaporator unit. 3. Set   control   panel   assembly   levers   to   the   extreme right: a. A/C lever at "COLD". b. HTR lever at "HOT" and in detent. c. AIR OUTLET lever at "CAB" and in detent. IMPORTANT These lever positions must be maintained during adjustment. 4. Rotate   cable   adjusters   (expand   cables)   to   obtain mid-travel position of: a. Thermostatic temperature control switch. b. Blend air door. c. Defrost door crank. 5. Rotate cable adjusters (shorten cables) as needed to obtain  the  following  settings  with  cables  free  from binding: a. Thermostatic  temperature  control  switch  at  "COLD" position. b. Blend air door closed about 20 percent compression of door seal and hot water flow control valve in "ON" position. c. Defrost door crank at "CAB" position. 6. Operate control panel levers several times and check to assure that proper adjustment is maintained. If necessary, repeat Steps 3, 4 and 5 to obtain proper adjustment. 7. Install covers on heater/evaporator unit and instrument panel. EVAPORATOR CORE Removal: 1. Raise hood and fender assembly. 2. Discharge  air  conditioning  system  as  outlined  under SERVICE OPERATIONS. 3. Remove cover from right side of instrument panel. 4. Remove cover from heater/evaporator unit. 5. Remove     dash     panel     seal     retainers     and     seals surrounding   evaporator   unit   inlet   and   outlet   tubes (Fig.  46). 6. Disconnect   inlet   and   outlet   hoses   from   evaporator unit inlet and outlet tubes (Fig.  46). Fig. 46  Evaporator Dash Panel Connections 7. Disconnect   low   pressure   switch   wires   from   wiring harness. 8. Remove bolt and nut from clamp securing expansion valve to bracket on blower housing. 9. Remove  air  filter  seal  mounting  strip  and  air  filter from blower housing (Fig. 34). 10. Remove   heater   core   mounting   screws.      (Do   not disconnect hoses from heater core.)  Pull heater core outward  to  disengage  mounting  slot.    Move  heater core down and to the right. CTS-2731  Page 31 PRINTED IN UNITED STATES OF AMERICA