1967 CHEVROLET CAMARO wheel

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 5-16

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

BRAKES 5-19

correct service parts when servicing a Bendix main

cylinder.

1.
The two-letter identification stamp on the end of

the master cylinder indicates the displacement capa-

bilities of that particular cylinder. Master cylinders

should only be replaced with another cylinder bearing

the same two-letter identification.

2.
The length of the component pistons in the master

cylinders are critical factors in displacement capa-

bilities of a particular master cylinder. These

pistons are coded, using rings or grooves in the

shank of the piston. It is mandatory that when
pistons are replaced, the replacing piston must con-

tain the same identification marks and the same

contour at the push rod end as the piston which

is removed.

Delco Moraine dual master cylinders, used with

drum-type brakes, contain a rubber check valve and

check valve spring in each outlet boss. When the

car is equipped with disc brakes on the front and

drum brakes on the rear, the dual master cylinder

will have a check valve and spring in the outlet

boss for the rear brakes. No check valve is required

for four wheel disc brakes, and, therefore, the outlet

1.
Spring

2.
Check Valve

3. Valve Seat

4.
Bleeder Valve

5. Bail Wire

6. Cover

7. Diaphragm

8. Stop Screw

9. Body
Fig.
32-Main Cylinder for Drum Type Brakes-Exploded View

10.
Spring

11.
Retainer

12.
Seal

13.
Seal Protector

14.
Primary Piston

15.
Seal

16.
Seal

17.
Piston Extension Screw
18.
Secondary Piston Stop

19.
Spring

20.
Spring Retainer

21.
Seal

22.
Seal Protector

23.
Secondary Piston

24.
Seal

25.
Retaining Ring

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES 5-21

brake fluid. Coat the primary and secondary seals

on the secondary piston with clean brake fluid. Insert

the secondary piston spring retainer into the sec-

ondary piston spring. Place the retainer and spring

down over the end of the secondary piston until the

retainer locates inside of the lips of the primary

cup.

10.
Hold the master cylinder with the open end of the

bore down. Push the secondary piston into the bore

until the spring seats against the closed end of the

bore.

11.
Position the master cylinder in a vise with the

open end of the bore up. Coat the primary and

secondary seal on the primary piston with clean

brake fluid. Push the primary piston assembly,

spring end first, into the bore of the master cylinder*

Hold the piston down and snap the lock ring into

position in the small groove in the I.D. of the bore.

12.
Push the primary piston down to move the secondary

piston forward far enough to clear the stop screw

hole in the bottom of the front fluid reservoir. Install

the stop screw.

13.
Install reservoir diaphragm in the reservoir cover

and install the cover on the main cylinder. Push

bail wire into position to secure the reservoir cover.

Installation

1.
Assemble the push rod through the push rod retainer,

if it has been disassembled.

2.
Push the retainer over the end of the main cylinder.

Assemble new boot over push rod and press it down

over the push rod retainer. Slide new mounting

gasket into position.

3.
Secure .the main cylinder to the firewall with mount-

ing bolts.

4.
Connect the push rod clevis to the brake pedal with

pin and retainer.

5. Connect the brake lines to the main cylinder.

6. Fill the main cylinder reservoirs to the levels

shown in Figure 8. Bleed the brake system as out-

lined in this section.

7. K necessary, adjust the brake pedal free play as

outlined in this section.

WHEEL CYLINDER (Fig. 33)

The wheel cylinder boots should be removed from a

cylinder body only when they are visibly damaged or

leaking fluid. Wheel cylinders having torn, cut, or heat-

cracked boots should be completely overhauled.

Removal

1.
Raise vehicle and place on jack stands.

Fig.
33-Chevelle Wheel Cylinder—Exploded View

1.
Push Rod Boot 6. Spring

2.
Piston 7. Piston Cup

3. Piston Cup 8. Piston

4.
Housing 9. Push Rod Boot

5. Fluid Inlet
2.
Remove wheel and tire assembly. Back off brake

adjustment, if necessary, and remove drum.

3.
Disconnect brake system hydraulic line from

cylinder.

4.
Remove brake shoe pull back springs.

5. Remove screws securing wheel cylinder to flange

plate. Disengage cylinder push rods from brake

shoes and remove cylinder.

NOTE:
On Chevrolet, it is necessary to re-

move the anchor pin which holds the front wheel

cylinder to flange plate to remove the front

wheel cylinder.

Disassembly

1.
Remove boots from cylinder ends with pliers and

discard boots.

2.
Remove and discard pistons and cups.

Inspection and Cleaning

NOTE:
Staining is not to be confused with

corrosion. Corrosion can be identified as pits

or excessive bore roughness.

1.
Inspect cylinder bore. Check for staining and corro-

sion.
Discard cylinder if corroded.

2.
Polish any discolored or stained area with crocus

cloth by revolving the cylinder on the cloth sup-

ported by a finger. Do not slide tfce cloth in a

lengthwise manner under pressure.

NOTE:
Before washing parts, hands must be

clean. Do not wash hands in gasoline or oil

before cleaning parts. Use soap and water to

clean hands.

3.
Wash the cylinder and metal parts in Declene or

equivalent.

4.
Shake excess cleaning fluid from the cylinder-. Do

not use a rag to dry the cylinder as lint from the rag

cannot be kept from the cylinder bore surfaces.

5. Check piston for scratches or other visual damage;

replace if necessary.

Assembly (Fig. 33)

1.
Lubricate the cylinder bore and counterbore with

clean brake fluid and insert spring - expander

assembly.

