fluid CHEVROLET CAMARO 1967 1.G Chassis Service Manual

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

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

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

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

WHEELS AND TIRES 10-4

the road and it slips, grinding off the tread on the inside

half of the tire at an excessive rate. This type of tire

shows much the same appearance of tread wear as tire

wear caused by negative camber.

Second, the transfer of weight may also over-load the

outside tires so much that they are laterally distorted

resulting in excessive wear on the outside half of the

tire producing a type of wear like that caused by ex-

cessive positive camber.

Cornering wear can be most easily distinguished from

abnormal camber wear by the rounding of the outside

shoulder or edge of the tire and by the roughening of the

tread surface which denotes abrasion.

Cornering wear often produces a fin or raised portion

along the inside edge of each row in the tread pattern.

In some cases this fin is almost as pronounced as a

toe-in fin, and in others, it tapers into a row of tread

blocks to such an extent that the tire has a definite step

wear appearance.

The only remedy for cornering wear is proper in-

struction of owners.

Fig.
5 - Tire Rotatidh

Rotation

To minimize the possibility of tire noise and to equal-

ize tire wear, it is recommended that tires be inter-

changed every 6000 miles as shown in Figure 5 or more

frequently in the case of extremely heavy wear.

NOTE:
Rotate Corvette tires at 4000 miles or

sooner.

Interchanging tires will effectively prevent undue wear

on any particular tire. II tire interchanging is followed

as recommended above, all tires will have the same

number of miles in each wheel position at the end of the

fourth change. When interchanging tires, inspect for

signs of abnormal wear, bulging, etc., stones, glass, and

nails should be removed before reinstallation.

Noise

Noise caused by the normal action of tire treads on

various road surfaces is often confused with rear axle
gears or other noises in the car.

The determination of whether tires are causing the

noise complained of is relatively simple. The car should

be driven at various speeds and note taken of part

throttle, and sudden acceleration and deceleration. Axle

and exhaust noises show definite variations under these

conditions, while tire noise will remain constant. Tire

noise is, however, most pronounced at speeds of approx-

imately twenty or thirty miles per hour.

The tires may be further checked by driving the ear

over smooth pavement with the tires at normal pressure

and again over the same stretch of pavement when the

tires have been inflated to fifty pounds pressure. Reduce

the tires to normal pressure one at a time to determine

the faulty tire or tires. This high inflation pressure

should immediately be reduced to normal after test. If

the noise for which the test is being made is caused by

tires,.
it will noticeably decrease when the tire pressure

is increased, whereas axle noise should show no change

in volume.

If, on inspection, the tires on the front wheels are

found to be creating most of the noise the alignment of

the front wheels should be checked. Excessive tire noise

usually results from lower than recommended tire pres-

sure, incorrect alignment, uneven tire wear, or defective

(thumper) tire.

Cleaning

A great deal of ordinary road dirt which collects on

white sidewall tires may be sponged off with clear water

or a mild soap solution.

A good brand of whitewall tire cleaner, however, is

a quicker and more effective cleaner for removing dirt

and stains from whitewall tires and in many cases it

will remove stains and discoloration that the simpler

method of soap and water will not remove.

Under no circumstances should gasoline, kerosene or

any cleaning fluid containing a solvent derived from oil

be used to clean whitewall tires. Oil in any form is

detrimental to tire rubber and a cleaner with an oil base

will discolor or injure whitewall tires.

Change (W/Wheels)

To change the road wheels using the jack that comes

with the car, observe the following procedure:

1.
Set hand brake and block front wheels if rear wheel

is being changed.

2.
Remove hub cap or wheel disc and break wheel

mounting nuts loose.

3.
Place the jack as directed tinder, General Informa-

tion,
Section 0 and raise car until wheel clears

ground.

4.
Remove wheel mounting nuts and remove wheel from

hub or drum.

5. To replace road wheel, reverse the above instrue-

. tions. Proper torque on nuts is 55-75 ft. lbs.

torque (70-85 ft. lbs. for Corvette aluminum wheel

nuts).

CAUTION: On models equipped with discs, in-

dex the pilot hole in the disc on the valve stem.

(To insure that the anti-rotation notches in wheel

disc register on lugs in wheel rim.)

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY
AND
CHASSIS
12-66

R.H. PARK

&DIR.
SIG. LP

L.H. PARK

& DQU SIG.
LP,
GROUND
TO

FENDER REINF

BRAKE FLUID

ill WARNING SW.

Fig.
109 - Front Lighting and Engine Compartment — (Chevelie)

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-74

R.H. PARK&

DIR. SIG. LAMP

\L2 BRNf

18 Y—

12 BRN

18 LBL4-

18DBL

12 P

18 LG

18 P

DASH

PANEL

RESISTOR
TEMP.

SENDER

R.H. LIMIT SW.

L.H. LIMIT SW.

GY/B,

16 DBL

BRK FLUID

WARNING

16
W

20 OR

20 B
BACK-UP

LMP.
SW,

20 B

16 B/W

18 T
NEU.

SFT.

SW. I

RPO

M35

4BRN/W

16 B

M18DG

4 OR
DIR. SIG.
&
DIR.

SIG. LAMP

Fig. 117 - Front Lighting & Engine Compt — Corvette

CHEVROLET CHASSIS SERVICE MANUAL