air filter CHEVROLET CAMARO 1967 1.G Chassis Workshop Manual

LUBRICATION 0-13

LUBRICATION

INDEX

Page

Engine Crankcase Oil . 0-13

Crankcase Capacities. . 0-13

Lubrication . ,
•
o-13

SAE Viscosity Oils 0-13

Types of Oils 0-14

Maintaining Oil Level 0-14

Oil and Filter Change Intervals 0-14

Oil.
. . ...:.. 0-14

Filter o-14

Crankcase Dilution . 0-14

Automatic Control Devices to Minimize

Crankcase Dilution 0-14

Crankcase Breather Cap 0-14

Crankcase Ventilation System 0-15

Valve Type 0-15

Fuel Filter 0-15

Air Cleaner . 0-15

Polyurethane Type 0-15

Oil Wetted Paper Element Type 0-15

Battery Terminal Washers 0-15
Page

Distributor 0-15

Rear Axle and 3-Speed and Overdrive

4-Speed Transmission 0-15

Recommended Lubricants 0-15

Multi-Purpose Gear Lubricants 0-15

Lubricant Additions 0-15

Lubricant Changes 0-15

Powerglide Transmission 0-15

Turbo Hydra-Matic 0-16

Front Wheel Bearings 0-16

Manual Steering Gear . . . . 0-16

Power Steering 0-16

Air Conditioning 0-16

Brake Master Cylinder. 0-16

Parking Brake 0-16

Clutch Cross-Shaft , 0-16

Chassis Lubrication 0-16

Lubrication Diagrams . . 0-19

Body Lubrication (Chevrolet, Chevelle, Chevy n, Camaro). 0-20

Body Lubrication Points (Corvette) . 0-21

The selection of the proper lubricant and its correct

application at regular intervals does much to increase the

life and operation of all moving parts of the vehicle.

Consequently, it is important that the correct grade of

oil or grease, as noted in the following pages, be used.

ENGINE CRANKCASE OIL

Crankcase Capacity

4 Cylinder 4 qt.

6 Cylinder 4 qt.

8 Cylinder (283) 4 qt.

8 Cylinder (327) 4 qt.

8 Cylinder (350) 4 qt.

8 Cylinder (396) 4 qt.

8 Cylinder (427) Chevrolet 4 qt.

8 Cylinder (427) Corvette 5 qt.

For 4 Cyl. Add .5 qt. with filter change;

1 qt. for 6 and 8 Cyl. engines.

Lubrication

Crankcase oil should be selected to give the best per-

formance under the climatic and driving conditions in the

territory in which the vehicle is driven.

During warm or hot weather, an oil which will provide

adequate lubrication under high operating temperatures

is required.

During the colder months of the year* an oil which will

permit easy starting at the lowest atmospheric tempera-

ture likely to be encountered, should be used.

When the crankcase is drained and refilled, the crank-

case oil should be selected, not on the basis of the exist-

ing temperature at the time of the change, but on the

lowest temperature anticipated for the period during

which the oil is to be used.

Unless the crankcase oil is selected on the basis of

viscosity or fluidity of the anticipated temperature, dif-

ficulty in starting will be experienced at each sudden

drop in temperature.
SAE Viscosity Oils

SAE Viscosity Numbers indicate only the viscosity or

body of the oil, that is, whether an oil is a light or a

heavy body oil, and do not consider or include other

properties or quality factors.

The lower SAE Viscosity Numbers, such as SAE 5W

and SAE 10W which represent the light body oils, are

recommended for use during cold weather to provide

easy starting and instant lubrication. The higher SAE

Viscosity Numbers such as SAE 20 and SAE 20W, which

represents heavier body oils, are recommended for use

during warm or hot weather to provide improved oil

economy and adequate lubrication under high operating

temperatures.

Oils are available which are designed to combine the

easy starting characteristics of the lower SAE Viscosity

Number with the warm weather operating characteristics

of the higher SAE Viscosity Number. These are termed

"multi-viscosity oils," SAE 5-10W, SAE 5W-20, SAE

10W-20W, and SAE 10W-30.

