Chevrolet 30 Series 1967 Service Manual page 36

HEATER AND AIR CONDITIONING 1A-8
15. Refill cooling system.
16. Connect battery ground cable.
DEFROSTER DUCT
All Models
The defroster hose and outlet assemblies for all ve­
hicles are illustrated in Figure
CONTROL ASSEMBLY
Deluxe Air Heater
Removal
1. Remove the control assembly retaining screws at
the lower edge of the dash.
2. Lower the unit and remove the blower switch.
3. Remove the cables from the control unit one by one
and mount them in their respective positions on the
replacement unit. Check cable adjustment.
Installation
1. Attach the blower switch and wiring to the control
unit.
2. Place the unit in position in the dash and replace
mounting screws.
C h e v y V an
Removal
1. (Any control) Remove the knob from the control
shaft. Remove retaining nut and escutcheon, and
remove control from the steering column to dash
mounting plate.
2. (HEAT - FAN control) Disconnect the blower wiring
connector from the control.
3. (AIR or DEFROSTER control) Remove the cable from
the air distributor duct and actuating lever.
4. (TEMPERATURE control) Remove the glove box as­
sembly. Remove the cable end retainer from the
temperature door link. Remove the cable case clip
attaching screw, and remove the cable.
Installation
1. Attach the cable to the case and actuating lever.
2. (TEMPERATURE control) Replace the heater assem­
bly and mount it to the firewall. Replace the glove
box assembly.
Fig . 15 - Heater W iring
.
8
3. (AIR - FAN control) Connect the blower wire con­
nector to the control.
4. Install the control to the steering column mounting
plate with the escutcheon and nut. Replace the knob.
5. Check control operation.
Tilt Cab
Removal
1. Remove the screws at the upper edge of the control
unit.
2. Remove the screws which attach the control unit
brace to the lower edge of the dash and lower the
assembly.
3. Remove the blower switch knob and blower switch.
4. Remove cables from the control unit one by one and
mount them in their respective positions on the re­
placement unit. Check cable adjustment.
Installation
1. Attach the blower switch and wiring to the control
unit. P ress the knob onto the switch lever.
2. Place the unit in position in the dash and replace
brace and unit mounting screws.
CONTROL CABLES
Deluxe Air Heater
Remove the control assembly as outlined under CON­
TROL ASSEMBLY and replace the affected cable or
cables. Check cable adjustment before installing control
assembly in dash. Access to the temperature door cable
at the heater is through the plastic seal at the duct
adapter.
Chevy Van
The control cables are complete control units covered
under CONTROL ASSEMBLY.
Tilt Cab
Remove the control assembly as outlined under CON­
TROL ASSEMBLY and replace the affected cable or
cables. When replacing the temperature cable, remove
the glove box assembly to reach the temperature cable
access plate at the top of the core case. Check cable
adjustment before installing control assembly in dash.
F ig . 1 6 - G -1 0 Heater W iring
CHEVROLET TRUCK SERVICE MANUAL