door lock CHEVROLET CAMARO 1967 1.G Chassis Workshop Manual
[x] Cancel search | Manufacturer: CHEVROLET, Model Year: 1967, Model line: CAMARO, Model: CHEVROLET CAMARO 1967 1.GPages: 659, PDF Size: 114.24 MB
Page 3 of 659
SECTION O
INFORMATION AND LUBRICATION
CONTENTS OF THIS SECTION
Page
General Information o-l
Lubrication 0-13
GENERAL INFORMATION
Model Identification and Vehicle Dimensions
Chevrolet
Chevelle
Chevy n
Corvette
Camaro
Page
0-1
0-1
0-2
0-2
0-3
0-3
Page
Unit and Serial Numbers o-3
Engine Number o-3
Vehicle Serial Number 0r3
Keys and Locks 0-4
Pushing,Towing and Lifting 0-7
Series
Biscayne
Bel Air
Tmpala.
Impala
Super Sport
Caprice
MODEL IDENTIFICATION-CHEVROLET
Model Number
6-Cyl
15311
15369
15335
15511,
15569
15535
15545
16387
16367
16369
16339
16335
16345
16787
16767
—
—
—
—
V-8
15411
15469
15435
15611
15669
15635
15645
16487
16467
16469
16439
16435
16445
16887
16867
16647
16639
16635
16645
Description
2-Door Sedan, 6-Passenger
4-Door Sedan, 6-Passenger
4-Door Station Wagon, 2-Seat
2-Door Sedan, 6-Passenger
4-Door Sedan, 6-Passenger
4-Door Station Wagon, 2-Seat
4-Door Station Wagon, 3-Seat
2-Door Sport Coupe, 5-Passenger
2-Door Convertible, 5-Passenger
4-Door Sedan, 6-Passenger
4-Door Sport Sedan, 6-Passenger
4-Door Station Wagon, 2-Seat
4-Door Station Wagon, 3-Seat
2-Door Sport Coupe, 4-Passenger
2-Door Convertible, 4-Passenger
2-Door Custom Coupe, 5-Passenger*
4-Door Custpm Sedan, 6-Passenger
4-Door Custom Wagon, 2-Seat
4-Door Custom Wagon, 3-Seat
*4-Passenger when optional bucket front seats are specified.
VEHICLE DIMENSIONS-CHEVROLET
Pertinent dimensions for the different models are shown in the following chart.
Model
Length Overall . .
Width Overall (Body)
Height Overall
Wheelbase
Tread-Front
Tread-Rear
Curb Weight: Approximately 3543 lbs.
Sedan
213.2"
79.6"
55.4"
119.0"
62.5"
62.4"
4-Door Sedan with
2-Door
Sport Coupe
213.2"
79.6"
54.4"
119.0"
62.5"
62.4"
L-6 Engine; 3685 lbs
Convertible
Coupe
213.2"
79.6"
55.3"
119.0"
62.5"
62.4"
. with V-8 Engine.
Station
Wagon
212.4"
79.6"
56.7"
119.0"
63.5"
63.4"
CHEVROLET CHASSIS SERVICE MANUAL
Page 6 of 659
GENERAL INFORMATION 0-4
Fig.
1—Vehicle
Serial Number
Located on Left Front Hinge
Pillar—Chevrolet Shown
Fig.
2—Vehicle Serial Number and
Body Style, Body Number Trim and
Paint Combination Located on
Instrument Panel Brace
Under Glove Box—Corvette
Fig. 3—Four and Six Cylinder
Engine Unit Number Located on
Pad at Right Hand Side of Cylinder
Block at Rear of Distributor
Fig.
4—Eight Cylinder Engine Unit
Number Located on Pad at Front,
Right Hand Side of Cylinder Block
Fig.
5—Rear Axle Unit Number
Located Bottom Surface of Carrier
at Cover Mounting Flange—Corvette
Fig.
6—Rear Axle Unit Number
Located on Right or Left Axle
Tube Adjacent to Carrier
BSHfi^;^
PAINT
HRIKI5"tM>
fIHIsS
HE|St.>MfT*
^^ * *•'"
•<"'
Fig.
