1967 CHEVROLET CAMARO oil pressure

CORVETTE BODY 1B-52

and pull weatherstrip and trim from rear bow.

Section A-A shows installed position of these com-

ponents. Refer also to figure 105.

installation

1.
Find and mark center of header, #3 bow, rear bow

and leading and trailing edges of top trim. Align

these marks during installation and recheck their

alignment from time to time while installation is in

progress, especially during tacking or stapling.

2.
Assemble top trim and weatherstrip to rear bow,

referring to Section A-A and Figure 105. Note that

filler strip locks this assembly together and goes

in last. Align center marks.

3.
If new pads are required, install at this time, align-

ing with marks made when old pads were removed.

Figure 106 shows pad construction; Figure 107 shows

pad installed.

4.
Install top trim-rear bow assembly on top frame

with four screws removed at disassembly.

5.
Lock down rear bow in desired "top up" position.

Pull up stay straps and staple or tack to #3 bow

(fig. 108).

6. Pull leading edge of trim iip to header and align

center marks. Smooth out fabric and clamp, tack

or staple temporarily to header.

7.
Draw window extension up to #3 bow, aligning cen-

tering marks. Turn an ample amount of fabric under

and tack to #3 bow. Apply neoprene trim cement,

GM Part #3695016 or equivalent, to area shown in

View D of Figure 102. Follow directions on package.

8. Draw roof portion of trim over #3 bow, align marks

and tack on staple.

9. Trim off excess material and install wire-on binding

as shown in Figure 109 and View D of Figure 102.

Install binding caps.

10.
Remove temporary clamps or fastenings holding trim

to header.

11.
With header locked down, pull trim assembly up tight

and mark for final installation.

12.
Apply trim cement to header and rear side rail.

13.
Release header from windshield. Tack or staple trim

to header (fig. 103).

14.
Apply trim to rear side frame, previously cemented.

15.
Install weatherstrips which were removed at dis-

assembly and install retaining screws in header

weatherstrip.

16.
Make any adjustments necessary, following instruc-

tions listed under Folding Top—Adjustments.

FRAME AND LINKAGE

Figure 110 illustrates construction features of the

folding top frame and linkage. Various cross sections in

Figure 110 show the pivoting joints and their assembly.

If an operation is being performed which requires

removal of folding top trim, follow directions in this

section. The entire frame assembly may be removed and

replaced as a unit. Follow instructions for Folding Top

Trim and Rear Window Assembly and Top Assembly—

Removal and Installation.

The pivoting joints should be lubricated with light

machine oil once a year. Apply oil sparingly so as not

to stain top trim.
WEATHERSTRIP

Side Rail Weatherstrip

Figure 111 illustrates installation of side rail weather-

strip which acts to seal window opening. The weather-

strip is held in place by studs which are part of the

weatherstrip assembly, and by neoprene base cement

which is applied between weatherstrip and side rail

surface.

When replacing weatherstrip remove all rust, old

cement and foreign material from the surfaces to be

cemented, to assure successful bonding. Use only good

quality neoprene cement suitable for weatherstrip

application.

Header Weatherstrip

Weatherstrip assembly is retained to the header panel

by a combination of studs, sheet metal screws and special

fasteners as shown in Figure 112, along with neoprene

base weatherstrip cement.

Figure 99 shows' a cross section of weatherstrip taken

through a special fastener. To replace fastener, rotate

ninety degrees to align fastener head with slot. Follow

directions for cementing in the Side Rail Weatherstrip

instructions preceding this write up.

ADDING HARDTOP (ROOF PANEL ASSEMBLY)

An available roof panel assembly (hardtop) complete

can be added to convertible model Corvettes. The hard-

ware is included with the panel assembly.

Reworking of a plastic part (one for each side of the

roof panel) can be used as a marker for drilling of two

required holes in the folding top compartment lid* Hard-

ware is attached at four locations — two on the lid and

two (one each side) at the lock pillar area as follows:

1.
Rework two plastic retainers (#6280765) (used on

Chevrolet and Corvair door inner panels for trim

retention) as shown by Figure 113.