The following chart will serve as a guide for the

selection of the correct SAE Viscosity Number for use

under different atmospheric temperature ranges, and

suggests the appropriate SAE Viscosity Numbers when

multi-viscosity oils are used.

Lowest Anticipated

Temperature

During Time

Oil Will Be

in Crankcase

32°F.

0°F.

Below 0°F.
Recommended

SAE Viscosity

Oils

SAE 20 or 20W

SAE 10W

SAE 5W
Recommended

SAE

Multi-

Viscosity

Oils

SAE 10W-30 .

SAE 10W-30

SAE 5W-20

SAE 30 or 10W-30 is recommended when most of the

driving is at high speeds and/or at temperatures above

90
°F.

CHEVROLET CHASSIS SERVICE MANUAL

LUBRICATION 0-15

CRANKCASE VENTILATION VALVE

VALVE TYPE

NOTE: Under prolonged dusty driving condi-

tions,
it is recommended that these operations

be performed more often. Every 12,000 miles

or 12 months the valve should be replaced.

Connecting hoses, fittings, flame arrestor and

crankcase breather cap (where used) should be

cleaned. At every oil change the system should

be tested for proper function and serviced, if

necessary.

FUEL FILTER

Replace filter element located in carburetor inlet if

flooding occurs, if engine surges during constant speed

operation (pulsating effect) or if poor performance is

experienced during acceleration or at higher speeds.

AIR CLEANER

NOTE: Under prolonged dusty driving condi-

tions,
it is recommended that these operations

be performed more often.

POLYURETHANE TYPE-

Every 12,000 miles clean element in solvent, squeeze

out solvent, then soak in engine oil and squeeze out

excess.

OIL WETTED PAPER ELEMENT TYPE-

First 12,000 miles inspect or test element; if satis-

factory, re-use element but recheck every 6,000 miles

until replaced. Element must not be washed, oiled,

tapped or cleaned with an air hose.

BATTERY TERMINAL WASHERS

Battery terminals have felt washers between top of

case and cable connections to minimize corrosive action

of battery acid. These felt washers should be saturated

with engine oil every 6,000 miles.

DISTRIBUTOR

4 and 6-Cylinder Engine—Remove distributor cap and

rotate lubricator 1/2 turn at 12,000 mile intervals. Re-

place at 24,000 mile intervals.

8-Cylinder Engine—Change cam lubricator end for end

at 12,000 mile intervals. Replace at 24,000 mile

intervals.

REAR AXLE AND 3-SPEED AND

OVERDRIVE, 4-SPEED TRANSMISSIONS

The passenger car operates under the most severe

lubrication conditions at high speed and requires a hypoid

lubricant which will meet this condition.

Recommended Lubricants

Standard Rear Axles—SAE 90 "Multi-Purpose" gear

lubricant.

Positraction Rear Axles—Use special Positraction

lubricant.
CAUTION: Straight Mineral Oil gear lubricants

must not be used in hypoid rear axles.

Transmissions—SAE 90 "Multi-Purpose" gear

lubricant.

The SAE 90 viscosity grade is recommended for year

round use. However, when extremely low temperatures

are encountered for protracted periods during the winter

months, the SAE 80 viscosity grade may be used.

"Multi-Purpose" Gear Lubricants

Gear lubricants that will satisfactorily lubricate hypoid

rear axles have been developed and are commonly re-

ferred to as ' 'Multi-Purpose" gear lubricants meeting

U.S.
Army Ord. Spec. MIL-L-2105B.

These lubricants can also be satisfactorily used in

manual transmissions.

CAUTION: With Positraction rear axles use

special Positraction lubricant.

"Multi-Purpose" gear lubricants must be manufac-

tured under carefully controlled conditions and the

lubricant manufacturer must be responsible for the

satisfactory performance of his product. His reputation

is the best indication of quality.

Lubricant Additions

The lubricant level in the axle and transmission hous-

ings should be checked periodically. (Every 6,000 miles.)

It is recommended that any additions required to bring

up the lubricant level be made using the same type lubri-

cant already in the housing.

When checking lubricant level in transmission or rear

axle the unit being cheeked should be at operating

temperature. With unit at operating temperature the

lubricant should be level with bottom of the filler plug

hole.
If the lubricant level is checked with the unit cold

the lubricant level should be 1/2 inch below the filler

plug hole.

