power steering fluid CHEVROLET CAMARO 1967 1.G Chassis Workshop Manual
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Page 15 of 659
LUBRICATION 0-13
LUBRICATION
INDEX
Page
Engine Crankcase Oil . 0-13
Crankcase Capacities. . 0-13
Lubrication . ,
•
o-13
SAE Viscosity Oils 0-13
Types of Oils 0-14
Maintaining Oil Level 0-14
Oil and Filter Change Intervals 0-14
Oil.
. . ...:.. 0-14
Filter o-14
Crankcase Dilution . 0-14
Automatic Control Devices to Minimize
Crankcase Dilution 0-14
Crankcase Breather Cap 0-14
Crankcase Ventilation System 0-15
Valve Type 0-15
Fuel Filter 0-15
Air Cleaner . 0-15
Polyurethane Type 0-15
Oil Wetted Paper Element Type 0-15
Battery Terminal Washers 0-15
Page
Distributor 0-15
Rear Axle and 3-Speed and Overdrive
4-Speed Transmission 0-15
Recommended Lubricants 0-15
Multi-Purpose Gear Lubricants 0-15
Lubricant Additions 0-15
Lubricant Changes 0-15
Powerglide Transmission 0-15
Turbo Hydra-Matic 0-16
Front Wheel Bearings 0-16
Manual Steering Gear . . . . 0-16
Power Steering 0-16
Air Conditioning 0-16
Brake Master Cylinder. 0-16
Parking Brake 0-16
Clutch Cross-Shaft , 0-16
Chassis Lubrication 0-16
Lubrication Diagrams . . 0-19
Body Lubrication (Chevrolet, Chevelle, Chevy n, Camaro). 0-20
Body Lubrication Points (Corvette) . 0-21
The selection of the proper lubricant and its correct
application at regular intervals does much to increase the
life and operation of all moving parts of the vehicle.
Consequently, it is important that the correct grade of
oil or grease, as noted in the following pages, be used.
ENGINE CRANKCASE OIL
Crankcase Capacity
4 Cylinder 4 qt.
6 Cylinder 4 qt.
8 Cylinder (283) 4 qt.
8 Cylinder (327) 4 qt.
8 Cylinder (350) 4 qt.
8 Cylinder (396) 4 qt.
8 Cylinder (427) Chevrolet 4 qt.
8 Cylinder (427) Corvette 5 qt.
For 4 Cyl. Add .5 qt. with filter change;
1 qt. for 6 and 8 Cyl. engines.
Lubrication
Crankcase oil should be selected to give the best per-
formance under the climatic and driving conditions in the
territory in which the vehicle is driven.
During warm or hot weather, an oil which will provide
adequate lubrication under high operating temperatures
is required.
During the colder months of the year* an oil which will
permit easy starting at the lowest atmospheric tempera-
ture likely to be encountered, should be used.
When the crankcase is drained and refilled, the crank-
case oil should be selected, not on the basis of the exist-
ing temperature at the time of the change, but on the
lowest temperature anticipated for the period during
which the oil is to be used.
Unless the crankcase oil is selected on the basis of
viscosity or fluidity of the anticipated temperature, dif-
ficulty in starting will be experienced at each sudden
drop in temperature.
SAE Viscosity Oils
SAE Viscosity Numbers indicate only the viscosity or
body of the oil, that is, whether an oil is a light or a
heavy body oil, and do not consider or include other
properties or quality factors.
The lower SAE Viscosity Numbers, such as SAE 5W
and SAE 10W which represent the light body oils, are
recommended for use during cold weather to provide
easy starting and instant lubrication. The higher SAE
Viscosity Numbers such as SAE 20 and SAE 20W, which
represents heavier body oils, are recommended for use
during warm or hot weather to provide improved oil
economy and adequate lubrication under high operating
temperatures.
Oils are available which are designed to combine the
easy starting characteristics of the lower SAE Viscosity
Number with the warm weather operating characteristics
of the higher SAE Viscosity Number. These are termed
"multi-viscosity oils," SAE 5-10W, SAE 5W-20, SAE
10W-20W, and SAE 10W-30.