2.
Slide the reworked plastic retainers into the bolt re-

tainer slots on each side of the hardtop rear bow

(position plastic tip inboard).

3.
Mark the hardtop reveal molding at the approximate

location of the two plastic retainers,

4.
Mark the tips of the two plastic retainers with a

china marker pencil.

5.
Close the soft top compartment lid.

6. With aid of an ^assistant, position front of hardtop

onto header and lower onto vehicle. Do not fasten

latches at windshield header.

7.
Apply hand pressure at reveal molding marks.

8. Mark roof panel attachment hole location at each

lock pillar area (fig. 114).

9. With aid of an assistant, lift roof panel straight up

off body and set roof panel aside.

10.
Mark the drill position at the four china marks with

a center punch.

11.
Place a 2" x 4" board under the top compartment lid

to prevent drill damage to folding top material. Make

certain the compartment lid is securely locked

before drilling.

12.
Drill 1/8" pilot hole at the 4 marked locations.

CHEVROLET CHASSIS SERVICE MANUAL

FRONT SUSPENSION 3-16

available the following procedure may also be

used (fig. 22-Alternate Method).

1.
Support car on suitable hoist or jack (so control

arms may swing free) and remove the wheel and

tire assembly, shock absorber, and stabilizer link

at control arm.

2.
Place suitable jack stand under the lower control

arm cross shaft.

3.
Follow Steps 2-5 as outlined on previous page.

4.
Turn head of tool screw to partially compress

spring.

5. Remove the three control arm cross shaft attaching

bolts,
washers and nuts.

6. Carefully lower jack stand and if necessary increase

compression on spring and when coil spring is out of

its upper seat, relax tension on spring (fig. 22).

7. By using a pry bar to assist, if necessary, remove

the coil spring from the lower control arm.

8. Installation is the reverse of the above procedure.

Carefully follow instructions for installing spring

tool.

LOWER CONTROL ARM SPHERICAL JOINT

Chevrolet, Chevelle, Comoro and Corvette

Inspection

The lower control arm spherical joint should be re-

placed whenever wear is indicated in the upper joint

inspection.

NOTE: The lower control arm spherical joint

is a loose fit in the assembly when not connected

to the steering knuckle.

Only if inspection of each upper joint indicates them

both to be within limits, inspect each lower joint for ex-

cessive wear as follows:

1.
After reconnecting upper joints to steering knuckles,

support vehicle weight on wheels or wheel hubs.

2.
With outside micrometer or caliper, measure dis-

tance from top of lubrication fitting to bottom of ball

stud, and record the dimensions for each side.

3.
Then support vehicle weight at outer end of each

lower control arm, so that wheels or wheel hubs are

free,
then repeat Step 2.

4.
If the difference in dimensions on either side is

greater than 1/16" (.0625"), the joint is excessively

worn and both lower joints should be replaced.

If inspection of lower spherical joints does not indicate

excessive wear, inspect further as follows:

5.
On Chevrolet Only--Examine lubrication hole in each

joint assembly after cleaning out hole. Look for evi-

dence of the liner partially or fully blocking lubrica-

tion opening. Such evidence indicates that liner is

disintegrating and that both lower spherical joints

should be replaced.

Another indication of lower spherical joint excessive

wear is indicated when difficulty is experienced when

lubricating the joint. If the liner has worn to the point

where the lubrication grooves in the liner have worn

away, then abnormal pressure is required to force lubri-

cant through the joint. This is another reason to recom-

mend replacement of both lower joints.

If the above inspections do not indicate any reason for

spherical joint replacements, test the torque tightness of
Fig. 27 - Removing Lower Ball Joint - Chevelle
&
Camaro

the lower ball stud in the knuckle on each side as follows:

1.
Wire-brush off nut and cotter pin attaching spherical

joint ball stud to steering knuckle and examine for

evidence of looseness of stud in knuckle.

2.
If no evidence of looseness, remove cotter pin and

with prick punch or equivalent, mark nut stud and

knuckle to identify relative location.

3.
Tighten nut as installed and observe torque reading.

If less than 45 lbs. ft., stud may have been loose in

steering knuckle and replacement of both lower

spherical joints may be recommended.