Lubricant Changes

The rear axle lubricant does not require changing for

the life of the vehicle. If additions are needed, or when

refilling the axle after service procedures, use lubricants

described above.

POWERGLIDE TRANSMISSION

NOTE: Every 12,000 miles, it is recommended

that the Powerglide low band be adjusted as

specified in Section 7 of this manual.

Every 6,000 miles--Check fluid level on dipstick with

engine idling, selector lever in neutral position, parking

brake set and transmission at operating temperature. If

fluid level is below full mark on dip stick, adding a small

amount of Automatic Transmission Fluid, General Motors

Automatic Transmission Fluid (Part Numbers 1050568-

69,
70) is recommended. If this fluid is not obtainable,

use Automatic Transmission Fluid Type 'A' bearing the

mark AQ-ATF followed by a number and the suffix letter

'A'.
Recheck fluid level on dip stick and again add a

small amount of fluid if needed to bring level to full

mark. DO NOT OVERFILL.

CHEVROLET CHASSIS SERVICE MANUAL

LUBRICATION 0-16

Every 12,000 miles (more frequently*, depending on

severity of service, if vehicle is used to pull trailers,

carry full loads during high ambient temperatures,

operate in mountainous terrain or operate under other

severe conditions--Remove fluid from the transmission

sump and add one and a half quarts of fresh fluid for

Camaro and Chevy II and two quarts for Chevrolet,

Chevelle, and Corvette. Operate transmission through all

ranges and check fluid level as described above.

•Except if vehicle is equipped with transmission pro-

vided in heavy duty service options. If so equipped,

drain converter and pump every 12,000 miles and add

approximately seven and a half quarts of fresh fluid

for Chevy II and nine quarts for Chevrolet and Chevelle.

TURBO HYDRA-MATIC

Lubrication. recommendations for the Turbo Hydra-

Matic are the same as outlined for the Powerglide

transmission except for fluid capacity and filter change

listed below.

After checking transmission fluid level it is important

that the dip stick be pushed all the way into the fill tube.

Every 12,000 miles — after removing fluid from the

transmission sump, approximately 7 1/2 pints of fresh

fluid will be required to return level to proper mark on

the dip stick.

Every 24,000 miles, or at every other fluid change--

the transmission sump strainer should be replaced.

FRONT WHEEL BEARINGS

It is necessary to remove the wheel and hub assembly

to lubricate the bearings. The bearing assemblies should

be cleaned before repacking with lubricant. Do not pack

the hub between the inner and outer bearing assemblies

or the hub caps, as this excessive lubrication results in

the lubricant working out into the brake drums and

linings.

Front wheels of all passenger car models are equipped

with tapered roller bearings and should be packed with a

high melting point water resistant front wheel bearing

lubricant whenever wheel and hub are removed.

CAUTION: "Long fibre" or "viscous" type

lubricant should not be used. Do not mix wheel

bearing lubricants. Be sure to thoroughly clean

bearings and hubs of all old lubricant before

repacking.

The proper adjustment of front wheel bearings is one

of the important service operations- that has a definite

bearing on safety. A car with improperly adjusted front

wheel bearings lacks steering stability, has a tendency to

wander or shimmy and may have increased tire wear.
The adjustment of these bearings is very critical. The

procedure is covered in Section 3 of this manual under

Front Wheel Bearings—Adjust,

MANUAL STEERING GEAR

Check lubricant level every 36,000 miles. If required,

add EP Chassis Lubricant.

POWER STEERING

On models equipped with power steering gear, check

fluid at operating temperature in pump reservoir. Add

GM Power Steering Fluid, or, if this is not available, use

Automatic Transmission Fluid "Type A" bearing the

mark AQ-ATF followed by a number and the suffix letter

'A'
to bring level to full mark on dip stick.

AIR CONDITIONING

After the first 6,000 miles, check all hose clamp

connections for proper tightness.

Every 6,000 miles check sight glass under the hood,

after the system has been in operation for several

minutes. Sight glass should be clear but may, during

milder weather, show traces of bubbles. Foam or dirt

indicate a leak which should be repaired immediately.