The following chart will serve as a guide for the
selection of the correct SAE Viscosity Number for use
under different atmospheric temperature ranges, and
suggests the appropriate SAE Viscosity Numbers when
multi-viscosity oils are used.
Lowest Anticipated
Temperature
During Time
Oil Will Be
in Crankcase
32°F.
0°F.
Below 0°F.
Recommended
SAE Viscosity
Oils
SAE 20 or 20W
SAE 10W
SAE 5W
Recommended
SAE
Multi-
Viscosity
Oils
SAE 10W-30 .
SAE 10W-30
SAE 5W-20
SAE 30 or 10W-30 is recommended when most of the
driving is at high speeds and/or at temperatures above
90
°F.
CHEVROLET CHASSIS SERVICE MANUAL
Page 18 of 659
LUBRICATION 0-16
Every 12,000 miles (more frequently*, depending on
severity of service, if vehicle is used to pull trailers,
carry full loads during high ambient temperatures,
operate in mountainous terrain or operate under other
severe conditions--Remove fluid from the transmission
sump and add one and a half quarts of fresh fluid for
Camaro and Chevy II and two quarts for Chevrolet,
Chevelle, and Corvette. Operate transmission through all
ranges and check fluid level as described above.
•Except if vehicle is equipped with transmission pro-
vided in heavy duty service options. If so equipped,
drain converter and pump every 12,000 miles and add
approximately seven and a half quarts of fresh fluid
for Chevy II and nine quarts for Chevrolet and Chevelle.
TURBO HYDRA-MATIC
Lubrication. recommendations for the Turbo Hydra-
Matic are the same as outlined for the Powerglide
transmission except for fluid capacity and filter change
listed below.
After checking transmission fluid level it is important
that the dip stick be pushed all the way into the fill tube.
Every 12,000 miles — after removing fluid from the
transmission sump, approximately 7 1/2 pints of fresh
fluid will be required to return level to proper mark on
the dip stick.
Every 24,000 miles, or at every other fluid change--
the transmission sump strainer should be replaced.
FRONT WHEEL BEARINGS
It is necessary to remove the wheel and hub assembly
to lubricate the bearings. The bearing assemblies should
be cleaned before repacking with lubricant. Do not pack
the hub between the inner and outer bearing assemblies
or the hub caps, as this excessive lubrication results in
the lubricant working out into the brake drums and
linings.
Front wheels of all passenger car models are equipped
with tapered roller bearings and should be packed with a
high melting point water resistant front wheel bearing
lubricant whenever wheel and hub are removed.
CAUTION: "Long fibre" or "viscous" type
lubricant should not be used. Do not mix wheel
bearing lubricants. Be sure to thoroughly clean
bearings and hubs of all old lubricant before
repacking.
The proper adjustment of front wheel bearings is one
of the important service operations- that has a definite
bearing on safety. A car with improperly adjusted front
wheel bearings lacks steering stability, has a tendency to
wander or shimmy and may have increased tire wear.
The adjustment of these bearings is very critical. The
procedure is covered in Section 3 of this manual under
Front Wheel Bearings—Adjust,
MANUAL STEERING GEAR
Check lubricant level every 36,000 miles. If required,
add EP Chassis Lubricant.
POWER STEERING
On models equipped with power steering gear, check
fluid at operating temperature in pump reservoir. Add
GM Power Steering Fluid, or, if this is not available, use
Automatic Transmission Fluid "Type A" bearing the
mark AQ-ATF followed by a number and the suffix letter
'A'
to bring level to full mark on dip stick.
AIR CONDITIONING
After the first 6,000 miles, check all hose clamp
connections for proper tightness.
Every 6,000 miles check sight glass under the hood,
after the system has been in operation for several
minutes. Sight glass should be clear but may, during
milder weather, show traces of bubbles. Foam or dirt
indicate a leak which should be repaired immediately.
BRAKE MASTER CYLINDER
Check level every 6,000 miles and maintain 1/4" below
lowest edge of each filler opening with GM Hydraulic
Brake Fluid Supreme No. 11.
PARKING BRAKE
Every 6,000 miles, apply water resistant lube to park-
ing brake cable, cable guides and at all operating links
and levers.
