GENERAL INFORMATION 0-5
Fig.
10—Delcotron Unit
Serial Number
Fig.
11—3-4 Speed Transmission Unit
Number Located on Lower Left Side of
Case Adjacent to Rear of Cover
(Saginaw)
Fig.
12-3 Speed Borg-Warner
Transmission Unit Number Located on
Boss Right Rear Comer of Extension
Fig.
13 — 4-Speed Transmission Source
Data Code is Located on Left Side of
Case at Lower Rear of Cover Flange
(Muncie)
Fig.
14—Starter Serial Number and
Production Date Stamped on Outer
Case,
Toward Rear
Fig.
15—Powerglide Transmission Unit
Number located on Right Rear Vertical
Surface of Oil Pan
16—The Turbo Hydra-Matic Transmission Serial Number
is Located on the Light Blue Plate
Location on the Right Side of the Transmission
tumbler, single bitted type having four tumblers. To
protect owners, automobile lock manufacturers stamp
the lock numbers on the lock core, shaft, etc., where they
will not show until lock is removed.
In addition, when a lock cylinder requires replacement
the lock code number may be obtained either from the
key, if available, or from old lock cylinder which is being
replaced.
Fig.
17—Battery Code Number Located on Cell
Cover Segment, Top of Battery
TUMBLERS
5 4 3 2 1
jjwvvvvvjl
SPRING RETAINER
Fig.
18-Side Bar Lock
CHEVROLET CHASSIS SERVICE MANUAL
HEATER AND AIR CONDITIONING 1A-30
Leak Detector
Tool J-6084 (fig. 43) is a propane gas-burning torch
which is used to locate a leak in any part of the system.
Refrigerant gas drawn into the sampling tube attached to
the torch will cause the torch flame to change color in
proportion to the size of the leak. Propane gas fuel
cylinders used with the torch are readily available
commercially throughout the country.
CAUTION: Do not use lighted detector in any
place where combustible or explosive gases,
dusts or vapors may be present;
Operating Detector
1.
Open control valve only until a low hiss of gas is
heard, then light gas at opening in chimney.
2.
Adjust flame until desired volume is obtained. This
is most satisfactory when blue flame is approxi-
mately 3/8" above reactor plate. The reaction plate
will quickly heat to a cherry red.
3.
Explore for leaks by moving the end of the sampling
hose around possible leak points in the system. Do
not pinch or kink hose.
NOTE: Since R-12 is heavier than air, it is
good practice to place open end of sampling tube
immediately below point being tested, partic-
ularly in cases of small leaks.
CAUTION: Do not breathe the fumes that are
produced by the burning of R-12 gas in the de-
tector flame, since such fumes can be toxic in
large concentrations of R?»12.
4.
Watch for color changes. The color of the flame
which passes through the reaction plate will change
to yellow when sampling hose draws in very small
CHIMNEY
REACTION PLATE
BURNER HEAD
Fig.
43—Leak Detector
leaks of R-12. Large leaks will be indicated by a
change in color to a vivid purplish-blue. When the
sampling hose passes the leak, the flame will clear
to an almost colorless pale-blue again. If the flame
remains yellow when unit is removed from leak,
insufficient air is being drawn in or the reaction
plate is dirty.
NOTE: A refrigerant leak in the high pressure
side of the system may be more easily detected
when, if possible, the system is in operation. A
leak on the low pressure side may be most
easily detected after the engine has been shut
off for several minutes to allow system pres-
sures to equalize. This particularly applies to
the front seal.
VACUUM PUMP
A vacuum pump should be used for evacuating air and
moisture from the air conditioning system.
Vacuum pump, Tool J-5428, (fig.. 44) is available for
this purpose. It is used as a component part of the
Charging Station J-8393, described previously. The fol-
lowing precautions should be observed relative to tbe
operation and maintenance of this pump.
' • Make sure dust cap on discharge outlet of vacuum
pump is removed before operating.
• Keep all openings capped when not in use to avoid
moisture being drawn into the system.
• Oil should be changed after every 250 hours of nor-
mal operation.
To change oil, simply unscrew hex nut located on
back side of pump, tilt backward and drain out oil
(fig. 44). Recharge with 8 ounces of vacuum pump
oil.
If you desire to flush out the pump, use this
same type clean oil. Do not use solvent.
NOTE: Improper lubrication will shorten the
life of pump.
• If this pump is subjected to extreme or prolonged
cold, allow it to remain indoors until oil has reached
approximate room temperature. Failure to warm oil
will result in a blown fuse.
• A five ampere time delay cartridge fuse has been
installed in the common line to protect the windings
of the compressor. The fuse will blow if an ex-
cessive load is placed on the pump. In the event the
fuse is blown, replace with a five ampere time delay
fuse - do not use a substitute fuse as it will result in
damage to the starting windings.
