Kick Panel Air Valve; Plenum Air Valve - Chevrolet 10 1971 Series Chassis Service Manual

Fig. 42— Resistor Unit

KICK PANEL AIR VALVE

Removal (Fig. 43)
1. Disconnect vacuum hose from actuator.
2. Disconnect valve return spring.
3. Remove actuator bracket mounting screws.
4. Remove link retainer at actuator and lift link up out
of actuator. Remove actuator assembly.
5. Remove actuator from bracket.
Installation
1. Attach actuator to bracket.
PLENU M VA LVE
Fig. 4 3 — A ir Inlet V a lv e and Recirculating A ir V alve
K IC K PA D
VA LVE
HEATER AND AIR CONDITIONING 1A-33
V A C U U M A CTUATO R
(AIR INLET VALVE)
EVAPO RATO R
A N D
BLOWER
WATER'
SHUT-OFF
VALVE
'CO M PRESSO R
G R O U N D W IRE
Fig. 44— Electrical and Vacuum Harness-Engine Compartment
2. Install link in actuator and install retainer on link.
3. Mount the bracket to the kick panel.
4. Connect the valve return spring. Connect the vacuum
hose to the actuator.

PLENUM AIR VALVE

Removal (Fig. 43)
1. Remove cowl grille panel. Refer to Section 11.
2. Disconnect the diaphragm link from the connecting
shaft arm.
3. Remove the screw attaching the connecting shaft to
the tube extending forward from the valve.
4. Remove the screws attaching the nylon bearing plate
to the firewall and slide it forward.
5. Pull the rear valve pivot pin forward against spring
tension until it clears the rear bearing.
valve at the rear and withdraw the valve shaft from
the firewall.
Installation
1. Insert the tube shaft on the valve into the firewall
hole and lower the valve into position with the rear
OUTSIDE AIR
D O O R D IA PH R A G M
(D O O R CLO SED WITH (D O O R O P EN WITH
W A T E R V A L V E - V A C U U M APPLIED)
(C L O SE D W ITH
V A C U U M APPLIED)
V A C U U M SOURCE
Fig. 4 5 — Vacuum Diagram
V A C U U M TAN K
TEMPERATURE
CABLE
H ARNESS
Lift the
RECIRCULATED AIR
D O O R D IA PH R A G M
V A C U U M APPLIED)
CO N TR O L HEAD
V A C U U M SW ITCH
10-30 CHEVROLET TRUCK SERVICE MANUAL