CLUTCH CROSS-SHAFT
Periodic lubrication of the clutch cross shaft is not
required. At 36,000 miles or sooner, if necessary;
remove plug, install lube fitting and apply CHASSIS
LUBRICANT.
CHASSIS LUBRICATION
For chassis lubrication, consult the lubrication chart.
It shows the points to be lubricated and how often the
lubricant should be applied.
The term "chassis lubricant" as used in this manual,
describes a water resistant EP chassis grease designed
for application by commercial pressure gun equipment.
CHEVROLET CHASSIS SERVICE MANUAL
Page 234 of 659
BRAKES
SECTION 5
CONTENTS OF THIS SECTION
Duo Servo Brakes
Disc Brakes
Page
5-1 Power Brakes
5-24 Special Tools
Page
5-31
5-32
DUO-SERVO BRAKES
INDEX
Page
General Description 5-1
Maintenance and Adjustments 5-3
Hydraulic Brake Fluid .. . 5-3
Bleeding Hydraulic System 5-3
Pressure Bleeding 5-3
Manual Bleeding 5_4
Push Rod to Main Cylinder Clearance 5-5
Hydraulic Brake Lines 5-5
Hydraulic Brake Hose 5-5
Hydraulic Brake Tubing 5-6
Brake Adjustment. .................... 5-7
Service Brake 5-7
Parking Brake 5-8
Component Replacement and Repairs 5-9
Parking Brake - Chevrolet, Chevelle and
Camaro 5^9
Pedal Assembly 5-9
Front Cable ,. . . 5-9
Center Cable 5-9
Rear Cables. . 5-9
Parking Brake - Chevy n 5-9
Lever Assembly 5-9
Idler Lever 5-11
Front Cable 5-11
Rear Cable . . ; 5-12
Parking Brake - Corvette 5-13
Lever Assembly . . . . 5-13
Front Cable 5-14
Rear Cable . . 5-14
Brake Pedal 5-15
Shoes and Linings 5-16
Organic 5-16
Metallic 5-17
Main Cylinder 5-18
Wheel Cylinders 5-21
Anchor Pin 5-22
Front Wheel 5-22
Rear Wheel 5-22
Brake Drums • 5-22
Brake Pipe Distribution and Switch Assembly . . . . . 5-23
Camaro Pressure Regulator Valve 5-23
GENERAL DESCRIPTION
All 1967 models are equipped with a new split brake
system as a safety feature. If a wheel cylinder or brake
line should fail at either the front end or rear end of
the vehicle, the operator can still bring the vehicle to
a controlled stop. The system is designed with separate
hydraulic systems for the front and rear brake using
a dual master cylinder (fig. 1). The design of the master
cylinder is similar to that used on the 1966 Corvette
in that it has two entirely separate reservoirs and outlets
in a common body casting. The front reservoir and outlet
is connected to the front wheel brakes, and the rear
reservoir and outlet is connected to the rear wheel
brakes. Two pistons within the master cylinder receive
mechanical pressure from the brake pedal push rod and
transmit it through the brake lines as hydraulic pressure
to the wheel cylinders. The filler cap is accessible from
inside the engine compartment.
A new brake pipe distribution and switch assembly
is mounted below the main cylinder. The front and rear
hydraulic brake lines are routed from the main cylinder,
through the brake pipe distribution and switch assembly,
to the front and rear brakes as shown in Figure 2. The
switch is wired electrically to the brake alarm indicator
light on the instrument panel. In the event of fluid loss
in either the front or rear brake system the indicator
on the instrument panel will illuminate red. (The indi-
cator will also' be illuminated when the parking brake is
applied.)
On Camaro models equipped with air conditioning, the
rear brake hydraulic line is routed through a pressure
regulator valve mounted on the left frame side rail
(fig. 3). The valve controls the hydraulic pressure to
the rear brakes resulting in the correct pressure balance
between the front and rear hydraulic systems.
The self-adjusting brakes (fig. 4), used on both front
and rear of all models, are the Duo-Servo single anchor
type which utilize the momentum of the vehicle to assist
in the brake application. The self-energizing or
self-
actuating force is applied to both brake shoes at each
wheel in both forward and reverse motion. The brake
shoe linings are bonded to the shoes.