• If the pump is being utilized to evacuate a burnt-out
system, a filter must be connected to the intake
fitting to prevent any sludge from contaminating the
working parts, which will result in malfunction of the
pump.
• Do not use the vacuum pump as an air compressor.
AVAILABILITY OF REFRIGERANT-12
Refrigerant-12 is available through Parts Stock in 25
lb.
drums and in 15 oz. disposable cans. Valves are
available for
the"
disposable cans, which may be used as
individual cans or as a group of up to four cans (fig. 45).
Tool J-6272 is used with one through four cans. The
use of the four-can fixture makes it possible to charge
the system with a known quantity of refrigerant without
CHEVROLET CHASSIS SERVICE MANUAL
HEATER AND AIR CONDITIONING 1A-81
HORN RELAY
r
CONN.-
14 BROWN
(TO FUSE
PANEL)
BATTERY
1
—I ^ COMPR
ESSOR
DASH y
V-^ PANEL \
GROMMET—%
1 \
_ J~ ") "^
>14 BLACK/RED STRIPE-
FUSE .20 AMP.
•WIRE ASM. BLOWER-
MOTOR
14 BLACK 1
IGNITION SWITCH1
(ACCESSORY
TERMINAL)
CONTROL SWITCH
-RESISTOR
CONN.
•14 TAN
•16 BLACK
LIGHT BLUE STRIPE
•THERMOSTAT CONTROL
EVAPORATOR & BLOWER ASM.
Fig.
117—Universal System Wiring Diagram (Typical)
CHEVROLET CHASSI
AIR INJECTOR REACTOR SYSTEM 6T-5
LEGS LOCK
ON
INSIDE SURFACE
/
BLUE-194,
230
SILVER-250
GREEN-283
BLACK-327,
350, 396 & 427
PRESSURE
RELIEF VALVE
Fig.
7—Installing Pressure Relief Valve
Fig.
8—Pressure Setting Plug
pressure required to open the relief valve. For
identification, the pressure setting plugs are
color coded. To remove the pressure setting
plug, carefully unlock legs from inside surface
of relief valve with a small screw, driver. To
install the pressure setting plug, carefully push
into relief valve until legs lock. If a pressure
setting plug is to be reused be sure leg angles
are sufficient for the pressure setting plug to
lock in place.
SPECIAL TOOLS
J-7055-5
J-6585
J-21844
J-21058
Fig.
9-Special Tools
CHEVROLET CHASSIS SERVICE MANUAL
CLUTCH AND TRANSMISSIONS
7*30
V-8 Models-With Uni-Directional Linkage
1.
Remove air cleaner.
2.
Disconnect accelerator linkage at carburetor.
3.
Disconnect accelerator return and TV rod return
springs.
4.
With right hand, pull TV upper rod forward until
transmission is through detent. With left hand, open
carburetor to wide open throttle position. Carbure-
tor must reach wide open throttle position at the
same time the ball stud contacts end of slot in upper
TV rod.
5. Adjust swivel on end of upper TV rod to obtain set-
ting described in Step 4. Allowable tolerance is
approximately 1/32".
6. Connect and adjust accelerator linkage as described
in Section 6.
7. Check for throttle linkage freedom.
Neutral Safety Switch Adjustment
The adjustment at the neutral safety switch is de-
scribed in the Electrical Section 12.
Throttle Return Check Valve (Dashpot) Adjustment
The adjustment of the throttle return check valve is
described in Section 6M for each carburetor installation.
Fig.
12PG - Floor Mounted Control Lever and
Bracket Assembly (Chevrolet Shown)
COMPONENT PARTS REPLACEMENT
TRANSMISSION REPLACEMENT (EXC. CORVETTE)
Removal
1.
Raise car on hoist (preferably) or on stand jack and
remove oil pan drain plug to drain oil.
NOTE:
If desired, the oil may be drained after
transmission removal.
2.
Disconnect the oil cooler lines (external cooled
models), vacuum modulator line and the speedometer
drive cable fitting at the transmission. Tie lines
out of the way.
3.
Disconnect manual and TV control lever rods from
transmission.
4.
Disconnect propeller shaft from transmission.
5. Install suitable transmission lift equipment to jack
or other lifting device and attach on transmission.
6. Disconnect engine rear mount on transmission ex-
tension, then disconnect the transmission support
crossmember and slide rearward.
7. Remove converter underpan, scribe flywheel-con-
verter relationship for assembly, then remove the
flywheel-to-converter attaching bolts.
NOTE:
The "light" side of the converter is
denoted by a "blue" stripe painted across the
ends of the converter cover and housing. This
marking should be aligned as closely as possible
with the "white" stripe painted on the. engine
side of the flywheel outer rim (heavy side of
engine) to maintain balance.