BRAKE MASTER CYLINDER

Check level every 6,000 miles and maintain 1/4" below

lowest edge of each filler opening with GM Hydraulic

Brake Fluid Supreme No. 11.

PARKING BRAKE

Every 6,000 miles, apply water resistant lube to park-

ing brake cable, cable guides and at all operating links

and levers.

CLUTCH CROSS-SHAFT

Periodic lubrication of the clutch cross shaft is not

required. At 36,000 miles or sooner, if necessary;

remove plug, install lube fitting and apply CHASSIS

LUBRICANT.

CHASSIS LUBRICATION

For chassis lubrication, consult the lubrication chart.

It shows the points to be lubricated and how often the

lubricant should be applied.

The term "chassis lubricant" as used in this manual,

describes a water resistant EP chassis grease designed

for application by commercial pressure gun equipment.

CHEVROLET CHASSIS SERVICE MANUAL

LUBRICATION 0-17

LUBRICATE EVERY 6,000 MILES

LUBRICATE EVERY 12,000 MILES

LUBRICATE EVERY 36,000 MILES

Refill Positraction Rear Axle with

Special Lubricant Only.
GL—Multi-purpose
or
Universal Gear Lubricant4

WB-Wheel Bearing Lubricant

(Whenever Brakes are serviced)

CL—Chassis Lubricant

EO-EngineOil
AT-Automatic Transmission Fluid {Type
A)

BF-Brake Fluid

Fig.
32—Lubrication Diagram—Chevrolet

1.
Front Suspension

2.
Steering Linkage

3. Steering Gear
4.
Air Cleaner

5. Crankcase Breather Cap

6. Front Wheel Bearings
7. Transmission

8. Rear Axle

9. Oil Filter
10.
Battery

11.
Parking Brake

12.
Brake Master Cylinder

CHEVROLET CHASSIS SERVICE MANUAL

LUBRICATION 0-18

12

LUBRICATE EVERY 6000 MILES GL -Multi-purpose Gear Lubricant*

WB—Wheel Bearing Lubricant

LUBRICATE EVERY 12000 MILES (Whenever Brakes are serviced)

CL —Chassis Lubricant

LUBRICATE EVERY 36000 MILES E°-En9ine°il

"Refill Positraction Rear Axle with Special Positraction Rear Axle

Lubricant Only.
AT —Automatic Transmission Fluid (Type A)

SL —Steering Gear Lubricant

BF -Hydraulic Brake Fluid

1.
Front Suspension

2.
Steering Linkage

3. Steering Gear
Fig.
33—Lubrication Diagram—Chevelle

4.
Air Cleaner

5. Crankcase Breather Cap

6. Front Wheel Bearings
7. Transmission

8. Rear Axle

9. Oil Filter
10.
Battery

11.
Parking Brake

12.
Brake Master CylincU

CHEVROLET CHASSIS SERVICE MANUAL

LUBRICATION
0-19

.
3-SPEED
4-SPEED

7 OVER DRIVE

10 9 5 1 6 2 '
AUTOMATIC

3 12 11

LUBRICATE EVERY 6,000 MILES GL-Gear Lubricant*

WB-Wheel Bearing Lubricant

(Wh Bk
AT-Automdtic Transmission Fluid

^ WB-Wheel Bearing Lubricant (Type A)

-TV
LUBRICATE
EVERY 12,000 MILES (Whenever Brakes are serviced)

' CL—Chassis Lubricant

• LUBRICATE EVERY 36,000 MILES EO_Engine Oil
BF
-Brake Fluid

•Refill Positt

Special Lubricant Only.
Axl«
with

1.
Front Suspension

2.
Steering Linkage

3. Steering Gear
Fig.
34—Lubrication Diagram—Chevy I!

4. Air Cleaner

5. Crankcase Breather. Cap

6. Front Wheel Bearings
7. Transmission

8. Rear Axle

9.
Oil Filter
10.
Battery

11.
Parking Brake

12.
Brake Master Cylinder

CHEVROLET CHASSIS SERVICE MANUAL

LUBRICATION 0-20

3-SPEED

4—SPEED

AUTOMATIC

LUBRICATE EVERY 6000 MILES

LUBRICATE EVERY 12000 MILES

LUBRICATE EVERY 36000 MILES

*
Refill
positraction rear axle with

special lubricant only.
GL -GEAR LUBRICANT*

WB-WHEEL BEARING LUBRICANT

(WHENEVER BRAKES
ARE
SERVICED)