Wheel cylinders are the double piston type permitting
even distribution of pressure to each brake shoe. To
keep out dust and moisture, both ejads of each wheel
cylinder are sealed with a rubber booC The wheel
cylinders have no adjustments.
The Chevrolet, Chevelle, and Camaro parking brakes
have a foot operated ratchet type pedal mounted to the
left of the steering column. A cable assembly connects
the pedal to an intermediate cable by means of an equal-
izer, where the adjustment for the parking brake is
incorporated. The intermediate cable attaches to the
CHEVROLET CHASSIS SERVICE MANUAL
Page 257 of 659
BRAKES
5-24
DISC BRAKES
INDEX
Page
General Description
. 5-24
Maintenance
and
Adjustments
5-24
Bleeding Hydraulic System
5-24
Parking Brake Adjustment
-
Corvette
5-24
Component Replacement
and
Repairs
5-25
Page
Brake Shoes
. . . . . 5-25
Brake Caliper
5-26
Brake Disc
5-29
Main Cylinder.
5-30
Parking Brake Shoes
-
Corvette
5-30
GENERAL DESCRIPTION
Four wheel disc brakes
are
standard equipment
on
the
1967
Corvette,
as in 1966. The
Corvette
may
also
be equipped with heavy duty disc brakes which include
new front calipers, shoes, linings,
and
rear pressure
regulator valve. This heavy duty option
is
used
in
conjunction with
a
vacuum power unit. Front wheel disc
brakes
are
installed
as
optional equipment
on
Chevrolet,
Chevelle, Camaro,
and
Chevy
II
models.
The disc brake,
(fig. 35),
consists
of a
fixed caliper,
rotating disc, splash shield,
and
mounting bracket.
The
caliper assembly contains four pistons and two shoe
and
lining assemblies with
the
lining riveted
to the
steel
shoes.
A
seal
and
dust boot
are
installed
on
each piston,
with
a
piston spring
in the
caliper cylinder bore beneath
each piston.
A
retaining pin extends through each caliper
half
and
both shoes
to
hold
the
shoes and linings
in
posi-
tion
in the
caliper.
On
Corvette heavy duty disc brakes,
two retaining cotter pins
are
used
at
each end
of the
caliper
to
secure
the
shoes
and
linings. Machined
sur-
faces within
the
caliper prevent
the
shoe
and
lining
assembly from rotating with
the
brake disc when pres-
sure
is
applied.
The disc, which
has a
series
of air
vent louvers
to
provide cooling,
is
mounted
on the
front wheel-hub.
The caliper straddles
the
disc and mounts
on a
mounting
bracket attached
to the
steering knuckle with
two
bolts.
The Corvette heavy duty option includes
a
pressure
regulator valve mounted
in the
rear brake line just
below
the
main cylinder. Chevrolet, Chevelle, Camaro,
and Chevy
n
models with disc brakes have
a
pressure
regulator valve mounted
in the
front brake line just
below
the
main cylinder. The valve controls
the
hydraulic
pressure
to the
front
or
rear brakes,
as
applicable,
resulting,
in the
correct pressure balance between
the
front
and
rear hydraulic systems. This valve guards
against premature .lock-up
of
front
or
rear wheels when
brakes
are
applied.
Maintenance, adjustment,
and
service operations which
are
not
included
in
this section
are the
same
as for
the Duo-Servo type brakes.
MAINTENANCE
AND
ADJUSTMENTS
BLEEDING HYDRAULIC SYSTEM
The operation
of
bleeding
the
disc brake hydraulic
system
is the
same
as for
Duo-Servo system outlined
in
the
front
of
this section. Note
the
exceptions below
and refer
to
bleeding procedures under Duo-Servo
brakes.
1.
When pressure bleeding equipment
is
used,
the
correct pressure setting
for
bleeding disc brakes
is 10-2.0
lbs. on
Corvette,
and 40 lbs. on all
other
models.
2.
The
front calipers contain
one
bleeder valve.
The
rear calipers
on
Corvette contain two bleeder valves
(one inboard
and one
outboard) which necessitates
the removal
of the
rear wheels
for
bleeding.
3.