8. Support engine at the oil pan rail with a jack or other
suitable brace capable of supporting the engine
weight when the transmission is removed.
9. Lower the rear of the transmission slightly so that
the upper transmission housing-to-engine attaching
bolts can be reached using a universal socket and a
long extension. Remove upper bolts.
CAUTION: Oh V-8 engines, care must be taken
not to lower rear of transmission too far as the
distributor housing may be forced against the
dash causing damage to the distributor. It is
best to have an assistant observe clearance of
all upper engine components while the trans-
mission rear end is being lowered.
10.
Remove remainder of transmission housing-to-
engine attaching bolts.
11.
Remove the transmission by moving it slightly to the
rear and downward, then remove from beneath the
car and transfer to a work bench.
NOTE:
Observe converter when moving the
transmission rearward. If it does not move
with the transmission, pry it free of flywheel
before proceeding.
CAUTION: Keep front of transmission upward
to prevent the converter from falling out. Install
converter Tool J-9549 (or a similar tool con-
structed as shown in Figure 13PG, or, in an
emergency, a length of strong wire may be used)
immediately after removal from the engine.
Installation
NOTE:
The "light" side, of the converter is
denoted by a "blue" stripe painted across the
ends of the converter cover and housing. This
marking should be aligned as closely as possible
CHEVROLET CHASSIS SERVICE MANUAL
CLUTCH AND TRANSMISSIONS 7-31
with the "white" stripe painted on the engine
side of the flywheel outer rim, denoting the
"heavy" side of the engine.
1.
Mount transmission on transmission lifting equip-
ment installed on jack or other lifting device.
2.
Remove converter holding tool.
CAUTION: Do not permit converter to move
forward after removal of holding tool.
3.
Raise transmission into place at rear of engine and
install transmission case to engine upper mounting
bolts,
then install remainder of the mounting*bolts.
Torque bolts to 35 ft. lbs.
4.
Remove support from beneath engine, then raise
rear of transmission to final position.
5. Through flywheel cover opening align as closely as
possible the "white" flywheel balance mark stripe
and the "blue" painted stripe on the end of converter
cover and housing. If scribed during removal, align
scribe marks on flywheel and converter cover. In-
stall converter to flywheel attaching bolts. Torque
bolts to 15-20 ft. lbs.
6. Install converter under pan.
7. Reinstall transmission support crossmember to
transmission and frame.
8. Remove transmission lift equipment.
9. Connect propeller shaft to transmissions.
10.
Connect manual and TV control lever rods to
transmission.
11.
Connect oil cooler lines (if so equipped), vacuum
Fig.
13PG - Converter Holding Tool
modulato:* line, and speedometer drive cable to
transmission.
12.
Refill transmission through filler tube, using Funnel
J-4264 and following the recommended procedure
provided earlier in this section.
13.
Check transmission for proper operation and for
leakage. Check and, if necessary, adjust linkage.
CORVETTE POWERGLIDE TRANSMISSION
Replacement
1.
Disconnect battery ground cable.
2.
Remove ball end from transmission shift control
lever.
3.
Raise front and rear of vehicle.
4.
Insert a block of wood between the top of the dif-
ferential carrier housing and the underbody (to
prevent upward travel of the carrier when the car-
rier front support is disconnected).
5. Disconnect the differential carrier front support
from its frame bracket, by removing the nut on the
underside of the biscuit mount.
6. Pry the carrier downward to relieve load while re-
moving the two center mounting bolts from the
carrier front support. (To pry carrier downward
insert crowfoot end of a pry bar**hrough the open-
ing in the carrier front support, hooking end of bar
over top of the center mounting bolt pad cast in the
underside of the carrier).
7. Pivot carrier support downward for access to prop
shaft "U"-joint.
8. Disconnect prop shaft front and then rear
"U"
bolts.
9. Disconnect parking brake cable from ball socket at
idler lever located near center of underbody.
10.
Remove prop shaft by moving shaft forward.
11.
Remove left bank exhaust pipe.
12.
Remove right bank exhaust pipe and heat riser.
13.
Disassemble the transmission mount, as follows:
a. Remove the two bolts that attach rear mount
cushion to the rear mount bracket.
b.
Support engine under oil pan and raise engine to
remove load from rear mount cushion.
CAUTION: To avoid damage to oil pan, a suit-
able wide base, heavy wood platform should be
placed between the jack pad and the oil pan.
c. Remove the three transmission mount bracket-
to-crossmember bolts, then remove mount
bracket.
d. Remove the two bolts from mount pad to trans-
mission case and remove rubber mount cushion
and exhaust pipe "yoke".
14.
Disconnect oil cooler lines at transmission and
swing lines clear.
15.
