CHEVROLET CAMARO 1967 1.G Chassis Workshop Manual

BRAKES 5-8

Fig.
17—-Checking Brake Shoe Lining Clearance

Using Tool J-21177

b.
Turn the tool to the opposite side and fit over

the brake shoes by turning the star wheel, until

the gauge just slides over the linings (fig. 17).

c. Rotate the gauge around the brake shoe lining

surface to assure prpper clearance.

Alternate

a. Using the brake drum as an adjustment fixture

turn the star wheel until the drum slides over

the brake shoes with a slight drag.

b.
Turn the star wheel 1-1/4 turns to retract the

shoes.
This will allow sufficient lining-to-drum

clearance so final adjustment may be made as

described in Step 4.

3.
Install the drum and wheel.

NOTE: 1: If lanced area in brake drum is

knocked out, be sure all metal has been re-

moved from brake compartment. Install new

hole cover in drum to prevent contamination

of the brakes.

NOTE: 2: Make certain when installing drums

that drums are installed in the same position

as when removed with the drum locating tang

in line with the locating hole in the wheel hub

(fig. 18).

4.
Make final adjustment by making numerous forward

and reverse stops, applying brakes with a firm

pedal effort until a satisfactory brake pedal height

results.

NOTE: Frequent usage of an automatic trans-

mission forward range to halt reverse vehic;..$

motion may prevent the automatic adjuster.:?

from functioning, thereby inducing low pedal

heights.
Fig.
.18—Aligning Drum Tang with Wheel Hub

Parking Broke

The rear brake assemblies serve a dual purpose in

that they are utilized both as a hydraulically operated

service brake and also as a mechanically operated

parking brake. In view of this dual purpose, the service

brake must be properly adjusted as a base for parking

brake adjustment; conversely the parking brake must

be properly adjusted for the service brake to function

as intended.

Adjustment

1.
Jack up both rear wheels.

2.
Apply parking brake, two notches from fully re-

leased position.

3.
Loosen the equalizer forward check nut, and tighten

or loosen the rear nut until a light to moderate drag

is felt when rear wheels are rotated.

4.
Tighten check nuts securely.

5.
Fully release parking brake and rotate rear wheels;

no drag should be present.

Inspection

If complete release of the parking brake is not ob-

tained, unless it is forcibly returned to its released

position, or if application effort is high, check parking

brake assembly for free operation. If operation is sticky

or a bind is experienced, correct as follows:

1.
Clean and lubricate brake cables and equalizer.

2.
Inspect brake assembly for straightness and align-

ment (replace if necessary).

3.
Clean and lubricate parking brake assembly.

4.
Check routing of cables for kinks or binding.

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES 5-9

COMPONENT REPLACEMENT AND REPAIRS

PARKING BRAKE-CHEVROLET, CHEVELLE AND

CAMARO (Figs. 19 and 20)

Pedal Assembly

Removal

NOTE:
Remove positive cable from battery to

eliminate the possibility of creating short cir-

cuits under dash.

1.
Place parking brake pedal in released position.

2.
Remove equalizer check nut, and separate cable

stud from equalizer.

3.
Remove two attaching nuts from mounting studs

located in engine compartment.

4.
Remove front cable .ball end from pedal assembly

swivel.

5. Remove pedal assembly to dash brace attaching

screw.

6. Remove pedal assembly by lowering rear slightly

to avoid scratching dash, and pulling, it out of the

firewall.

Installation

1.
Place pedal assembly in position with the two mount-

ing studs protruding through the holes provided in

the firewall.

2.
Install and tighten pedal assembly to dash brace

attaching screw.

3.
Position front cable ball end into pedal assembly

swivel.

4.
Install and tighten two attaching nuts on mounting

studs located in engine compartment.

5. Place
,
equalizer in position on center cable and

insert front cable stud through equalizer and secure

with check nut.

6. Adjust parking brake as outlined under Maintenance

and Adjustments in this section.

7. Connect positive battery cable.

Front Cable

Removal

NOTE:
Remove positive cable from battery to

eliminate the possibility of creating short cir-

cuits under dash.