4.
Check to see if torque of 60-94 lbs. ft. can be ob-

tained without bottoming stud or ball joint against

knuckle. If bottoming occurs, replace ball joint or

steering knuckle.

Chevrolet and Corvette

Removal

1.
Support lower control arm at outer end on floor jack,

with hoist or jack pad clear of lower ball stud nut.

2.
Remove upper and lower ball stud nuts, free ball

studs from steering knuckle and wire knuckle and

brake drum assembly up to fender skirt to preclude

interference while performing next step.

3.
Being careful not to enlarge the holes in control arm,

cut off rivets.

Installation

1.
Install new joint against underside of control arm and

CHEVROLET CHASSIS SERVICE MANUAL

REAR SUSPENSION AND DRIVE LINE 4-7

tioned vertically in the torque arm before ap-

plying pressure to the puller screw.

5.
Remove shim and bearing spacer from spindle

support.

6. Note size of shim used. If dial indicator reading

was more than
.008",
select a shim thinner by the

amount needed to bring end play within limits. If

dial indicator reading was less than
.001",
select a

shim thicker by the amount needed to bring end play

within limits.

NOTE: Shims are available in thicknesses from

.097"
to .148" in increments of
.003".

EXAMPLE: Bearing end play reading obtained

on dial indicator was
.011",
.003" over limit.

Bearing shim removed from spindle measures

.145".
New shim installed measures .139", .006"

smaller. End play is now decreased by .006" and

is
.005",
which is within the .001" to .008" limit.

7.
After determining shim thickness, install bearing

spacer and shim on spindle. Position spindle in

spindle support.

8. Press inner bearing race and roller assembly on

spindle as follows.

a. Position Tool J-4731 over spindle and against

bearing inner race.

b.
Position washer and spindle nut on spindle and

proceed to tighten nut until bearing is forced on

spindle sufficiently to allow spindle drive flange

to be installed (fig. 13). Remove spindle nut,

washer and Tool
J-4731.
Discard nut and use a

new one for final assembly.

9. Position drive flange over spindle, making sure

flange is aligned with spindle splines. Install washer
Fig.
13—Installing Drive Spindle to Support (Corvette)

and nut on spindle then tighten nut to specifications

and install cotter pin. If specified torque does not

permit cotter pin insertion, tighten nut to next flat.

10.
Seat spindle support outer seal in bore by using

screw driver, or other suitable tool, to press against

metal portion of seal.

11.
Install brake disc and caliper. Refer to Section 5

for details of brake disc and caliper installation.

12.
Install axle drive shaft, wheel and tire assembly,

adjust camber cam to original position and torque

all components to specifications.

COMPONENT PARTS REPLACEMENT

(Chevrolet, Chevelle, Chevy II and Camaro)

COIL SPRING

Chevrolet

Removal

To remove either or both rear coil springs proceed

as follows.

1.
Raise rear of vehicle and place jack stands under

frame. Support vehicle weight at rear, using either

a jack or post of twin-post hoist under axle.

2.
Remove both rear wheels from vehicle.

3.
With the car supported as in Step 1, so that the rear

springs are compressed by weight of vehicle; per-

form the following:

a. Disconnect both rear shock absorbers from the

anchor pin lower attachment.

b.
Loosen the upper control arm(s) rear pivot bolt

(do not remove the nut).

C. Loosen both the left and the right lower control

arm rear attachment (do not disconnect from axle

brackets).

d. Remove the rear suspension tie rod from the

stud on the axle tube.

4.
At the lower seat of both rear coil springs, slightly

loosen the nut on the bolt that retains the spring and

seat to the control arm. When the nut has been

backed off the maximum permissible, all threads of
the nut should still be engaged on the bolt.

CAUTION: Under ,no condition should the nut,

at this time, be removed from the bolt in the

seat of either spring.

5.
Slowly lower the support (jack or hoist post) that has

been in place under the rear axle, thereby allowing

the axle to swing down, carrying the springs out of

their upper seat and providing access for spring

removal.

