bulb 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 64 of 659
HEATER
AND AIR
CONDITIONING
1A-41
OUTLET
1
TO EXPANSION
^
VALVE
TO
OIL
BLEED LINE
^ INLET
Fig.
51—Evaporator Pressure Control Valve—POA
turn increments until
the
suction pressure rises
to
the correct pressure.
5.
If the
pressure
is
more than
it
should
be,
turn the
adjusting screw counter-clockwise until
the
proper
pressure
is
reached.
6. After adjusting
the
switch, install the capillary to
its
normal position
and
observe
the
operation
of the
system
for
several minutes. Then
if
the operation
is
satisfactory remove the gauge
set,
replace the switch
and reinstall the face plate onto the evaporator case.
EXPANSION VALVE
A malfunction
of the
expansion valve will
be
caused
by
one of the
following conditions: valve stuck open,
valve stuck closed, broken power element,
a
restricted
screen
or an
improperly located
or
installed power
element bulb.
The
first three conditions require valve
replacement.
The
last two may be corrected by replacing
the valve inlet screen
and by
properly installing
the
power element bulb.
Attachment
of the
expansion valve bulb
to the
evap-
orator outlet line
is
very critical.
The
bulb must be
attached tightly
to the
line
and
must make good contact
with
the
line along
the
entire length
of
the bulb. A loose
bulb will result
in
high
low
side pressures and poor
cooling.
On
bulbs located outside
the
evaporator case
insulation must be properly installed.
The external equalizer line shown
in
Figure
55 is
not
used
in the
Custom
and
Chevy
II
All-Weather systems.
Indications
of
expansion valve trouble provided by the
Performance Test are
as
follows:
VALVE STUCK OPEN
OR
BROKEN POWER
ELEMENT
Noisy Compressor.
•
No Cooling
-
Freeze
Up.
VALVE STUCK CLOSED
OR
PLUGGED SCREEN
Very Low Suction Pressure.
No Cooling.
Fig.
52-P.O.A. Valve Installed
Fig.
53—Thermostatic Switch Removal
CHEVROLET CHASSIS SERVICE MANUAL
Page 65 of 659
HEATER AND AIR CONDITIONING 1A-42
EXTERNAL
EQUALIZER LINE
Fig. 54—Thermosratic Switch Adjustment
POORLY LOCATED POWER ELEMENT BULB
Normal Pressure.
Poor Cooling.
ENGINE IDLE COMPENSATOR
This additional aid to prevent stalling during prolonged
hot weather periods is included with all air conditioned
vehicles. The idle compensator is a thermostatically
controlled air bleed which supplies additional air to the
idle mixture. On V-8 engines, with factory installed air
Fig. 55—Expansion Valve
conditioning systems, the compensator is located within
the carburetor and is accessible when the engine air
cleaner is removed. On all other vehicles the compen-
sator is threaded into a manifold, fitting below the
carburetor. All compensators are factory set and are
non-adjustable. A malfunctioning unit should be replaced.
NOTE:
If engine idle is erratic, hold the idle
compensator valve closed with a pencil or
wooden dowel while adjusting the idle mixture
screw(s). Never attempt to bend the bimetal
strip or attempt any valve adjustment.
EVACUATING AND CHARGING PROCEDURES
1967 AIR CONDITIONING SYSTEM CAPACITIES
Four-Season Systems (Chevrolet and Chevelle)
Universal System (Chevrolet, Chevelle and Camaro)
Universal and All-Weather System (Chevy II)
Refrigerant Charge
3 lbs., 12 oz.
3 lbs.
2 lbs., 8 oz.
Oil Charge
11 ozs. 525 viscosity
11 ozs. 525 viscosity
11 ozs. 525 viscosity
PURGING THE SYSTEM
In replacing any of the air conditioning components the
system must be completely purged or drained of re-
frigerant. The purpose is to lower the pressure inside
the system so that a component part can be safely
removed.
1.
With engine stopped install high and low pressure
lines of gauge set to the proper high and low pres-
sure gauge fittings (see "Installing Gauge Set to
Check Operation").
2.
With plug removed from the centerline on the gauge
manifold, open high pressure gauge valve and dis-
charge the vapor slowly through the center
connection.