1.
Place parking brake pedal in released position.

2.
Remove equalizer check nut, and separate cable

, stud from equalizer.

3.
Remove retainer from cable assembly at inner side

of frame rail.

4.
Remove ball end of cable from pedal assembly

swivel.

5. Compress expanded conduit locking fingers at toe

pan arid withdraw cable from car.

6. On Chevelle, if necessary, remove rubber tube

from front cable.

Installation

1.
On Chevelle, if necessary, replace rubber tube

over front cable.

2.
Position cable ball and conduit tip through cutout

in firewall. Make sure conduit locking fingers are

fully expanded and secured in cutout, then position

cable ball into pedal assembly swivel.
3.
Feed stud end of cable through frame rail and se-

cure with retainer on inner side of frame.

4.
Place one check nut on cable stud and insert stud

through equalizer, (make sure center cable is in

position), then place second check nut on stud.

5. Adjust parking brake as outlined in this section.

6. Connect positive battery cable.

Center Cable

Removal

1.
Place parking brake pedal in released position.

2.
Remove equalizer check nut and remove equalizer

from cable.

3.
Remove cable from cable guides.

4.
Disconnect center cable from rear cables at

connectors.

Installation

1.
Install cable ends into rear cable connectors.

2.
Place cable through equalizer and install equalizer

on to front cable stud, secure with check nut. (Do

not tighten.)

3.
Install cable in cable guides (figs. 19 and 20),

4.
Adjust parking brake as outlined in this section.

Rear Cables

Removal

1.
Place parking brake pedal in released position.

2.
Remove equalizer check nut and remove equalizer

from cable.

3.
Remove rear cable from connector.

4.
Remove retainer from rear cable at frame bracket.

Pull cable out of bracket.

5. Remove rear brake drum as outlined in this section.

6. Remove rear brake shoes as outlined in this section.

7. Remove cable end from parking brake actuating

lever.

8. Compress expanded conduit locking fingers at flange

plate entry hole and withdraw cable.

Installation

1.
Pass end of cable and conduit tip through flange

plate entry hole, making sure that conduit locking

fingers all expand fully.

2.
Connect cable end to actuating lever.

3.
Install rear brake shoes, drum and wheel as out-

lined in this section.

4.
Pass cable through frame bracket and install

retainer.

5. Install cable end into cable connector.

6. Position equalizer on center cable and place on

front cable stud, secure with check nut.

7. Make sure all center cable guides are in place

and adjust parking brake as outlined in this section.

PARKING BRAKE-CHEVY II (Fig. 21)

Lever Assembly

Removal

NOTE:
Remove positive cable from battery

to eliminate possibility of creating short cir-

cuits under dash.

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES 5-10

\

Fig.
19—Parking Brake System-Chevrolet and Chevelle

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES 5-11

VIEW A

VIEWB

CAMARO

Fig.
20—Parking Brake System—Camano

1.
Place parking brake lever in released position.

2.
Remove return spring at equalizer.

3.
Remove equalizer check nut, and separate cable

stud from equalizer.

4.
Remove clevis pin clip and pin from idler lever

assembly.

5. Remove two lever dash attaching screws, and remove

lever assembly from vehicle.

Installation

1.
Place lever assembly into position and secure with

the two lever to dash attaching screws.

2.
Place idler lever in position with lever assembly,

align holes and install clevis pin and clip.

3.
Position equalizer on front cable stud and secure

with check nut.

4.
Install return spring at equalizer.

5. Adjust parking brake as outlined under Maintenance

and Adjustments in this section.

6. Connect positive battery cable.

Idler Lever

Removal

NOTE:
Remove positive cable from battery

to eliminate possibility of creating short cir-

cuits under dash.

1.
Place parking brake lever in released' position.
2.
Eemove return spring at equalizer.

3.
Remove equalizer check nut, and separate cable stud

from equalizer.

4.
Remove clevis pin clip and pin from idler lever

assembly.

5. Remove cable ball from idler lever.

6. Remove pivot pin clip and pivot pin, then remove

idler lever from vehicle.

Installation

1.
Place, idler lever into position and secure with

the pivot pin and clip.