7—Body Style, Body Number
Trim Type and Paint Combination
Located on Upper Right Hand Side
of the Dash Panel—Chevrol et
Fig.
8—Body Style, Body Number
Trim Type and Paint Combination
Located on the Upper Left Hand
Side of the Dash Panel—Chevelle
and Camaro
Fig.
9—Body Style, Body Number
Trim Type and Paint Combination
Located on the Upper Right Hand
Part of the Dash Panel—Chevy II
1. Manufacturers identity number assigned to all
Chevrolet built vehicles.
2.
See Model Identification in this section.
3.
Last number of model year (1967).
4.
F-Flint
5.
Unit numbering will start at 100,001 at all plants.
KEYS AND LOCKS
Four keys (two hexagonal head and two round head) are
provided with each vehicle. The hexagonal-head key
operates the ignition switch and front door locks. The
round-head key operates the locks for the glove box and
rear compartment lid.
' Lock cylinders (except trunk) are furnished for service
uncoded, this necessitates the coding of these replace-
ment lock cylinders.
NOTE: In service, the trunk and glove box
lock cylinders are provided together with the
trunk lock cylinder coded and the glove box
cylinder uncoded.
The side bar type lock (fig. 18) is used for the ignition,
front doors and trunk. The glove box lock is of the wafer
CHEVROLET CHASSIS SERVICE MANUAL
Page 8 of 659
GENERAL INFORMATION
0-6
Once the code number of the lock is obtained look up
this number in a key cutting book.
All side bar locks (except trunk) furnished to the field
by the Parts' Department are uncoded, that is, they are
furnished without tumblers, springs or spring retainers,
these parts are serviced separately. The tumblers come
in five different depths, indicated by numbers.
The side bar locks have six tumbler positions, and in
looking up the cutting code, the following may be used as
an example. After key code number is determined, either
from key or from number stamped on lock cylinder refer
to your code book and record the key cutting information
as follows:
Key of Lock
Code Number
0V11
Cutting or Tumbler
position from head
of lock
Key Cutting
Code Numerical
545431
123456
NOTE:
Key blanks used for ignition and door
locks are stamped with an "A" while rear com-
partment and glove box blanks are stamped with
a "B".
The number that is written above the cutting or tumbler
position indicates each different tumbler which is to be
dropped into each tumbier slot of the lock.
In cases where a code book is not available, the dia-
gram shown on Figure 19 may be used to determine the
tumblers required to assemble an uncoded lock cylinder.
1.
Lay the key on the diagram (fig. 19) with bottom of
key flush with edge of the drawing, head and point
carefully lined up.
2.
Read the code in numbers 12345 from the head of the
key to the end from positions 1 to 6 inclusive. As
each depth is determined write that number in the
blank space provided above the position numbers
(1-2-3-4-5-6).
3.
With key properly lined up on diagram, all cuts that
show in the first section are marked
"1"
J
4.
Cuts that fall in the first black section, mark "2".
5. Cuts that fall in the first white section, mark "3".
6. Cuts that fall in second black section, mark "4".
7. Cuts that fall in the second white section, mark "5".
After the numbers have been determined and written
above the cutting positions the lock cylinder should be
assembled as follows.
Lock Cylinder Assembly—Refer to Figure 20
1.
Hold cylinder with head of cylinder away and starting
•... at the head of the cylinder, insert the tumblers in
their proper slots in the order called for by the
code, ribbed side toward you and long point down.
2.
After all tumblers are in place, check for correct-
ness with the code. Then press tumblers down with
one finger.
3.
Insert one tumbler spring in the space provided
above each tumbler.
CAUTION: If the springs are tangled, do not
pull them apart—unscrew them.
4.
Reverse the lock cylinder so that the head of the
cylinder is now toward you. Insert the spring re-
tainer so that one of its six prongs enters into each
of the springs and the two large end prongs slide into
the slots at either end of the cylinder. Press the
retainer down with one finger.
