Chevrolet 10 Series 1967, Service Manual

Page: 55 / 605

HEATER AND AIR CONDITIONING 1A-27
Fig . 37 - A / C and Heater Hose Routing
ground strap, and connect the motor wire. Connect
cooling tube to motor.
3. (10-30 Series) Remount the hood hinge aligning it
carefully with the scribed lines. Check hood align­
ment.
4. Connect battery ground cable.
EVAPORATOR
Removal
1. Purge the system.
2. Disconnect the line (between the evaporator and the
thermostatic expansion valve) at the expansion valve.
Cap the open connections.
3. Disconnect the evaporator oil bleed line at the P.O.A.
valve. Cap the open connections.
4. Disconnect the evaporator outlet pipe at the P.O.A.
valve. Cap the open connections. Remove the evap­
orator outlet pipe clamp.
5. Detach the expansion valve capillary bulb from the
evaporator outlet pipe.
6
. Disconnect the vacuum lines at the vacuum reservoir.
7. Remove the screws attaching the inboard case half
to the outboard case half, back up plate, and firewall.
8
. Remove inboard case half and evaporator core.
Installation
1. Assemble evaporator core and inboard case half to
the outboard case half. Replace case to case, case
to back up plate, and case to firewall mounting
screws.
2. Attach the vacuum lines to the vacuum reservoir.
3. Mount the expansion valve capillary bulb to the
evaporator core outlet pipe.
4. Connect the evaporator outlet pipe to the P.O.A.
valve using a new "O" ring. Install the pipe clamp.
5. Connect the evaporator oil bleed line to the P.O.A.
valve.
6
. Connect the line from the evaporator to the expansion
valve.
7. If a new evaporator was installed, add three fluid
ounces of refrigerant oil to the system. Evacuate
and charge the system. Check performance.
BLOWER AND EVAPORATOR CASE
Removal
1. Purge the refrigeration system and drain the radi­
ator.
2. Disconnect battery ground cable.
3. Unclip the blower motor wire at the blower flange
terminal.
4. Disconnect heater hoses at the core tubes.
5. Disconnect the refrigerant lines at the P.O.A. valve
outlet and the expansion valve inlet. Cap all open
connections.
CHEVROLET TRUCK SERVICE M ANUAL