2.
Connect cable ball to idler lever.

3.
Place idler lever in position with lever assembly,

align holes and install clevis pin and clip.

4.
Position equalizer on front cable stud and secure

with check nut.

5. Install return spring at equalizer.

6. Adjust parking brake as outlined under Maintenance

and Adjustments in this section.

7. Connect positive battery cable.

Front Cable

Removal

NOTE:
Remove positive cable from battery

to eliminate possibility of creating short cir-

cuits under dash.

1.
Place parking brake lever in released position.

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES 5-12

VIEW B

Fig.
21—Parking Brake System-Chevy II

2.
Remove return spring at equalizer.

3.
Remove equalizer check nut, and separate cable

stud from equalizer.

4.
Remove clamp from underbody guide bracket. (Con-

vertible models only, also remove clamp from guide

bracket at underbody support.)

5. Remove cable retainer from underbody bracket.

6. Compress expanded conduit locking fingers at toe

pan,
remove cable ball from idler lever, and with-

draw cable from car.

Installation

1.
Position cable ball and conduit tip through cutout

in toe pan.. Make sure conduit locking fingers are

fully expanded and secured in cutout, then position

cable ball in idler lever clevis.

2.
Present parking brake lever to one notch.

3.
P}ace retainer in conduit groove so that conduit

end is secure in underbody bracket.

4.
Position cable in guide bracket(s) and secure cable

in bracket with clamp(s).

5. Place one check nut on cable stud and insert stud

into equalizer, then place second check nut on stud.

6. Connect cable return spring.

7. Adjust parking brake as outlined in this section.
8. Connect positive battery cable.

Rear Cable

Removal

1.
Place parking brake lever in released position.

2.
Disconnect front cable return spring at equalizer.

3.
Remove check nut from front cable stud, withdraw

stud from equalizer, and remove equalizer from

rear cable.

4.
Remove retainers from grooves in rear cable con-

duit, and remove cable from bracket.

5. Remove cable from center body bumper bracket

and spring clip at shock absorber lower mount.

6. Back off rear service brakes sufficiently to allow

for drum removal.

7. Remove both rear wheels and drums.

8. Remove secondary brake shoe return spring.

9. Remove secondary brake shoe hold-down spring

and pin.

10.
Remove cable end from parking brake actuating

lever.

11.
Compress expanded conduit locking fingers at flange

plate entry hole and withdraw cable.

CHEVROLET CHASSIS SERVICE MANUAL

Installation

1.
Pass end of cable and conduit tip through flange

plate entry hole, making sure that conduit locking

fingers all expand fully.

2.
Compress retaining spring and place cable end in

actuating lever.

3.
Install secondary shoe hold-down pin and spring.

4.
Install secondary shoe return spring.

5. Install drum and wheel.

6. Snap cable conduit into spring clip at shock ab-

sorber lower mount.

7. Install cable conduit in bracket at center body bump-

er bracket.

8. Position cable conduit ends in cable bracket and

install retainers in grooves.

9. Place equalizer on cable and insert forward cable

stud. Install check nut and return spring.

NOTE:
To perform its intended function, equal-

izer must be free to slide on rear cable. Lubri-

cate cable at equalizer with chassis grease.

10.
Adjust rear service brakes and parking brake as

outlined in this section.
BRAKES 5-13

PARKING BRAKE-CORVETTE (Fig. 22)

Lever Assembly

Removal

1.
Place parking brake lever in the fully released

position.

2.
Under vehicle, unhook and remove return, spring.

3.
Remove rear nut from cable stud at equalizer and

allow front cable to hang down.

4.
Inside vehicle, remove six screws securing cover

to underbody. It is necessary to push the seat

cushion down as shown in Figure 23 to gain access

to the lower mounting screw on each side. Remove

the retainer. Lift the cover upward and to the

rear to allow seal to slide out of cover slot and

remove cover.

5. Remove trim seal from lever (fig. 24).

6. Remove screw and washer securing parking brake

alarm switch to side of lever assembly.

7. Remove four bolts securing lever assembly to under-

body and lift lever assembly upward. Remove lever

forward mounting bracket.