5. To check, insert proper key and if tumblers are in-
stalled properly the side bar will be allowed to drop
down. If bar does not drop down, remove the key,
spring retainer, springs and tumblers and reas-
semble correctly.
NOTE:
If the tumblers have not been assembled
correctly and not according to the code, the
tumblers can be removed from the cylinder by
holding it with the tumbler slots down, pulling
the side bar out with the fingers and jarring the
cylinder to shake the tumblers out. This pro-
cedure is necessary because after the tumblers
have been pressed down into the cylinder they
are held in their slots by the cross bar.
6. If after checking it is found that the lock is as-
sembled properly, remove key and place cylinder in
INSERTING
TUMBLER
CHECKING
WITH CODE
STAKING
POINTS
NSERTING
TUMBLER SPRINGS
INSERTING
SPRING RETAINER
Fig.
19—Tumbler Requirement Diagram
Fig.
20—Assembling Lock Cylinder
CHEVROLET CHASSIS SERVICE MANUAL
Page 23 of 659
LUBRICATION
0-21
6
3-SPEED
4-SPEED
AUTOMATIC
10
LUBRICATE EVERY 6,000 MILES GL -Multi-purpose
or
Universal Gear Lubrincant*
-(V LUBRICATE EVERY 12,000 MILES WB-Wheel Bearing Lubricant
V/^ (Whenever Brakes
are
serviced)
AT —Automatic Transmission Fluid (Type)
BF -Brake Fluid
a
LUBRICATE EVERY 36,000 MILES
* Refill Positraction Rear Axle with
Special Lubricant Only.
CL -Chassis Lubricant
EO—Engine
Oil
Fig.
36—Lubrication Diagram—Corvette
1.
Front Suspension
2.
Steering Linkage
3. Steering Gear
4.
Air
Cleaner
5. Front Wheel
Bearings
6. Transmission
7. Rear Axle
8.
Oil
Filter
9. Battery
10.
Parking Brake
11.
Brake Master Cylinder
BODY LUBRICATION POINTS (CORVETTE)
Lubricate the following items when possible.
Hood Latch Mechanism and Hinges --Apply light engine oil
to pivot points. Don't oil lock pins or catch plates.
i
Rear Compartment Lid Release and Hinges --Apply light
engine
oil.
Side Door Hinge Pins—Apply light engine oil.
Door Lock Rotor and Striker Plate—Apply light engine oil or
stainless stick lubricant.
Lock Cylinders—Lubricate with powdered graphite.
Window Regulators and Controls and Door Lock Remote
Link —Apply light engine
oil.
Gas Tank Filler Cap Hinge—Apply light engine oil.
Weatherstrips and Rubber Bumpers —Coat lightly with
a
rubber lubricant.
CHEVROLET CHASSIS SERVICE MANUAL
Page 24 of 659
SECTION
1A
HEATER
AND AIR
CONDITIONING
CONTENTS
OF
THIS SECTION
Heater
Air Conditioning
Page
1A-1
1A-13
HEATER
GENERAL DESCRIPTION
CHEVROLET, CHEVELLE,
AND
CAMARO
Components
of the
Chevrolet, Chevelle,
and
Camero
heaters
are
attached
to the
firewall
on the
right side
of
the vehicle. The blower
and air
inlet assembly and water
hoses
are
located on the engine side
of
the firewall while
the heater core and distributor duct
are on the
passenger
side.
The heater operates
on
outside
air
only with
the
blower receiving
its
airflow from
the
cowl vent plenum
chamber.
Since
the
unit
has no
water valve, water circulation
keeps
the
core
hot at all
times.
Air
passing through
the
core receives maximum heat from
the
core.
In operation, three levers control
all
heater opera-
tions.
The
AIR-FAN lever
is a
combination control;
moving
the
lever half-way opens
the
AIR door
(by
means
of
a
bowden cable)
to
supply outside
air to the
three
speed blower. Further movement
of the
lever operates
the blower.
The
other levers depend on bowden cables
to
operate
the
diverter doors located
in the
distributor
duct
to
control heater output and operation.
At
the
heart
of
the heater operation
is the
temperature
door.