Tapping
the
caliper with
a
rawhide mallet
as the
fluid
is
flowing
out may
assist
in
obtaining
a
good
bleeding
job.
4.
On
Chevrolet, Chevelle, Camaro
and
Chevy
II, the
spring loaded
end of the
pressure regulator valve
(fig.
36)
must
be
held (valve
in
open position) while
bleeding. This
is
done
by
depressing
and
holding
in
the
plunger
in the
end
of
the valve either
by
hand,
by taping,
or by
clamping.
PARKING BRAKE-CORVETTE
Adjustment
1.
Raise rear
end of
vehicle
and
place
on
jack stands.
2.
Remove rear wheels.
3/
Loosen brake cables
at the
equalizer until
the
park-
ing brake levers move freely
to the "off"
position
with slack
in the
cables.
4.
Turn
the
disc until
the
adjusting screw can
be
seen
through
the
hole
in the
disc.
5. Insert
an
adjusting tool
or
screw driver through
the
hole
in the
disc
and
tighten
the
adjusting screw
by
moving your hand away from
the
floor
on
both
the
left and right sides
(fig. 37).
6. Tighten until
the
disc will
not
move, then back
off
ten
(10)
notches.
7. Apply
the
parking brake four
(4)
notches from inside
the
car.
8. Tighten
the
brake cables
at the
equalizer
to
produce
a light drag with
the
wheels mounted.
9. Fully release
the
parking brake handle
and
rotate
the rear wheels.
No
drag should be evident with
the
handle released.
CHEVROLET CHASSIS SERVICE MANUAL
Page 473 of 659
STEERING
9-33
POWER STEERING
INDEX
Page
General Description
. 9-33
Maintenance
and
Adjustments
9-33
Bleeding Hydraulic System
9-33
Fluid Level
. 9-33
Adjustments
. 9-34
Power Steering Gear
. . 9-34
Pump Belt Tension
9-34
Hydraulic System Checks
9-34
Component Replacement
and
Repairs
. 9-35
Power Steering Pump.
. 9-35
Power Steering Gear
9-36
Control Valve
and
Adapter Assembly
9.35
Power Cylinder
9.37
Power Steering Hoses
9.39
GENERAL DESCRIPTION
Two types
of
power steering
are
used
for 1967.
One
is
the conventional linkage type
for
Chevy
n and
Corvette
vehicles
and the
other
is the
integral gear type
for
Chevrolet, Chevelle,
and
Camaro.
For
both types
the
hydraulic pressure
is
provided
by an
engine-driven vane-
type pump.
On
the
Chevy
n and
Corvette linkage type power steer-
ing, hydraulic pressure
is
delivered through
a
hose from
the pump
to a
valve which senses
the
requirement
for
power assistance
and
supplies
the
power cylinder
ac-
cordingly.
The
steering gear used with this power steer-
ing
is the
same basic unit used
on
manually steered
vehicles;
it is
serviced
as
outlined
in the
manual steering
part
of
this section except
for
adjustment, which
is
covered
in the
following pages.
The
steering linkage also
is serviced the same
as
manual counterparts.
The Chevrolet, Chevelle
and
Camaro integral gear type
power steering
has the
hydraulic pressure delivered
from
the
pump through two hoses
to the
steering gear.
In
the power steering gear
the
steering shaft, hydraulic
valve, worm, and rack-piston
nut are all in
line making
a
compact
and
space saving assembly.
All oil
passages
are
internal within
the
gear except
the
pressure
and
return
hoses.
The steering gear
is a
recirculating ball system
in
which steel balls
act as a
rolling thread between
the
steering worm
and
rack-piston
nut. The
rack-piston
nut
is
all one
piece
and is
geared
to the
sector
of
the piston
shaft.
The
valve
is
contained
in the
gear housing elimi-
nating
the
need
of
bolts
or
seals
to
attach
a
separate
valve housing.
The valve
is an
open-center, rotary-type three
way
valve.
The
spool
is
held
in
neutral position by means
of a
torsion
bar. The
spool
is
attached
by
means
of
the stub
shaft
to one end of the
torsion
bar
and
to the
valve body
on
the
other
end.
Twisting
of the
torsion bar allows
the
spool
to
move
in
relation
to the
valve body thereby oper-
ating
the
valve.