Fig.
22—Parking Brake System—Corvette

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES 5-14

Fig.
23—Removing or Installing Cover Lower Mounting Screws
Fig.
24—Removing or Installing Trim Seal

8. Remove front cable from lever assembly using long

nose pliers as shown in Figure 25. Remove lever

from vehicle.

Installation

1.^
Install front cable in lever assembly using long

nose pliers as shown in Figure 25. Slide slack

cable through hole and place lever assembly in

position.

2.
Place forward mounting bracket in position and

secure plate and lever assembly to underbody with

four mounting bolts.

3.
Secure parking brake alarm switch to side of lever

assembly with washer and screw (fig. 24).

4.
Install trim seal on lever (fig. 24).

5. Insert the end of the trim seal into the slot in the

cover and slide the cover forward and down into

position.

6. Place the retainer in position. Secure retainer and

cover to underbody with six screws. It is necessary

to push the seat cushion down as shown in Figure 23

to gain access to the lower mounting screw hole on

each side.

7. Under vehicle, insert front cable stud through equal-

izer assembly and secure with nut.

8. Install return spring.

9. Adjust parking brake as outlined under Maintenance

and Adjustments in this section.

Front Cable

Removal

1.
Perform the complete parking brake lever removal

procedure above.

2.
Under vehicle, remove nut, washer, and bolt se-

. curing pulley to pulley bracket (fig. 22).

3.
Remove seal grommet from underbody cable hole.

4.
Pull front cable out of vehicle.

Installation

1.
Install seal grommet around front cable.

2.
Slide front cable into position through cable hole

and work seal grommet into installed position.

3.
Under vehicle, loop front cable around pulley wheel

and secure pulley wheel to bracket with bolt, washer,

and nut (fig..22).

4.
Perform the complete parking brake lever installa-

tion procedure above.
Removal

1.
Remove the cable clip retainers on the back side of

the frame rail from each of the rear brake cable

ends.

2.
Disconnect the cable at the rear wheel flange plate.

3.
Remove the cable ball out of the recess in .the brake

lever assembly clevis.

4.
Disconnect the cables at the equalizer connector and

remove the cables.

Installation

1.
Attach the rear cable balls on the rear cable ends

to the rear wheel recess in the brake lever assembly

clevis.

2.
Attach the cable assembly to the rear wheel flange

plate.

3.
Connect the cable assemblies along the frame rail

area.

4.
Insert the cable end through the equalizer and attach

to the equalizer connector.

5. Adjust as outlined under Maintenance and

Adjustments.

6. Lubricate the cables and all moving parts for

trouble-free operation—see Lubrication, Section 0.

Fig.
25—Removing or Installing Front Cable

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES 5-15

Brake Shoes

Refer to parking brake shoe service procedures under

Disc Brakes in this section.

BRAKE PEDAL (Fig. 26)

Removal

NOTE: Refer to Section 1A for removal

air conditioning components if necessary.
of

1.

5.

b.

c.
Disconnect clutch pedal return spring (manual trans-

mission models only).

Disconnect clutch push rod at pedal.

Disconnect brake pedal return spring (Chevelle and

Camaro only).

Disconnect brake pedal from main cylinder push

rod by removing retainer and clevis pin.

Corvette only:

a. Remove steering column from vehicle as outlined

in Section 9.

Support main cylinder frdm inside engine com-

partment and remove four support brace nuts.

Remove four nuts and bolts securing support

plate to bracket and remove support plate.

d. Remove two screws securing bracket to under-

side of instrument panel and lower bracket and

pedals to floor.

Remove retainer from right side of pedal pivot

shaft.

7.
Slide clutch pedal assembly to the left and remove

from support brace.

8. Withdraw brake pedal and all nylon bushings.

Inspection

1.
Clean all metal parts with a good nontoxic cleaning

solvent.

2.
Wipe nylon bushings clean with a clean cloth.
6
CAUTION: Nylon bushings should not be treated

with cleaning agent of any nature.

3.
Inspect all nylon bushings for wear and damage.

4.
Inspect mating surface of bushings for wear and

damage—replace parts as required.