Air
from
the
blower follows parallel paths through
the distributor duct, with
one
path passing through
the
heater core
and the
other path bypassing
the
core.
The
temperature door, operated
by the
TEMPERATURE
con-
trol lever,
is
placed
in the
duct
so
that when
it
closes
off
the path from
the
heater core,
it
allows ambient airflow
through
the
unheated path.
In the
opposite position only
heated airflow
is
allowed. Final heater output tempera-
ture
is
dependent upon
the
proportion
of
heated
and
unheated
air
blended together according
to the
setting
of
this temperature door.
To
insure positive closing
of
this
door when
the
heat lever
is in the off
position,
a cam
lock device
is
utilized
in the
control linkage
of the
Chevelle heater only.
Just beyond
the
temperature damper door
is the Air
door, operated
by the
AIR-FAN control lever, which
is
the
air
on-or-off control. This door will
be
open when-
ever
the
heater blower
is in
operation.
The defroster door, operated
by the
DEFROSTER
lever, acts
to
divert
the
heated
air
flow
up
through
the
defroster ducts
for
de-fogging, defrosting
or
de-icing
operations.
Figures
1 and 2
illustrate airflow through
the
heater.
BLOWER
DEFROSTER
OUTLET
DASH
PANEL
OUTSIDE
AIR
FROM
COWL PLENUM DUCT
HEATER
OUTLET
DOOR
DOOR
Fig.
1
— Heater
Air
Flow (Chevrolet, Chevelle, Corvette, Camaro)
CHEVROLET CHASSIS SERVICE MANUAL
Page 25 of 659
HEATER AND AIR CONDITIONING 1A-2
DEFROSTER-q
DOOR
v-
HEATER
OUTLET
DEFROSTER
OUTSIDE
AIR
FROM PLENUM
OUTLETS
""•—
,
BLOWER
« 1
/ y
r J
\
AIR
DUQ
•*-——
DOOR
—-**
X J
HEAT
DOOR
HEATER
CORE
Fig. 2-Heater Schematic (Chevy 11)
CHEVY
II
Heater components are located under the instrument
panel in the passenger compartment. Hot water hoses
from the engine are routed to the fire wall to the heater
core pipes. The blower motor receives outside air from
the cowl vent plenum chamber through the adapter as-
sembly. The air enters the heater core chamber where
it either bypasses or passes through the core depending
on the position of the temperature door, controlled by
the TEMPERATURE lever on the instrument panel.
Temperature control is achieved by adjusting the position
of this door to vary the proportion of heated and unheated
air introduced to the car interior. As the air flow is
drawn out of the heater core chamber (in the desired
proportion of hot and cold), it enters the blower where
it is thoroughly mixed, assuring a uniform temperature.
The distributor guides the air flow through either the
floor outlet or the defroster outlets depending on the
setting of the DEFROSTER lever on the instrument
panel. The AIR-FAN lever is the air OFF control as
well as the blower control.
CONTROLS
Control Assembly (Chevrolet, Chevelle, Camaro,
and Chevy II)
Air-Fan Lever
Since the heater makes use of outside air only, this
lever serves as an "air on or off" control by actuating
a damper in the distributor assembly downstream ("up-
stream" in the Chevy n heater) from the blower assem-
bly. With the lever in the half-way position, this damper
will be open to allow airflow into the vehicle. Moving the
lever further will actuate the three-speed (LOW-MED-
HIGH) fan lever which controls the blower motor and
determines the volume and force of the air flowing
through the heater core into the car.
Temperature Lever
Through its bowden cable, this lever controls the
positioning of the temperature door in the distributor
duct. This door allows airflow through either the heater
core (full RIGHT) or the bypass duct around the heater
core (full LEFT). Because the water temperature is con-
stant, this knob acts as an air mixture control, control-
ling temperature by varying the proportions of heated
and unheated air blended in the heater distributor duct.
The cam lock device at the damper door operating
lever (Chevelle only) may be adjusted as follows: Loosen
the two attaching screws. Place the cam in the closed
position and insert a pin through holes provided, locking
the cam in this position. Rotate the entire assembly
toward the closed position. Hold closed with some force
and tighten attaching screws. Remove the locking pin.