Remove connector underpan.
16.
Remove converter to flywheel attaching bolts.
17.
At transmission disconnect vacuum modulator line
and speedometer cable.
18.
Disconnect transmission shift linkage from trans-
mission gearshift control lever. Remove shift lever.
19.
At transmission, remove throttle valve linkage and
disconnect neutral safety switch linkage, also re-
move the gearshift control linkage.
20.
Remove neutral safety switch from transmission
control bracket.
CHEVROLET CHASSIS SERVICE
ACCESSORIES 15-2
GENERAL DESCRIPTION
The Cruise Master is a speed control system which
employs engine manifold vacuum to power the throttle
Servo unit. The Servo moves the throttle when speed
adjustment is necessary by receiving a varying amount
of bleed air from the Regulator unit. The Regulator
varies the amount of bleed air through a valve system
which is linked to a speedometer-like mechanism. The
speedometer cable from the transmission drives the
Regulator, and a cable from the Regulator drives the
instrument panel speedometer. The. engagement of the
Regulator unit is controlled by an Engagement Switch
located at the end of the turn signal lever. Two brake
release switches are provided: an Electric Switch dis-
engages the Regulator unit and a Vacuum Switch de-
creases the vacuum in the Servo unit to quickly return
the throttle to idle position.
The operation of each unit of the system and the
operation of the entire system under various circum-
stances is described below. Figure 1 shows the location
of the system components within the vehicle-
COMPONENT OPERATION
ENGAGEMENT SWITCH
This switch, located within the turn signal knob, has
three positions. In the fully released position, the switch
passes current through resistance wire to effect a "hold
in" magnetic field in the Regulator solenoid. This cur-
rent is sufficient only to hold the solenoid in place once
it has been actuated by the "pull in" circuit. Depressing
the button partially allows current to flow to the Regu-
lator solenoid at full voltage which causes the solenoid
to pull in. Depressing the button fully opens the circuit
to both the resistance and standard solenoid feed wires
and the solenoid becomes de-activated.
During vehicle operation the three switch positions
have the following functions:
Released
a. System not engaged: No function of the system
will occur although a small current is flowing
through the solenoid via the resistance wire (at
vehicle speeds over 20 mph).
b.
System engaged: The small current flowing
through the resistance wire is holding the solenoid
in the engaged position.
^r-WIRE RELIEF LUG
1 ^-#2-BLUE WIRE
L'3.BLACK WIRE
X /-TURN SIGNAL LEVER
SWITCH—^
^SN
RETAINING RING-^ %^
BUTTON -^
Fig.
2 - Cruise Master Engagement Switch
Partially Depressed
Full voltage is applied to the solenoid (vehicle speed
over 20 mph) which sets the Regulator to maintain the
vehicle speed at the time of Regulator engagement.
Fully Depressed
No electricity flows to the solenoid and the Regulator
is inactive. This position is used by the driver when he
desires to raise or lower his controlled speed. He may
accelerate to his new speed, press the button fully (Regu-
lator releases previously set speed) and release the but-
ton. Upon releasing the button, it passes through the
partially depressed position and the solenoid is "pulled
in", then into released position which provides "hold in"-
current. The driver may also press the button fully with
no pressure on the accelerator pedal. In this case the
regulator releases control of the throttle which returns
to idle and the car slows. When the button is released
the solenoid is pulled in and held in respectively and the
regulator resumes speed control at the speed of the
vehicle during the moment of button release (at vehicle
speeds over 20 mph).
LOCK
NUT
ORIFICE
TUBE
AND
CONNECTOR
ASSEMBLY
AIR FILTER AND
SOLENOID HOUSING COVER
Fig. 3 - Regulator Unit
CHEVROLET CHASSIS SERVICE MANUAL
ACCESSORIES
15-8
BROWN
BRAKE
SWITCH
+12V *
BLACK
CONNECTOR
AT FUSE BLOCK
CRUISE POSITION
BUTTON RELEASED
ENGAGE POSITION
BUTTON PARTIALLY DEPRESSED^ N. ENOAOi SWITCH
TRIM POSITION N. N. I
BUHON FULLY DEPRESSED. \ ^
BROWN
BLUE
ENGAGE SWITCH
CONFIGURATION
BLACK
BLUE
REGULATOR
- SOLENOID COIL
(5 a RESISTANCE)
9 BLACK
BLUE
REGULATOR
Fig.
10 - Wiring Diagram
Replacement
1.
Insert the switch into the turn signal knob, push the
retaining ring firmly against the switch, and push the
operating button onto the switch plunger. " .
SERVO
Service
—
H the Servo unit is found to be defective, re-
placement is required. Note the condition of the hoses
and replace any which are cracked or deteriorated.
CHEVROLET CHASSIS SERVICE MANUAL