CAUTION: Do
compressor
refrigerant.
not open valves too much or
oil may be discharged with the
A rag wrapped around the end of
the center gauge line will prevent the splashing
of oil in the event of accidental rapid discharge.
CHEVROLET CHASSIS SERVICE MANUAL
Page 73 of 659
HEATER AND AIR CONDITIONING 1A-50
Fig.
64—Receiver-Dehydrator Mounting (Corvette)
3.
4.
5.
6.
To gain access to the blower motor end of the as-
sembly, remove the fender and skirt.
Remove the assembly to firewall attaching screws.
Remove the entire assembly from the vehicle.
Reverse the above procedure when installing the
assembly into the vehicle.
Core Replacement
1.
Disconnect the connections at the suction throttling
valve inlet and the expansion valve outlet. Remove
the expansion valve bulb from the core outlet line.
Cap all open lines. .
Remove the screws attaching the evaporator cover
to the firewall and to the evaporator assembly and
remove the cover.
Remove the screws attaching the core to the assem-
bly and remove the core.
Reverse the above steps for core replacement.
Add three fluid oz. refrigerant after installing a
new core, evacuate and charge the system.
2.
3.
4.
5.
Comfortron
The evaporator assembly is nearly identical to that
of the Four-Season system, and, with the exception of
additional wiring and vacuum hoses, service procedures
are the same.
Chevelle Four-Season System
Removal
•
1.
Purge the system of refrigerant, then remove the
right fender skirt and the hood hinge. Do not remove
the fender.
2.
Disconnect the high pressure line (between the
receiver-dehydrator and the thermostatic expansion
valve) at the expansion valve, and the suction throt-
tling valve to compressor line at the suction throt-
tling valve. Cap and seal all open lines.
3.
Remove the three screws attaching the duct assembly
to the evaporator housing and the blower assembly.
4.
Remove the bolts attaching the evaporator assembly
to the cowl and carefully pull the assembly from the
vehicle. The duct assembly will be removed at this
time also.
Core Replacement
1.
With the evaporator assembly removed from the
vehicle, remove the expansion valve and its bulb.
2.
Remove the four nuts and bolts holding the two
halves of the evaporator housing together and sepa-
rate the halves.
3.
The evaporator core may now be removed.
4.
Leak test the new core and connections, before in-
stalling the core in the housing, by installing the
expansion valve and all refrigerant lines. Connect an
R-12 cylinder to the low pressure compressor gauge
fitting and charge the system to cylinder pressure,
then leak test.
5. After satisfactorily testing the core, install it into
the housing and reassemble the two sides of the.
housing.
Installation
1.
Remove the right trim pad and the screws attaching
the air conditioning duct to the kick panel. This
should allow the duct to be pulled slightly loose from
the kick panel. If not it may be necessary to loosen
the entire duct to obtain the necessary clearance.
2.
Install the evaporator in the cowl being sure that
the duct assembly is in place between an evaporator
housing and the blower assembly.
3.
Replace all bolts and screws.
4.
Move the interior air conditioning duct until sure
that the duct gasket is properly positioned over the
evaporator housing flange. Proper gasket fit at this
point is of great importance.
5. Replace all refrigerant lines.
6. Evacuate and charge the system. Add three fluid oz.
refrigerant oil after installing a new core.
7. Replace the fender skirt and hood hinge.
Universal System All Vehicles
Core and/or Expansion Valve Replacement
Since repairs should never be made on the evaporator
core, a defective unit must be replaced. Before replacing
the core, however, check to be sure that any leaks pres-
ent are not located at the hose connections or expansion
valve connections.
CHEVROLET CHASSIS SERVICE MANUAL
Page 74 of 659
HEATER AND AIR CONDITIONING 1A-51
RETAINER
WASHER
GLASS
•O"
RING
Fig.
65-Sight Glass Replacement
Removal
1.
Purge the system.
2.
Disconnect the refrigerant lines at the right rear of
the unit.
3.
Remove the unit from the dash. Disconnect all elec-
trical connectors.
4.
Remove the front cover, withdraw the thermostatic
switch capillary, and separate to the case halves.
5. Remove the clamps from the evaporator inlet and
qutlet pipes.