CL -CHASSIS LUBRICANT

CO-ENGINE
Oil;
AT -AUTOMATIC TRANSMISSION

FLUID (TYPE
A)

BF -BRAKE FLUID

Fig.
35—Lubricafion Diagram—Camaro

1.
Front Suspension

2.
Steering Linkage

3. Steering Gear
4.
Air Cleaner

5. Crankcase Breathe Cap

6. Front Wheel Bearings
7. Transmission

8. Rear Axle

9. Oil Filter
10.
Battery,

11.
Parking Brake

12.
Brake Master Cylinder

BODY LUBRICATION

See Body Service Manual
for
Body Lubrication,

cept Corvette)
(Ex-

CHEVROLET CHASSIS SERVICE MANUAL

LUBRICATION
0-21

6

3-SPEED

4-SPEED

AUTOMATIC

10

LUBRICATE EVERY 6,000 MILES GL -Multi-purpose
or
Universal Gear Lubrincant*

-(V LUBRICATE EVERY 12,000 MILES WB-Wheel Bearing Lubricant

V/^ (Whenever Brakes
are
serviced)
AT —Automatic Transmission Fluid (Type)

BF -Brake Fluid

a
LUBRICATE EVERY 36,000 MILES

* Refill Positraction Rear Axle with

Special Lubricant Only.
CL -Chassis Lubricant

EO—Engine
Oil

Fig.
36—Lubrication Diagram—Corvette

1.
Front Suspension

2.
Steering Linkage

3. Steering Gear
4.
Air
Cleaner

5. Front Wheel

Bearings
6. Transmission

7. Rear Axle

8.
Oil
Filter
9. Battery

10.
Parking Brake

11.
Brake Master Cylinder

BODY LUBRICATION POINTS (CORVETTE)

Lubricate the following items when possible.

Hood Latch Mechanism and Hinges --Apply light engine oil

to pivot points. Don't oil lock pins or catch plates.

i

Rear Compartment Lid Release and Hinges --Apply light

engine
oil.

Side Door Hinge Pins—Apply light engine oil.
Door Lock Rotor and Striker Plate—Apply light engine oil or

stainless stick lubricant.

Lock Cylinders—Lubricate with powdered graphite.

Window Regulators and Controls and Door Lock Remote

Link —Apply light engine
oil.

Gas Tank Filler Cap Hinge—Apply light engine oil.

Weatherstrips and Rubber Bumpers —Coat lightly with
a

rubber lubricant.

CHEVROLET CHASSIS SERVICE MANUAL

HEATER AND AIR CONDITIONING 1A-30

Leak Detector

Tool J-6084 (fig. 43) is a propane gas-burning torch

which is used to locate a leak in any part of the system.

Refrigerant gas drawn into the sampling tube attached to

the torch will cause the torch flame to change color in

proportion to the size of the leak. Propane gas fuel

cylinders used with the torch are readily available

commercially throughout the country.

CAUTION: Do not use lighted detector in any

place where combustible or explosive gases,

dusts or vapors may be present;

Operating Detector

1.
Open control valve only until a low hiss of gas is

heard, then light gas at opening in chimney.

2.
Adjust flame until desired volume is obtained. This

is most satisfactory when blue flame is approxi-

mately 3/8" above reactor plate. The reaction plate

will quickly heat to a cherry red.

3.
Explore for leaks by moving the end of the sampling

hose around possible leak points in the system. Do

not pinch or kink hose.

NOTE: Since R-12 is heavier than air, it is

good practice to place open end of sampling tube

immediately below point being tested, partic-

ularly in cases of small leaks.

CAUTION: Do not breathe the fumes that are

produced by the burning of R-12 gas in the de-

tector flame, since such fumes can be toxic in

large concentrations of R?»12.