Defrost Lever
The defrost lever controls the position of the damper
(or deflector) door located in the heater and defroster
assembly. In the "off" position full airflow will go to
the floor duct for car heating purposes. In the "de-ice"
position the diverter door will drop down and divert
almost all the airflow to the defroster duct. (This posi-
tion will seldom be needed except for extreme de-icing
requirements). A "detent" position is built into the
Fig. 3—Heater Control Panel (Chevrolet Shown as Typical)
CHEVROLET CHASSIS SERVICE MANUAL
Page 26 of 659
HEATER AND AIR CONDITIONING 1A-3
linkage of this lever which will provide partial airflow
only to the defroster duct and which should be used for,
all normal defogging operations.
CORVETTE
Heater components are attached to the dash panel on
the right side of the vehicle with the air inlet assembly
on the engine side and the heater and air distributor
assemblies beneath the instrument panel within the pas-
senger compartment.
The heater operates on outside air only with the blower
receiving its air flow from the cowl vent plenum
chamber.
No water valve is utilized in the system. Therefore,
water flows through the heater core constantly while
the engine is running, keeping the core at maximum
temperature at all times.
Airflow through the system is shown in Figure 1.
Controls
Two knobs control all heater operations:
The FAN-TEMP knob is rotated to turn the blower
on and off and control blower speed and is pulled out
as desired to regulate heater temperature.
The AIR-DEF knob is the air on-and-off control as
well as the defroster control.
Temperature Damper: Door
At the heart of the heater operation is the temperature
damper door. Air from the blower follows parallel paths
through the distributor duct, with one path passing
through the heater core and the other path bypassing the
core.
The temperature damper door is placed in the duct
so that, when closed, the path of the heated air leaving
the heater core is blocked while the ambient air path
remains open. Positive closing of this door when no
heat is being called for is assured by a cam assembly
at the door operating lever. As the FAN-TEMP knob
is pulled out, the damper door is opened accordingly,
allowing varying proportions of heated air to mix with
the unheated airflow, thus providing heater outlet tem-
perature control. With the knob pulled fully out the
Fig.
4—Heater Controls (Corvette)
ambient air path is blocked and all airflow passes
through the heater core. Final heater output temperature
is dependent upon the proportion of heated and ambient
air blended together according* to the setting of the
temperature damper door.
Air and Defrost Damper Doors
Beyond the temperature damper door are the air door
and the defroster door, both operated through a single
bowden cable by the AIR-DEF knob. The first half of the
travel of this knob opens the AIR door allowing the
airflow to pass into the interior of the car through the
floor distributor openings. Pulling the AIR-DEF knob
fully out causes the defroster door to open, diverting
this airflow to the defroster ducts for defogging, de-
frosting or deicing operations.
NOTE: Since this knob is the air on-or-off
control, it should be pulled at least halfway out
before turning on the blower.
Fan Control
Rotate the FAN-TEMP knob to operate the three-
speed blower, increasing the velocity of the air through
the heater. The fully counter-clockwise position of the
knob is the off position. Turn clockwise to the desired
blower speed; fully clockwise for high blower speed.
COMPONENT REPLACEMENT AND REPAIR
CHEVROLET, CHEVELLE, AND CAMARO
Blower Assembly
Removal
1.
Disconnect battery ground cable.
2.
Unclip heater hoses from fender skirt.
3.
(Chevrolet and Camaro) Remove right front fender
and skirt assembly. (See Section 11 of the Service
Shop Manual)
(Chevelle) Move the vehicle front wheels to the
extreme right turn position. Remove all right front
fender retaining bolts. Allow the skirt to drop and
rest on top of the tire. To gain maximum clearance
for access to the blower motor attaching screws, a
block of wood may be wedged between the fender
lower flange and the top of the fender skirt. Position
the wood block so that the rear portion of the skirt
will be forced down and inboard. (See Figure 7.)
4.
Disconnect the blower motor wire at the motor
flange.