6. Remove the screws which attach the evaporator to
the case and remove evaporator. '
7. Ljoosen the clamp which mounts the capillary bulb
to the evaporator. Disconnect the inlet and outlet
pipes from the expansion valve and remove the
expansion valve.
Fig.
66—Evaporator Mounting (Chevrolet and Camaro)
Fig.
67—Evaporator Mounting (Chevelle)
CHEVROLET CHASSIS SERVICE MANUAL
Page 76 of 659
HEATER AND AIR CONDITIONING 1A-53
Fig.
70—Wiring and Vacuum Lines—Four-Season (Camaro)
Installation
1.
Connect the expansion valve to the refrigerant pipes.
Attach the capillary bulb to the evaporator.
2.
Attach the evaporator to the- case. Attach the inlet
and outlet pipes clamps.
3.
Assemble the case halves. Insert the capillary tube
from the thermostatic switch between the fins as
shown in Figure . Attach the cover plate to the
case.
4.
Mount the unit to the dash and connect the refrigerant
lines.
5.
Evacuate and charge the system. If a new evaporator
was installed, add three fluid ounces of refrigerant
oil to the system before charging.
6. Test system operation.
Chevy II All-Weather System
Removal
Under
the Hood
1.
Purge the refrigerant from the system.
2.
Remove the refrigerant hoses from the evaporator
inlet and outlet connections extending through the
special grommet in the dash panel and into the
engine compartment.
3.
Remove the screw, nut, spacer bracket and grommet
from the outlet connection pipes.
Within the Car
4.
Remove the glove box, ash tray and ash tray
retainer.
5.
Reach through the glove box door to disconnect the
air conditioning "on" door bowden cable (fig. 75).
6. Remove the two shield attaching screws and shield
(A, fig. 76) which covers the lower right evaporator
bracket-to-blower bracket attaching screw (B, fig.
76),
then remove this screw.
7.
Behind the lower left side of ihe evaporator, remove
the evaporator bracket-to-heater distributor bracket
attaching screw (C, fig. 76).
8. Reaching through the glove box door and ash tray
openings, remove the two nuts and washers (D,
fig.
76) attaching the evaporator assembly studs to
the lower instrument panel flange and reinforcement.
9. Disconnect the drain hoses and carefully pull the
evaporator unit toward the rear of the vehicle.
10.
Disconnect wiring connectors (see fig. 77) as nec-
essary and remove the evaporator unit from the
vehicle.
Gore and/or Expansion Valve Replacement
A defective unit must be replaced since repairs should
never be made on the evaporator core. Before replacing
the core, however, check to be sure that any leaks pres-
sent are not located at the hose connections or expansion
valve connections. The following procedure assumes that
the evaporator unit has been removed from the vehicle
as outlined above.
CHEVROLET CHASSIS SERVICE MANUAL
Page 77 of 659
HEATER AND AIR CONDITIONING 1A-54
Fig.
71-Wiring-AH Weather (Chevy II)
1.
Loosen the lock screws and remove the two control
knobs from the front of the evaporator unit. Then
use a suitable spanner wrench to remove the two
nuts beneath the control knobs.
2.
Remove the screws (located in the outer ball outlets)
attaching the face plate.to the evaporator case. Then
remove the face plate and, reaching through this
opening, carefully remove the plug attaching the
thermostatic switch capillary tube to the evaporator
core.
3.
Turning the unit over, remove the screws attaching
the back cover and gasket to the case and remove
the cover and gasket.
4.
From the top of the case, remove the screws attach-
ing the evaporator core brackets to the case.
5.
Carefully draw the core and expansion valve assem-
bly out of the case.
NOTE: The air conditioning "on" door bowden
cable, which extends through the core, will also
be removed at this time.
6. Remove the expansion valve power element from
the low pressure line.
7.
Disconnecting the high pressure and low pressure
lines from the valve, remove the valve from the
core.
8. At this point either the expansion valve, evaporator
core or both may be replaced.
a. If replacing the expansion valve, use new etO"
rings and make the connections carefully to
eliminate possible refrigerant leaks. Position
the power element bulb so that it lies flush with
the low pressure line and has the insulating
material properly in place.
b.