6. Remove the lower seat attaching parts from each

spring, then remove the springs from the vehicle

(fig. 14).

Installation

1.
Position the springs in their upper seat so that end

of top coil is 3/8" ± 1/8" from end of stop. Install

the lower seat parts on the control arm, with the nut

finger tight on the spring retainer bolt.

NOTE: Omit the lock washer under the special

high carbon bolt, so that sufficient bolt thread

will be available to start the nut. The lock

washers will be installed later (in Step 4).

2.
By alternately raising the axle slightly and then

re-snugging the nut on each spring lower seat bolt,

move the axle upward until vehicle weight is fully

CHEVROLET CHASSIS SERVICE MANUAL

REAR SUSPENSION AND DRIVE LINE 4-15

ship of parts, then install Spacer J-
7574-
3 over

the partially installed bushing and between the

sides of the control arm.

f. Continue to tighten J-
21058-
8
until bushing is

pulled flush against control arm. Do not exert

undue force against control arm after bushing is

installed. Overtightening of J-21058-
8
will cause

damage to walls of control arm.

g. Disassemble tools and inspect bushing for proper

installation.

Replace the rear bushing as follows:

a. Position Puller Screw J-21058-8 through Re-

mover Adapter J-21830-2 so that head of screw

is opposite button end of remover. Install this

assembly, threaded end of sc'rew first, through

bushing to be removed.

b.
Install Receiver J-21830-4 and Bridge J-21830-7

. over screw and against control arm. Position

thrust bearing against J-21830-7 and screw

J-21058-8 snugly against bearing. Install Spacer

J-
2183d-
3
between sides of control arm and over

bushing.

c. Check tool installation for proper alignment and

tighten J-21058-8 to withdraw bushing from con-

trol arm. Refer to Figure 35 for installed view

of tools.

d. Disassemble tools and position Installer Adapter

J-21830-2 on flanged end of new bushing. Posi-

tion bushing in control arm making sure of cor-

rect installation. Small end of bushing will pass

through one side of arm without any interference.

e. Install J-21830-4, J-21830-7, thrust bearing and

J-21058-8 on threaded end of J-21058-15 as

shown in Figure 36. Tighten J-21058 to main-

tain proper relationship of parts; then position

Spacer J- 21830- 3 over bushing and between sides

of control arm.

f. Tighten J-21058-8 until bushing is fully seated
J-21058-8 J-21830-7 J-21830-4 J-21830-3 J-21830-2

\

J-2K

X
D58-8
J-218
30-7

IP

•he?

21830-4
J-21830-2

JfSir

J-21830-3

Fig.
35—Lower Control Arm Rear Bushing Removal

(Chevrolet)
Fig.
36—Lower Control Arm Rear Bushing Installation

(Chevrolet)

against side of control arm. Do not apply undue

pressure to J-21058 after bushing is seated--to

do so may cause permanent distortion to control

arm.

g. Disassemble tools and check bushing for proper

installation.

Installation

NOTE:
Make sure control arm is reinstalled

in proper forward attaching position. Reinstall

in same hole as noted during removal. Top

attaching hole is used for all installations except

station wagons and heavy-duty suspension (RPO

F41).
Opposite arm must be installed in cor-

responding position.

1.
Position the control arm between the mounting

brackets and loosely install the pivot bolt retaining

nuts in the proper position.

2.
Install spring and shock absorber as outlined in this

section.

3.
Lower vehicle so that weight is placed on sus-

pension components and torque all affected parts to

specifications.

Chevelle Upper and Lower

Removal

NOTE:
If both upper control arms and both

lower control arms are to be removed at the

same time, remove both coil springs as outlined

under "Coil Spring Removal".

1.
Raise vehicle to a height that will allow axle assem-

bly to hand freely and position supports under both

frame side rails.

2.
Support axle assembly with an adjustable lifting de-

vice and raise rear axle assembly until tension is

relieved in control arm being removed.

3.
Disconnect control arm at forward and rearward

attaching points and remove from vehicle.

Bushing Replacement

The upper arm front bushing and carrier ear bushings

are of the same part number and are interchangeable.