5.
Remove the motor to case mounting screws and re-
move motor. Pry the flange gently if the sealer acts
as an adhesive.
6. Remove the blower wheel retaining nut and separate
blower and motor.
Installation
1.
Assemble the blower wheel to the motor with the
open end of the blower away from the motor.
2.
Place the assembly into the case and replace the
mounting screws. Connect the blower motor wire to
the motor.
3.
(Chevrolet and Camaro) Replace the fender and
skirt assembly.
(Chevelle) Replace the fender skirt.
4.
Clip the heater hoses to the fender skirt and connect
the battery ground cable.
CHEVROLET CHASSIS SERVICE MANUAL
Page 44 of 659
HEATER AND AIR CONDITIONING 1A-21
"De-Fog"
Position
In the event that the front windshield should require
removal of a fogging condition, the owner at his option
may direct air to the windshield. The "De-Fog" position
directs part of the air to the windshield while retaining a
certain amount through the floor outlets. The temper-
ature of the air remains the same as it was prior to the
control being placed in the "De-Fog" position. Five
blower speeds are available. The temperature of the air
and the blower speed are selected by the automatic
controls and are dependent upon the in-car temperature.
"De-Ice" Position
The "De-Ice" position provides full heat with "Hi"
blower directing the entire airflow to the windshield to
melt ice. The automatic controls are completely defeated
and as a result, full heat with "Hi" blower are the only
conditions that can be received. The system will turn on
immediately in this position even though the engine
coolant might be cold.
General Information
Three start up conditions can be achieved with
Comfortron.
Weather
Cold
Method of Starting System
System starts as soon as engine coolant is
hot.
Hot System starts immediately when AC is
required.
Any System starts immediately in "De-Ice"
position.
UNIVERSAL SYSTEM
A self-contained unit, the dealer installed Universal
System operates on recirculated air only and entirely
independent of the vehicle heater. Recirculated inside air
is drawn into the unit, passed through the evaporator core
and into the car through the adjustable outlets in the
evaporator case. The entire unit mounts compactly
beneath the dash. Temperature control is by means of a
thermostatic switch.
The compressor used with the Universal System is
identical to that used for the Four-Season system except
for displacement. Underhood components are similar in
placement to the Four-Season system.
Controls
Universal system controls are the AIR knob controlling
the three speed blower motor switch and the TEMP knob
which controls the setting of the thermostatic switchi
Switch adjustment is covered elsewhere in this section.
When operating this system the Heater must be fully off.
CHEVY II ALL-WEATHER SYSTEM
The Chevy n All-Weather Air Conditioning System,
Figure 33, operates in conjunction with the heater to
provide a complete air conditioning system operating on
either outside air, recirculated air or a combination of
both. The cooling unit attaches to the heater distributor
and utilizes the heater blower. Several controls allow
full use of either the heating or cooling features of the
system. During marginal weather, it is possible to pro-
vide heated air at floor level and cooled air at breath
level.
A schematic view of the air conditioning underdash
components is provided in Figure 34 to aid in under-
standing airflow and control operation.
The evaporator assembly, located in the passenger
compartment attached directly to the heater distributor,
contains the evaporator core, expansion valve, thermo-
static switch and the air conditioning "ON" knob. The
thermostatic switch, utilized as the cooling control, feels
the temperature of the cooled air leaving the evaporator
core and turns the compressor on and off in accordance
with cooling needs. Refrigerant lines connect the evap-
orator assembly to the other system components located
in the engine compartment.
The six cylinder air conditioning compressor, com-
pletely field serviceable, is bracket-mounted to the
engine and is belt driven from the crankshaft pulley. A
muffler assembly, designed to eliminate compressor
pulsations is an integral part of the compressor con-
nector block. The condenser is mounted on the radiator
support just ahead of the engine radiator. The receiver-
dehydrator, with its sight glass, is located on the right
fender skirt.
Controls
Control of the air conditioning system is achieved
through the use of the heater control on the instrument
panel as well as the two knobs located on the air condi-
tioning unit itself (fig. 35).