MAINTENANCE
AND
ADJUSTMENTS
BLEEDING HYDRAULIC SYSTEM
1.
Fill
oil
reservoir
to
proper level and
let oil
remain
undistrubed
for at
least two minutes.
2.
Start engine
and run
only
for
about
two
seconds.
3.
Add
oil if
necessary.
4.
Repeat above procedure until
oil
level remains
con-
stant after running engine.
5. Raise front
end of
vehicle
so
that wheels
are off
the
ground.
6. Increase engine speed
to
approximately
1500 rpm.
7. Turn
the
wheels
(off
ground) right
and
left, lightly
contacting
the
wheel stops.
8. Add
oil if
necessary.
9. Lower
the car and
turn wheels right and left
on the
ground.
10.
Check
oil
level and refill
as
required.
11.
If oil is
extremely foamy, allow vehicle
to
stand
a
few minutes with engine
off and
repeat above
procedure.
,
a.
Check belt tightness
and
check
for a
bent
or
loose
pulley. (Pulley should
not
wobble with engine
running.)
b.
Check
to
make sure hoses
are not
touching
any
other parts
of the car,
particularly sheet metal.
c. Check
oil
level, filling
to
proper level
if
neces-
sary, following operations
1
through
10.
This
step
and
Step
"D" are
extremely important
as
low
oil
level and/or
air in the oil are the
most
frequent causes
of
objectionable pump noise.
d. Check
the
presence
of air in the oil. If air is
present, attempt
to
bleed system
as
described
in
operations
1
through
10. If it
becomes obvious
that
the
pump will
not
bleed after
a few
trials,
proceed
as
outlined under Hydraulic System
Checks.
FLUID
LEVEL
1.
Check
oil
level
in the
reservoir
by
checking
the dip
stick when
oil is at
operating temperature.
On
Chevelle models equipped with remote reservoir,
the reservoir should
be
maintained approximately
3/4 full when
oil is at
operating temperature.
2.
Fill,
if
necessary,
to
proper level with
GM
Power
Steering Fluid
or, if
this
is not
available, automatic
CHEVROLET CHASSIS SERVICE MANUAL
Page 474 of 659
STEERING 9-34
Fig.
64-Over Center Adjustment
transmission fluid "Type A" bearing the mark
"AQ-ATF" followed by a number and the suffix
letter "A".
ADJUSTMENTS
POWER STEERING GEAR
Chevrolet, Chevelle, and Camaro
The over-center adjustment (fig. 64) is the only power
steering gear adjustment which can be made on the car.
However, in order to make this adjustment, it is also
necessary to check the combined ball and thrust bearing
preload.
If the vehicle is equipped with a tilt column it will be
necessary to disconnect the steering coupling to obtain a
torque reading of the column. This torque should then be
subtracted from any reading taken on the gear.
1.
Disconnect the pitman arm from the relay rod.
2.
Loosen the pitman shaft adjusting screw loeknut and
thread the adjusting screw out to the limit of its
travel through the side cover. '. •
3.
Disconnect steering column harness at chassis wir-
ing connector plug.
4.
Remove horn button.
5.
Turn the steering wheel through its full travel, then
locate the wheel at its center of travel.
6. Gheck the combined ball and thrust bearing preload
with an inch-pound torque wrench on the steering
shaft nut by rotating through the center of travel
(approximately 1/4 turn in each direction). Note the
highest reading.
7.
Tighten the pitman shaft adjusting screw and check
torque at steering shaft nut until over center preload
and total steering gear preload falls within speci-
fications. Refer to torque specifications at rear of
manual for correct torque values.
8. Install horn button. Connect steering column harness
at wiring connector plug.
Chevy II and Corvette
The steering gear used with power steering is adjusted
in the same manner as the manual steering gear.
PUMP BELT TENSION
1.
Loosen nut on pivot bolt and pump brace adjusting
nut.
CAUTION: Do not move pump by prying against
reservoir or by pulling on filler neck.
2.
Move pump, with belt in place until belt is tensioned
to specifications as indicated by Tool J-7316 (Fig-.
65).
3.
Tighten pump brace adjusting nut. Then tighten pivot
bolt nut.