CHEVROLET CHASSIS SERVICE MANUAL

REAR SUSPENSION AND DRIVE LINE 4-32

HP?

Fig.
81
—Whed Bearing and/or Oil Seal Installation

4.
Install brake components on flange and connect

hydraulic line to wheel cylinder inlet. See Section 5

for brake assembly procedure.

5. Install axle shaft, brake drum and wheel and tire

assembly.

6. Bleed and. adjust brakes as outlined in Section 5.

Installation

1.
Slide axle shaft into place.

CAUTION: Exercise care that splines on end

of shaft do not damage oil seal and that they

engage with splines of differential side gear/

2.
Install axle shaft "C" lock on button end of axle-

shaft and push shaft outward so that shaft lock seats

in counterbore of differential side gear.

3.
Position differential pinion shaft through case and

pinions, aligning hole in shaft with lock screw hole.

Install lock screw and torque to specifications.

4.
Using a new gasket, install carrier cover and torque

bolts to specifications.

CAUTION: Make sure both gasket surfaces on

carrier and cover are clean before installing

new gasket. Torque carrier cover bolts in a

crosswise pattern to ensure uniform draw on

cover gasket.

5. Fill axle with lubricant to a level even with bottom

of filler hole. See Section 0 for proper lubricant.

6. Install brake drum and wheel and tire assembly.

7. Lower vehicle and test operation of axle.

PINION FLANGE, DUST DEFLECTOR

AND/OR OIL SEAL

Replacement

1.
Raise rear of vehicle and place stand jacks under

frame side rails so that axle hangs freely to allow

sufficient working room.

2.
Check wheels for freedom of rotation.

3.
Separate rear universal joint, tape trunnion bearings

to joint, position propeller shaft to one side and tie

it to frame side rail.

4.
Using Tool J-5853 with Adapter J-5810 and a suitable

socket on the pinion flange nut, rotate the pinion

through several complete revolutions and record the

torque required to keep the pinion turning (fig. 82).

If flange is to be reused, mark pinion and flange for

reassembly in the same relative position.

5. Install Tool J-8614-1 on pinion flange and remove

pinion flange nut and washer (fig. 83). (Position
Fig. 82—Measuring Drive Pinion Bearing Preload

J-8614-1 on flange so that the four notches are

toward flange.) Discard nut and use a new one

upon reassembly.

6. Thread pilot end of Tool J-8614-3 into small O.D.

end of J-8614-2. Then with J-8614-1 installed as

in Step 4, insert J-8614-2 into J-8614-1 and turn

it 45 degrees to locked position. Remove flange by

turning J-8614-3 while holding J-8614-1 (fig. 84).

7. Pry old seal out of bore, using a screw driver or a

hammer and chisel.

8. Inspect pinion flange for smooth oil seal surface,

worn drive splines, damaged ears, and for smooth-

ness of bearing contact surface. Replace if

necessary.

9. If deflector requires replacement, remove by tapping

from flange, clean up stake points; install new de-

flector, and stake deflector at three new equally

spaced positions.

NOTE:
Staking operation must be performed

in such a manner that the seal operating surface

is not damaged.

1.0. Pack the cavity between the seal lips of the pinion

flange oil seal with a lithium-base extreme pressure

lubricant, position seal in bore, then using Tools

J-21468 and J-9458, for light-duty axle and Tool

Fig. 83-—Drive Pinion Nut Removal

CHEVROLET CHASSIS SERVICE MANUAL

REAR SUSPENSION AND DRIVE LINE 4-33

Fig.
84—Drive Pinion Flange Removal

J-21057 for heavy-duty axle, press seal into bore

until it seats against shoulder (figs. 85 and 86).

CAUTION: Pinion oil seal flange must not bot-

tom against "carrier. Press seal into carrier

bore until it seats against internal shoulder -

do not apply unnecessary pressure after seal is

seated. To do so will destroy rubber seat ancl

distort seal. ;

11.
Position and align pinion flange on pinion shaft using

Tools J-9458 and
J-8614-1.
Tool J-9458-1 is

threaded onto pinion shaft and nut tightened against

J-9458-2 to pull flange on shaft (fig. 87). Remove
Fig.
86—Drive Pinion Flange Oil Seal

Installation (Heavy-Duty)

J-9458 after flange is seated.