Air Conditioning "ON" Knob
Labeled "Pull for Air Cond.", this knob diverts air-
flow from the floor distributor and through the air condi-
tioning unit. Initial movement of this knob also actuates a
switch, located at the damper door, which energizes the
compressor clutch thus putting the system into operation
and under the control of the thermostatic switch.
Temp-Cool Knob
This knob controls the thermostatic switch. Turn the
knob clockwise for more cooling, counter-clockwise for
less cooling.
Air Lever
This lever actuates the damper within the assembly
which chooses between recirculated air or outside air.
Fig.
31-Universal Air Conditioning Unit
CHEVROLET CHASSIS SERVICE MANUAL
Page 47 of 659
HEATER AND AIR. CONDITIONING 1A-24
Fig. 35-Controls-AII Weather (Chevy II)
The heater components of the system are similar to
the standard Corvette heater with hoses routing engine
coolant to and from the heater core. A vacuum operated
shutoff valve assures that no coolant will pass through
the heater core until the system calls for heat.
Four control knobs surrounding the clock on the in-
strument panel center console provide full control of the
heating and cooling functions of the air conditioning
system.
The general arrangement of the system components
is pictured in Figure 37 while a schematic view of the
system will be found in Figure 36.
Controls Corvette
Four control knobs, grouped around the clock on the
instrument panel central console, provide full control
of the heating and cooling functions of the Corvette Air
Conditioning System. Each of the knobs, through a bowden
cable, operates one of the air diverter doors in the air
distributor assembly. In addition, the AIR COND.-PULL
knob operates the compressor switch; blower speeds are
controlled by turning the AIR PULL knob; and the heater
hot water valve vacuum switch is actuated by the COOL
IN-HQT PULL knob.
Air Conditioning "ON" Knob
The "AIR COND. PULL" knob controls the positioning
of the air diverter door which routes conditioned air
through either the dash diffuser ducts or the floor dis-
tributor outlets. Movement of this knob (hence, movement
of the selector door) also controls' the compressor
switch. When the door is positioned to send air through
the dash outlets the compressor is automatically turned
on to place the cooling system in operation and the fan
is turned on to LOW speed.
Blower Switch and Air Selector
The AIR PULL-FAN knob operates the selector door
in the right hand plenum chamber and may be set to allow
full outside air, full inside air, or a mixture of the two to
DEFROSTER DOOR
OPERATED BY
DEFROSTER KNOB
AIR CONDITIONING DOOR
OPERATED BY
AIR COND. PULL KNOB
BLOWER
OPERATED
BY TURNING
AIR KNOB
AIR DOOR
OPERATED
BY PULLING
AIR KNOB
OUTSIDE
AIR
CONTROLS
HEAT DOOR
OPERATED BY
COOL IN-HOT PULL
KNOB
L.H. OUTLET
CENTER
OUTLET
R.H. OUTLET
AIR COND.
PULL
COOL IN
HOT PULL
AIR PULL
LO-MED-HI
DEFROSTER
PULL
Fig.
36—Corvette Four-Season System Schematic
CHEVROLET CHASSIS SERVICE MANUAL
Page 49 of 659
HEATER AND AIR CONDITIONING 1A-26
clockwise for medium and high blower speed, as
desired. Low blower speed is automatic during
cooling operations.
4.
"Def-Pull". This knob should be pushed fully in.
Additional Cooling Hints
1.
The center barrel outlet in the dash may be rotated
to deflect air as desired or used to act as a shut off
door.
2.
The right and left ball outlets may be rotated to
deflect air in the direction desired. Each outlet has
a shut off valve operated by a knob approximately
4 in. inboard. When the knob is horizontal, the valve
is open.
3.
There are two (2) additional outlets in the bottom of
the ducts approximately 6" inboard from the valve
knobs. A rotating cover will open these outlets to
provide cool air for the feet if desired.
4.
When first entering a very warm car, open the
windows for a few minutes until the interior of the
car has cooled off.
Heating
1.