HYDRAULIC SYSTEM CHECKS
The following procedure outlines methods to identify
and isolate power steering hydraulic circuit difficulties.
This test is divided into two parts. Test number one
provides means of determining whether power steering
system hydraulic parts are actually faulty. If test number
one results in readings indicating faulty hydraulic opera-
tion, test number two will identify the faulty part. Be-
fore performing hydraulic circuit test, carefully check
belt tension and condition of driving pulley. Strand
tension of belt should be 125 lbs. on new belts and 75 lbs.
on old belts, as indicated by Tool J-7316 (Fig. 65).
Test Number One—Oil Circuit Open
Engine must be at normal operating temperature. In-
flate front, tires to correct pressure. All tests are made
with engine idling, so adjust engine idle speed to correct
specifications listed in Section 6 and proceed as follows:
a. With engine not running, disconnect flexible pres-
sure line from pump and install Tool J-5176 as
Fig.
65— Checking Belt Tension with Tool J-7316
CHEVROLET CHASSIS SERVICE MANUAL
Page 475 of 659
STEERING 9-35
Fig.
66—Power Steering Diagnosis
shown in Figure 66. Gauge must be between shut-
off valve and pump. Open shut-off valve,
b.
Remove filler cap from pump reservoir and check
fluid level. Fill pump reservoir to full mark on
dip stick. Start engine and, holding steering
wheel against stop, check connections at Tool
J-5176 for leakage. Bleed system as outlined
under Maintenance and Adjustments. Insert ther-
mometer (Tool J-5421) in reservoir filler open-
ing. Move steering wheel from stop to stop
several times until thermometer indicates that
hydraulic fluid in reservoir has reached tempera-
ture of 150° to 170°F.
CAUTION: To prevent scrubbing flat spots on
tires,
do not turn steering wheel more than five
times without rolling car to change tire-to-floor
contact area.
c. Hold steering wheel against a stop momentarily
and read pressure gauge. If the maximum pres-
sure is below specifications, a faulty hydraulic
circuit is indicated. To determine which part is
faulty, proceed with test number two.
Test Number Two—Oil Circuit Closed
a. Slowly turn shut-off valve on J-5176 to closed
position and read pressure indicated on gauge.
Quickly reopen valve to avoid pump damage, if
indicated pressure is less than specification,
pump output is below requirement and pump may
be considered faulty. If pressure indicated is
within specifications, it may be safely assumed
that the external hoses, connections, valve and
adapter or steering gear is at fault.
NOTE:
If pump proves faulty in test number
two,
test should be repeated after pump is re-
paired and installed in vehicle. This will provide
a means of checking the repairs made to the
pump and the condition of the steering gear or
valve and adapter which may also be faulty.
COMPONENT REPLACEMENT AND REPAIRS
POWER STEERING PUMP
Removal (Fig. 67)
1.
Disconnect hoses at pump. When hoses are discon-
nected, secure ends in raised position to prevent
drainage of oil. Cap or tape the ends of the hoses to
prevent entrance of dirt.
NOTE:
Chevelle with 396 engine uses a remote
reservoir. It is necessary to disconnect the
reservoir to pump hose before removing the
pump.
Hold a 1 qt. container under the reservoir
when the hose is removed to catch the fluid.
2.
Install two caps at pump fittings to prevent drainage
of oil from pump.
3.
Remove pump belt.
4.
On Corvette with 427 engine, loosen alternator ad-
justment and remove pump to alternator belt.
5. Remove pump from attaching parts and remove pump
from vehicle.
NOTE:
On Chevrolet and Chevy II equipped with
283 and 327 engine it may be necessary to re-
move pump brace.
6. Remove drive pulley attaching nut.
7. Remove pulley from shaft with Tool J-21239 (for
stamped pulleys) or Tool J-8433-1 with J-8433-2
adapter (for cast iron pulleys). Do not hammer
pulley off shaft as this will damage the pump.
Fig.
67—Power Steering Pump Mounting
CHEVROLET CHASSIS SERVICE MANUAL
Page 477 of 659
STEERING 9-37
NUT
Fig.
69—Control Valve Ball Stud Seal Replacement
(Service Type)
4.