NOTE: The position of the pinion and flange

was previously marked so that reinstallation

may be made with flange and pinion in same

relative position.

CAUTION: Do not attempt to hammer flange

onto pinion shaft. To do so will damage ring

gear and pinion.

12.

13.

14.

15.
Pack the cavity between end of pinion splines and

pinion flange with a non-hardening sealer (such as

Permatex Type A) prior to installing washer and

nut on pinion.

Install washer and a new self-locking nut on pinion

shaft. Tighten nut to remove end play and continue

alternately tightening in small increments and check-

ing preload with torque wrench until it is the same

as that recorded in Step 4.

Reassemble the rear universal joint, and torque

"V" bolt nuts to specifications.

Lower vehicle to floor and road test for leaks.

Fig.
85—Drive Pinion Flange Oil Seal

Installation (Light-Duty)
Fig.
87—Drive Pinion Flange Installation

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES
5-3

PRIMARY

SHOE

PAWL
WIRE LINK

OVERRIDE

LEVER

VERRIDE

SPRING

RETURN

SPRING

STAR
WHEEL

Fig.
3—Camaro
Pressure
Regulator
Valve
Fig.
4-Self-Adjusting
Brake

MAINTENANCE AND ADJUSTMENTS

In any service operation it is extremely important

that absolute cleanliness be observed. Any foreign matter

in the hydraulic system will tend to clog the lines, ruin

the rubber cups of the main and wheel cylinders and

cause inefficient operation or even failure of the braking

system. Dirt or grease on a brake lining may cause

that brake to grab first on brake application and fade

out on heavy brake application.

The split system consists basically of two separate

brake systems. When a failure is encountered on either,

the other is adequate to stop the vehicle. If one system

is not functioning, it is normal for the brake pedal lash

and pedal effort to substantially increase. This occurs

because of the design of the master cylinder which

incorporates ah actuating piston for each system. When

the rear system loses fluid and takes in air, its piston

will bottom against the front piston. When the front

system loses fluid and takes in air, its piston will

bottom on the end of the main cylinders body. The loss

of fluid in one of the systems causes an uneven hydraulic

pressure balance between the front and rear systems.

The brake pipe distribution and switch assembly, near

the main cylinder, detects the loss of pressure and il-

luminates the brake alarm indicator light on the instru-

ment panel. The pressure loss is felt at the brake pedal

by an apparent lack of brakes for most of the brake

travel and then, when failed chamber is bottomed, the

pedal will harden.

HYDRAULIC BRAKE FLUID

Use GM Hydraulic Brake Fluid, Supreme No. 11 or

equivalent when servicing brakes. This brake fluid is

satisfactory for any climate and has all the qualities

necessary for proper operation, such as a high boiling

point to prevent vapor lock and the ability to remain

fluid at low temperatures.
In the event that improper fluid has entered the system,

it will be necessary to service the system as follows:

1.
Drain the entire system.

2.
Thoroughly flush the system with clean alcohol,

188
proof,
or a hydraulic system cleaning fluid

such as "Declene".

3.
Replace all rubber parts of the system, including

brake hoses.

4.
Refill the system.

5. Bleed the system.

BLEEDING HYDRAULIC SYSTEM

The hydraulic brake system must be bled whenever

any line has been disconnected or air has in some way

entered the system. A ''spongy" pedal feeling when the

brakes are applied may indicate presence of air in the

system. The system must be absolutely free of air at

all times. Bleeding should be done on the longest line

first; the proper sequence to follow is left rear, right

rear, right front, and left front (fig. 5). Bleeding of

brake system may be performed by one of two methods—

either pressure or manual.

PRESSURE
BLEEDING

1.
Clean all dirt from top of main cylinder and remove

cylinder cover and rubber diaphragm.

2.
Reduce fluid level in main cylinder until reservoirs

are approximately half full.