Installation

1.
Lubricate and install nylon bushings on pedal pivot

shaft, right side of support brace cutout, and through

both ends of brake pedal bore.

2.
Chevrolet, Chevy n, and Corvette: Position brake

pedal return spring on pedal arm and place pedal

assembly in support brace. Index return spring in

support brace cutout.

3.
Chevelle and Camaro: Place pedal assembly in

support brace.

4.
Slide pedal pivot shaft through support brace and

brake pedal bore.

5.
Install retainer to right side of pedal pivot shaft.

6. Corvette only:

a. Install bracket with pedal assemblies to underside

of instrument panel with two screws.

b.
Install support plate on bracket with four bolts

and nuts. • • ' •

c. Place main cylinder in position and install four

bracket and cylinder mounting bolts; secure en-

tire assembly with four nuts.

d. Install steering column in vehicle as outlined

in Section 9.

7.
Chevelle and Camaro: Install brake pedal return

spring.

8. On manual transmission models, connect clutch pedal

push rod to pedal bracket and install retainer. In-

stall clutch pedal return spring.

9. Adjust brake pedal free travel as outlined in this

section. Adjust stoplight switch as outlined in Section

CHEVROLET

CHEVELLE

Fig.
26—Brake Pedal Installation

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES 5-16

6Y. Adjust clutch pedal travel as outlined in

Section 7.

SHOES AND LININGS

Organic Linings

NOTE:
If brake drums are worn severely, it

may be necessary to retract the adjusting screw.

To gain access to the adjusting screw star

wheel, knock out the lanced area in the web of

the brake drum using a chisel or similar tool.

Release the actuator from the star wheel by

lifting with a small screw driver and back off

the star wheel with a second screw driver (press

down on the handle to retract shoes).

CAUTION: After knocking out the metal, be

sure to remove it from the inside of the drum .

and clean all metal from the brake compartment.

A new hole cover must be installed when drum

is reinstalled.

Removal

1.
Raise the vehicle and plate on jack stands.

2.
Loosen check nuts at parking brake equalizer suffi-

ciently to remove, all tension from brake cable.

3.
Remove brake drums.

NOTE:
Since there are wheel cylinder piston

stops to prevent pistons from leaving cylinders,

it is not necessary to install wheel cylinder

clamps when brake shoes are removed; however,

brake pedal must not be depressed while drums

are removed.

4.
Unhook brake shoe pull back springs from anchor

pin and link end, using Tool J-8049 (fig. 27).

5. Remove the actuator return spring and link.

6. Remove hold-down pins and springs (fig. 28).

7. Remove the actuator assembly.
NOTE:
The actuator, pivot and override spring

are an assembly. It is not recommended that

they be disassembled for service purposes,

unless they are broken. It is much easier to

assemble and disassemble the brakes by leaving

them intact.

8. Separate the brake shoes by removing adjusting

screw and spring.

9. Remove parking brake lever from secondary brake

shoe (rear only).

Inspection

1.
Clean all dirt out of brake drum using care to avoid

getting dirt into front wheel bearings. Inspect drums

for roughness, scoring or out-of-round. Replace or

recondition drums as required.

2.
Inspect wheel bearings and oil seal, and replace

any necessary parts.

3.
On Chevrolet only:

Carefully pull lower edges of wheel cylinder boots

away from cylinders and note whether interior is

wet with brake fluid. Excessive fluid at this point

indicates leakage past piston cups and a need for

wheel cylinder overhaul or replacement.

NOTE:
A slight amount of fluid is nearly always

present and acts as lubricant for the piston.

4.
Check cylinders with internal boots by carefully pull-

ing a small part of the boot out of the cylinder.

Note whether interior is wet with brake fluid. Ex-

cessive fluid at this point indicates leakage past

piston cups and a need for wheel cylinder overhaul

or replacement.

5. Check all brake flange plate attaching bolts to make

sure that they are tight. Clean all rust and dirt

from shoe contact faces on flange plate (fig. 29),

using fine emery cloth.

Installation

CAUTION: Make certain to install recom-

Fig.
27-Unhooking Pull Back Spring
Fig.
28—Removing Hold-Down Springs and Pins

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