Center the ball stud, seal and clamp at opening in
adapter housing, then install spacer, bolt and nut.
Removal
1.
Raise the front of the vehicle off the floor and place
it on stands.
2.
Remove the relay rod to control valve clamp bolt.
3.
Disconnect the two pump to control valve hose cdn-
nections and allow fluid to drain into a container,
then disconnect the two remaining valve to power
cylinder hoses.
4.
Remove the retaining nut from the ball stud to pitman
arm connection and disconnect the control valve
from the pitman arm.
5. Turn the pitman arm to the right clear of the control
valve and unscrew the control valve from the relay
rod.
6. Remove the control valve from the vehicle.
Installation
1.
Install the control valve on the vehicle by reversing
the removal procedure.
2.
Reconnect the hydraulic lines, fill the system with
fluid and bleed out air using the procedure outlined
under "Maintenance and Adjustments/' Grease ball
joint.
POWER CYLINDER (Fig. 70)
Chevy II and Corvette
Removal
1.
Disconnect the two hydraulic lines connected to the
power cylinder and drain fluid into a container. Do
not reuse.
2.
Remove cotter pin, nut, retainer and grommet from
power cylinder rod attached to the frame bracket.
3.
Also remove grommet and retainer from bracket if
replacement parts are required.
1.
Snap Ring
2.
End Plug and
Lube Fitting
3.
"O" Ring
Fig.
70—Power Cylinder—Exploded View
4.
Spring
5. Spring Seat
6. Ball Stud
7. Ball Seat
8. Ball Stud Seal
9. Piston Body
10.
Piston Rod Seal
11.
Backup Washer
•12.
Scraper Element
13.
Piston Rod Scraper
14.
Snap Ring
15.
Piston Rod
CHEVROLET CHASSIS SERVICE MANUAL
Page 479 of 659
STEERING 9-39
4.
Remove cotter pin, nut and ball stud at relay rod.
5. Remove the power cylinder from the vehicle.
Inspection
1.
Inspect the seals for leaks; if leaks are present,
replace the seals using the procedure outlined under
"Disassembly."
2.
Examine the brass fitted hose connection seats for
cracks or damage and replace if necessary.
3.
For service other than ball seat or seal replacement
and ball stud removal, replace the power cylinder.
4.
Check the frame bracket parts for wear.
Disassembly
1.
To remove the piston rod seal remove the snap ring;
then pull out on the rod, being careful not to spray
oil.
2.
Remove the piston rod scraper and scraper element,
back up washer and piston rod seal from the rod.
3.
At the ball stud end of the cylinder, remove the ball
stud seal.
4.
Remove the snap ring retaining the end plug with the
lube fitting.
5. Push on the end of the ball stud and remove the end
plug, spring, spring seat and ball stud.
6. Remove the "O" ring seal from the top lip of the
power cylinder ball stud opening.
7. If the ball seat is to be replaced, it must be pressed
out using Tool J-8937.
Assembly
1.
Reassemble the piston rod seal components by re-
versing the disassembly procedure. Apply a thin
coat of Lubriplate or equivalent on the inner sur-
faces of the seal and scraper before assembly.
2.
Reverse the disassembly procedure when reassem-
bling the ball stud.
3.
In each case be sure that the snap ring is securely,
seated in the ring groove.
Installation
1.
Install the power cylinder on the vehicle by reversing
the removal procedure.
2.
Reconnect the two hydraulic lines, fill the system
with fluid and bleed out air using the procedure out-
lined under "Maintenance and Adjustments." Grease
ball joint.
POWER STEERING HOSES
When servicing the power steering hoses be sure to
align the hoses in their correct position as shown in
Figure 71. On Chevelle models with 396 engine, install
the upper hose so that there is at least .6 inch clearance
between the hose and the Delcotron or the inner fender
skirt.
It is important that the power steering hoses be in-
stalled correctly. Hoses installed out of position may be
subjected to chafing or other abuses during sharp turns.
Always make hose installations with front wheels in
straight ahead position. Do not twist hoses unneces-
sarily during installation.
CAUTION: Do not start engine with any power
steering hose disconnected.
CHEVROLET CHASSIS SERVICE MANUAL