NOTE:
Make sure brake fluid in bleeder equip-

ment is at operating level and that the. equipment

is capable of exerting 30 to 50 lbs. hydraulic

pressure on the brake system.

3.
Install brake bleeder adapter J-22489 (fig. 6) on

main cylinder. Connect hose from bleeder equipment

to bleeder adapter and open release valve on bleeder

equipment.

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES 5-17

mended shoe and lining assemblies. Otherwise,

serious fade or failure may occur.

1.
Inspect new linings and make certain there are no

nicks or burrs on bonding material on shoe edge

where contact is made with brake flange plate or

on any of the contact surfaces.

NOTE: Keep hands clean while handling brake

shoes.
Do not permit oil or grease to come in

contact with linings.

2.
If working on rear brakes, lubricate parking brake

cable.

3.
On rear brakes only, lubricate fulcrum end of park-

ing brake lever and the bolt with brake lube, then

attach lever to secondary shoe with bolt, spring

washer, lock washer and nut. Make sure that lever

moves freely.

4.
Before installation make certain the adjusting screw

is clean and lubricated properly.

NOTE: Loose adjustment may occur from an

adjusting screw that is not properly operating.

If the lubrication in the adjusting screw as-

sembly is contaminated or destroyed, the ad-

justing screw should be thoroughly cleaned and

lubricated.

5.
Connect brake shoes together with adjusting screw

spring, then place adjusting screw, socket and nut

in position.

CAUTION: Make sure the proper adjusting

screw is used ("L" for left side of vehicle,

"R"
for right side of vehicle). The star wheel

should only be installed with the star wheel

nearest to the secondary shoe and the adjusting

screw spring inserted to prevent interference

with the star wheel.
6. On rear wheels connect parking brake cable to lever.

7.
Secure the primary brake shoe (short lining—faces

forward) first with the hold-down pin and spring

using a pair of pliers. Engages shoes with the wheel

cylinder connecting links.

8. Install and secure the actuator assembly and second-

ary brake shoe with the hold-down pin and spring

using a pair of needle nose pliers. On rear wheels

position parking brake strut and strut spring.

9. Install guide plate over anchor pin.

10.
Install the wire link.

NOTE: Do not hook the wire link over the

anchor pin stud with the regular spring hook

tool. This may damage the cylinder boot seals.

Fasten the wire link to the actuator assembly ;

first, then place over the anchor pin stud by

hand while holding the adjuster assembly in the

full down position.

11.
Install actuator return spring.

NOTE: Do not pry actuator lever to install re-

turn spring. Ease it in place using the end of a

screw driver or other suitable flat tool.

12.
If old brake pull back (return) springs are nicked,

distorted or if strength is doubtful, install new

springs.

13.
Hook springs in shoes using Tool J-8049 by in-

stalling the primary spring from the shoe over the

anchor pin and then spring from secondary shoe

over the wire link end.

14.
Pry shoes away from backing plate and lubricate

shoe contact surfaces with a thin coating of brake

lube (fig. 29).

CAUTION:

facings.
Be careful to keep lubricant off

Fig.
29—Backing Plate Contact Surfaces
15.
After completing installation, make certain the actu-

ator lever functions easily by hand operating the

self-adjusting feature (fig. 30).

1.6. Follow the above procedure for all wheels.

17.
Adjust the service brakes and parking brake as

outlined under "Maintenance and Adjustments" in

this section.

Metallic Linings

Metallic brake linings which use special heat resistant

brake springs are available as an option. Service opera-

tions are the same as for standard brakes; however,

when new linings are installed, the linings should be

seated as described below.

NOTE: Brake shoes with metallic linings re-

quire specially finished brake drums (honed to a

20 micro-inch finish). Metallic linings are not

recommended for service replacement on ve-

hicles with standard brake drums that have not

been honed to specified finish.

Seating Metallic Linings

After the brakes have been adjusted, the following

recommended "lining seating" is as follows:

1.
Make six to eight stops from 30 MPH with moderate

pedal pressure to aid in seating and to mbdulate

any tendency to dive.

CHEVROLET CHASSIS SERVICE MANUAL