2.
Install new cups with flat surfaces toward outer

ends of cylinder. Be sure cups are lint and dirt free

before insertion. Do not lubricate cups prior to

assembly.

3.
Install new Durex pistons into cylinder with flat

surfaces toward center of cylinder. Do not lubri-

cate pistons before installation.

4.
Press new boots into cylinder counterbores by hand.

Do not lubricate boots prior to installation.

Installation

1.
Position wheel cylinder to brake flange plate. Install

screws and tighten securely.

NOTE:
On Chevrolet front wheels, mount front

wheel cylinders to the brake flange plate by

installing the threaded anchor pin through the

wheel cylinder housing and tighten to 130 lb. ft.

To secure, peen over the flat washer on the

anchor pin.

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES 5-22

2.
Replace ail push rods and pull back springs.

3.
Connect hose or line to wheel cylinder.

NOTE:
If replacing front wheel cylinder, con-

nect hose and inspect installation as outlined in

"Hydraulic Brake Hose Replacement".

4.
Install drum and wheel.

5. Bleed brakes as outlined in this section.

ANCHOR PIN

Front Wheel

1.
Raise front of vehicle and place on jack stands.

2.
Remove wheel and drum as outlined in this section.

3.
Remove brake shoe pull back springs, link and guide

plate.

4.
Disengage anchor pin lock and remove anchor pin by

turning counterclockwise.

5. Place new lock plate on anchor pin and pass pin

through the hole in flange plate and screw into tapped

hole in spindle support.

6. Torque pin to 130 lb. ft. and lock by peening over

washer tabs.

7. Install brake shoe guide plate, link and pull back

springs.

8. Adjust brakes, install drum and wheel as outlined

in this section. Test brake operation.

Rear Wheel

Two type anchor pins are used in production for the

rear wheels. The riveted type is not serviced and if

failure or damage should occur to either the anchor

pin or flange plate, both parts will have to be replaced

and the threaded type anchor pin used.

Threaded Type

1.
Raise rear of vehicle and place on jack stands,

2.
Remove wheel and drum as outlined in this section.

3.
Remove brake shoe pull back springs, link and guide

plate.

4.
Remove anchor pin retaining nut and washer and

remove pin from flange plate.

5. Position anchor pin to flange plate, install lock

washer and nut, and torque pin to 80 lb. ft.

6. Install brake shoe guide plate, link and pull back

springs.

7. Adjust brakes and install drum and wheel as outlined

in this section.

8. Test brake operation.

BRAKE DRUMS

Front brake drums are the demountable type; that is,

they can be removed without removing the hub. Rear

brake drums are demountable and may be removed

wihtout removing the axle shaft.

A lanced "knock out" area (fig. 34) is provided in

the web of the brake drum for servicing purposes in

the event retracting of the brake shoes is required in

order to remove the drum.

A small screw driver or hooked wire may be inserted

to disengage the automatic adjuster actuating lever so

the star wheel may be turned.

Removal

1.
Raise vehicle and place on jack stand.
2.
Remove wheel and tire assembly, back off brake

adjustment and remove drum.

Inspection and Reconditioning

Whenever brake drums are removed they should be

thoroughly cleaned and inspected for cracks, scores,

deep grooves, and out-of-round. Any of these conditions

must be corrected since they can impair the efficiency

of brake operation and also can cause premature failure

of other parts.

Smooth up any slight scores by polishing with fine

emery cloth. Heavy or extensive scoring will cause

excessive brake lining wear and it will probably be

necessary to rebore in order to true up the braking

surface.

An out-of-round drum makes accurate brake shoe

adjustment impossible and is likely to cause excessive

wear of other parts of brake mechanism due to its

eccentric action.

A drum that is more than .008" out-of-round on the

diameter is unfit for service and should be rebored.

Out-of^round, as well as taper and wear can be ac-

curately measured with an inside micrometer fitted

with proper extension rods.

If drum is to be rebored for use with standard size

brake facings which are worn very little, only enough

metal should be removed to obtain a true smooth braking

surface.

If drum has to be rebored more than .020" over the

standard diameter, it should be rebored to .060" diameter

oversize and the brake facing should be replaced with

.030"
oversize facings.

A brake drum must not be rebored more than .060"

over the maximum standard diameter, since removal

of more metal will effect, dissipation of heat and may

cause distortion of drum. Chevrolet brake facing is

not furnished larger than .030" oversize and this will

not work efficiently in drums bored more than .060"

oversize.

Brake drums may be refinished either by turning or

grinding. Best brake performance is obtained by turning

drums with a very fine feed. To insure maximum lining

life,
the refinished braking surface must be smooth and

free from chatter or tool marks, and run-out must not

exceed .005" total indicator reading.

Cleaning

New brake drums in parts stock are given a light.

coating of rust proofing oil to prevent the formation of

rust on the critical braking surfaces during the time

that the drums are in storage.

This rust proofing oil must be carefully removed

before the drum is placed in service to prevent any

of this oil from getting on the brake shoe facings, which

might cause an extreme brake grab condition.

It is recommended that a suitable volatile, non-toxic,

greaseless type solvent be used to clean the oil from the

braking surface of the new brake drums before they are

•placed in service to insure the cleanest possible surface.

Gasoline or kerosene should not be used as there is

danger that a portion of the diluated oil substance may

be left on the braking surface that may later cause

difficulty.

Installation

1.
Make brake adjustment as outlined in this section.

CHEVROLET CHASSIS SERVICE MANUAL