If the evaporator core is to be replaced, it will
be necessary to remove the air conditioning
door bowden cable from the core and install it
in the same location in the replacement core.
If no passage has been provided for this purpose
in the replacement core, a pointed instrument
such as a pencil may be forced through core
vanes at the proper location to provide the re-
quired opening. Also remove the spacer bracket,
nut and screw from the inlet and outlet pipes of
the evaporator core and place them in a like
position on the replacement core.
CHEVROLET CHASSIS SERVICE MANUAL
Page 80 of 659
HEATER AND AIR CONDITIONING 1A-57
EVAPORATOR PIPES
DISTRIBUTOR RELAY GRD.
ASSEMBLY & WASHER
EVAPORATOR ASM.
BLOWER
SHROUD
(RACKET
(PART OF
BLOWER)
Fig.
76—Evaporator Removal—All Weather
7. Disconnect the thermostatic expansion valve to evap-
orator inlet connector, remove the power element
bulb from the evaporator outlet line and carefully
move .the valve and its inlet hose away from the
evaporator case.
8. Remove the electrical connectors from the relay
and resistor terminals.
9. Remove the screws attaching the evaporator case
cover to the case. See Fig. 79. The core is bracket
mounted to the cover and the entire core and cover
assembly may now be removed from the vehicle.
10.
Remove the two cover to core bracket screws and
separate the core from the cover.
11.
Install the new core to the cover being sure that the
grommets are properly installed around the inlet
and outlet lines.
12.
Reinstall the core and cover assembly into the evap-
orator case and replace the attaching screws.
13.
Reinstall the STV and expansion valves, the equal-
izer line connection and the evaporator oil bleed line
from the STV.
NOTE:
Use all new «O" rings.
14.
Reinstall the radiator supply tank, water valve and
vacuum line, and replace the heater hoses onto the
core pipes being sure not to switch the hoses. Then
refill the radiator.
15.
Add three fluid oz. refrigerant oil after installing a
new core, evacuate and charge the system.
EXPANSION VALVE
The thermostatic expansion valve is factory adjusted
and pre-set and cannot be adjusted after installation. A
malfunctioning valve must be replaced. However, before
proceeding, check all other possible causes of the trouble.
Make certain that the power element bulb is properly
CHEVROLET CHASSIS SERVICE MANUAL
Page 81 of 659
HEATER AND AIR CONDITIONING 1A-58
Fig.
77-Underdash Wiring-All Weather
positioned on the low pressure line, tightly clamped and
has the insulation in place. Make certain the liquid inlet
screen between valve and receiver- dehydrator line is not
clogged. After checking the screen and the location and
mounting of the thermo-bulb, proceed with replacement of
the valve assembly. A malfunctioning valve may result
from a stuck open or shut needle caused by corrosion^ or
a discharged power element caused by a broken capillary
line or tip.
Four-Season System Chevrolet, Chevelle,
Corvette, and Camaro
Replacement
1.
Purge the system and, on Chevelle models, drop
the right fender skirt.
2.
Remove the expansion valve power element bulb
from the low pressure line and the equalizing line
from the POA valve.
3.
Remove the low and high pressure connectors from
the valve, in that order. Remove the screw and
bracket attaching the expansion valve to the blower
case and remove the valve.
4.
Before replacing the valve, check to be certain the
inlet screen, is not clogged. If the screen is plugged,
replace it and check valve operation. If screen is
clear or if valve still malfunctions after screen re-
placement proceed with the valve replacement.
5. Install the new valve by connecting the lines. Clamp
the power element bulb of the new valve to the top of
the low pressure line and the equalizing line to the
suction throttling valve.
NOTE:
Be sure to replace the insulation around
the power element bulb and that the power ele-
ment makes good physical contact with the suc-
tion line.
6. Evacuate and charge the system.
CHEVROLET CHASSIS SERVICE MANUAL
Page 82 of 659
HEATER AND AIR CONDITIONING 1A-59
Fig.
78—Evaporator Mounting (Corvette)
7. Check the system for proper operation.
Universal System
Follow the procedure outlined under " Evaporator" for
the Universal System.
Chevy II All-Weather System
Replacement of Valve Assembly
1.
Purge the system of refrigerant and remove the
evaporator unit from the vehicle and the core from
the unit as described under "Evaporator."