"Air Pull-Fan". Pull this knob fully out. Rotate
the knob clockwise for low, medium or high blower
speed as desired. If just a small amount of heat is
desired, leave the fan on low or medium speed and
regulate the temperature with the "Cool In-Hot Pull"
knob.
2.
"Air Cond-Pull". This knob should normally be
pushed fully in. However, during cool, damp days
it is possible, by pulling this knob fully out, to de-
humidify the air by passing it through the evaporator
core before reheating to the desired outlet
temperature.
3.
"Cool In-Hot Pull". Pull this knob out as far as
necessary to provide the temperature desired.
4.
"Def-Pull". Pull this knob all the way out for
maximum defrosting or de-icing. When the knob is
partly out, a portion of the hot air is used for de-
frosting and the balance is discharged through the
heater outlet.
GENERAL INFORMATION
In any vocation or trade, there are established proce-
dures and practices that have been developed after many
years of experience. In addition, occupational hazards
may be present that require the observation of certain
precautions or use of special tools and equipment. Ob-
serving the procedures, practices and precautions of
servicing refrigeration equipment will greatly reduce the
possibilities of damage to the customers' equipment as
well as virtually eliminate the element of hazard to the
serviceman.
PRECAUTIONS IN HANDLING REFRIGERANT-12
Refrigerant-12 is transparent and colorless in both the
gaseous and liquid state. It has a boiling point of 21.7^
below zero and, therefore, at all normal temperatures
and pressures it will be a vapor. The vapor is heavier
than air and is noninflammable, nonexplosive, non-
poisonous (except when in contact with an open flame)
and noncorrosive (except when in contact with water).
The following precautions in handling R-12 should be
observed at all times.
• All refrigerant drums are shipped with a heavy metal
screw cap. The purpose of the cap is to protect the
valve and safety plug from damage. It is good .prac-
tice to replace the cap after each use of the drum.
• If it is ever necessary to transport or carry a drum
or can of refrigerant in a car, keep it in the luggage
compartment. Refrigerant should not be exposed to
the radiant heat from the sun for the resulting in-
crease in pressure may cause the safety plug to
release or the drum or can to burst..
• Drums or disposable cans should never be subjected
to high temperature when adding refrigerant to the
system. In most instances, heating the drum or can
is required to raise the pressure in the container
higher than the pressure in the system during the
operation. It would be unwise to place the drum on a
gas stove, radiator or use a blow torch while pre-
paring for the charging operation, for a serious ac-
cident can result. Don't depend on the safety
plug - many drums have burst when the safety plug
failed.' Remember, high pressure means that great
forces are being exerted against the walls of the
container. A bucket of warm water, not over 125°F,
or warm wet rags around the container is all the heat
that is required.
• Do not weld or steam clean on or near the system.
Welding or steam cleaning can result in a dangerous
pressure buildup in the system.
• When filling a small drum from a large one, never
fill the drum completely. Space should always be
allowed above the liquid for expansion. If the drum
were completely full and the temperature was in-
creased, hydraulic pressure with its tremendous
force would result.
• Discharging large quantities of R-12 into a room can
usually be done safely as the vapor would produce
no ill effects, however, in the event of an accidental
rapid discharge of the system it is recommended
that inhalation of large quantities of R-12 be avoided.
This caution is especially important if the area con-
tains a flame producing device such as a gas heater.
While R-12 normally is nonpoisonous, heavy con-
centrations.. of it in contact with a live flame will
produce a toxic gas. The same gas will also attack
all bright metal surfaces.
• Protection of the eyes is of vital importance! When
working around a refrigerating system, an accident
may cause liquid refrigerant to hit the face. If the
eyes are protected with goggles or glasses, no
serious damage can result. Just remember, any
R-12 liquid that you can touch or that touches you is
at least 21.7"F. below zero. The eyeballs can't take
much of this temperature. If R-12 liquid should
strike the eyeballs, here is what to do:
1.
Keep calm.
2.
Do not rub the eyes! Splash the affected area with
quantities of cold water to gradually get the tem-
perature above the freezing point. The use of min-
eral, cod liver or an antiseptic oil is important in
CHEVROLET CHASSIS SERVICE MANUAL