2.
Remove the expansion valve power element bulb and
the equalizing line connection from the low pressure
line.
3.
Remove the low pressure and high pressure lines
from the valve. Remove the valve.
4.
Install the new valve by connecting the low pressure,
high pressure and* equalizing line connections and
clamp the power element of the new valve to the low
pressure line.
5. Replace the core and evaporator as covered under
"Evaporator."
EVAPORATOR CONTROL VALVE (POA)
(Chevrolet, Chevelle, Comoro, Corvette)
No repairs or adjustments are available on the POA
valve. A malfunctioning valve must be replaced. Figures
80,
81, 82 and 83 illustrate valve installation on the above
vehicles.
THERMOSTATIC SWITCH OR BLOWER SWITCH
Universal System
Removal
1.
Remove the screws attaching the cover plate to the
unit and pull the cover rearward.
2.
(Fin sensing type) Remove the thermostatic capillary
tube from the evaporator core to permit access to
the back of the cover plate.
Fig.
79—Evaporator Core Removal (Corvette)
Fig.
80-P.O.A. Installation (Chevrolet)
CHEVROLET CHASSIS SERVICE MANUAL
Page 332 of 659
ENGINE-ELECTRICAL 6Y-7
CHARGING SYSTEM
INDEX
Page
General Description . 6Y-7
Maintenance and Adjustments 6Y-9
Static Checks . 6Y-10
System Condition Check and Voltage
•Regular Adjustment. 6Y-10
General Output 6Y-11
Generator Diode and Field Test 6Y-12
Indicator Lamp-Initial Field Excitation
Circuit Tests . 6Y-12
Page
Field Circuit Resistance Wire Tests 6Y-13
Field Relay Test and Adjustment 6Y-14
Other Harness Checks 6Y-14
Service Operations 6Y-14
Generator 6Y-14
Removal and Installation 6Y-14
Pulley Replacement. 6Y-14
Brush Replacement (6" Delcotron). 6Y-15
Double Contact Regulator . . . . . . 6Y-16
GENERAL DESCRIPTION
The charging system includes the battery, generator,
regulator, telltale light, and necessary wiring to connect
these components. The Delcotron is offered as standard
equipment, although there are various capacities avail-
able on all models.
The Delcotron continuous output A.C. generator (fig.
lc) consists of two major parts, a stator and a rotor. The
stator is composed of a large number of windings as-
sembled on the inside of a laminated core that is attached
to the generator frame. The rotor revolves within the
stator on bearings located in each end frame. Two
brushes are required to carry current through the two
slip rings to the field coils wound concentric with the
shaft of the rotor. Six rectifier diodes are mounted in the
slip ring end frame and are joined to the stator windings
at three internally located terminals.
Diodes are mounted in heat sinks to provide adequate
heat dissipation. The six diodes replace the separately
mounted rectifier as used in other types of application.
The diodes change the Delcotron A.C. current to D.C.
current.
Two regulators (fig. 2c) are available on the 1967 vehi-
cles,
a double contact two unit type and a transistor
regulator. The function of these regulators in the charg-
ing system is to limit the generator voltage to a pre-set
value by controlling the generator field current. Both
regulators have an internal field relay unit. The relay
unit allows the telltale lamp to light (as a bulb check)
with the ignition key on and engine not running. When the
engine is started and the generator begins to charge, the
indicator light goes out indicating that the system is op-
erating normally.
The double contact regulator, when used with the
special 63 amp air conditioning model generator (4 ohm
field coil) uses a field discharge diode internally in the
field circuit (figs. 3c and 4c). The added diode adapts the
BRUSH AND
TERMINAL
ASSEMBLY
SLIP RINGS
SLIP RING
END FRAME
_\
THRU
BOLT
DRIVE END
FRAME
BEARING
BEARING
DIODES
ROTOR
5.5" SERIES ID DELCOTRON
STATOR
ASSEMBLY
GREASE
RESERVOIR
BRUSH
FAN ASSEMBLY
6.2" SERIES 2D TYPE 150 DELCOTRON
Fig.
lc—Delcotron Cross-section View
CHEVROLET CHASSIS SERVICE MANUAL