4.
Watch for color changes. The color of the flame

which passes through the reaction plate will change

to yellow when sampling hose draws in very small

CHIMNEY

REACTION PLATE

BURNER HEAD

Fig.
43—Leak Detector
leaks of R-12. Large leaks will be indicated by a

change in color to a vivid purplish-blue. When the

sampling hose passes the leak, the flame will clear

to an almost colorless pale-blue again. If the flame

remains yellow when unit is removed from leak,

insufficient air is being drawn in or the reaction

plate is dirty.

NOTE: A refrigerant leak in the high pressure

side of the system may be more easily detected

when, if possible, the system is in operation. A

leak on the low pressure side may be most

easily detected after the engine has been shut

off for several minutes to allow system pres-

sures to equalize. This particularly applies to

the front seal.

VACUUM PUMP

A vacuum pump should be used for evacuating air and

moisture from the air conditioning system.

Vacuum pump, Tool J-5428, (fig.. 44) is available for

this purpose. It is used as a component part of the

Charging Station J-8393, described previously. The fol-

lowing precautions should be observed relative to tbe

operation and maintenance of this pump.

' • Make sure dust cap on discharge outlet of vacuum

pump is removed before operating.

• Keep all openings capped when not in use to avoid

moisture being drawn into the system.

• Oil should be changed after every 250 hours of nor-

mal operation.

To change oil, simply unscrew hex nut located on

back side of pump, tilt backward and drain out oil

(fig. 44). Recharge with 8 ounces of vacuum pump

oil.
If you desire to flush out the pump, use this

same type clean oil. Do not use solvent.

NOTE: Improper lubrication will shorten the

life of pump.

• If this pump is subjected to extreme or prolonged

cold, allow it to remain indoors until oil has reached

approximate room temperature. Failure to warm oil

will result in a blown fuse.

• A five ampere time delay cartridge fuse has been

installed in the common line to protect the windings

of the compressor. The fuse will blow if an ex-

cessive load is placed on the pump. In the event the

fuse is blown, replace with a five ampere time delay

fuse - do not use a substitute fuse as it will result in

damage to the starting windings.

• If the pump is being utilized to evacuate a burnt-out

system, a filter must be connected to the intake

fitting to prevent any sludge from contaminating the

working parts, which will result in malfunction of the

pump.

• Do not use the vacuum pump as an air compressor.

AVAILABILITY OF REFRIGERANT-12

Refrigerant-12 is available through Parts Stock in 25

lb.
drums and in 15 oz. disposable cans. Valves are

available for
the"
disposable cans, which may be used as

individual cans or as a group of up to four cans (fig. 45).

Tool J-6272 is used with one through four cans. The

use of the four-can fixture makes it possible to charge

the system with a known quantity of refrigerant without

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES
5-31

POWER BRAKES

INDEX

General Description 5-31

Maintenance
and"
Adjustments 5-31

Inspection . ... 5_31

Lubrication 5-31

Bleeding Instructions . . . 5.31

Air Cleaner Service . . . , 5.31
Page

Component Replacement 5-31

Power Brake Cylinder ......* 5-31

Removal . . 5-31

Disassembly and Assembly See Overhaul Manual

Installation . . . . 5-31

GENERAL DESCRIPTION

The Power Brake Unit is a self-contained hydraulic

and vacuum unit, utilizing manifold vacuum and atmos-

phere pressure for its power.

This unit permits the use of a low brake pedal as well

as less pedal effort than is required with the conventional

(nonpower) hydraulic brake system. Only two external
line connections are necessary -
one
a vacuum connection

from manifold to check valve located on front shell; the

other, a hydraulic connection from the main cylinder

outlet directly into the hydraulic system. The unit is

mounted on the engine side of the fire wall and directly

connected to the brake pedal.

MAINTENANCE AND ADJUSTMENTS

INSPECTIONS

1.
Check vacuum line and vacuum line connections as

well as vacuum check valve in front shell of power

unit for possible vacuum loss.

2.
Inspect all hydraulic lines and connections at the

wheel cylinders and main cylinder for possible

hydraulic leaks.

3.
Check brake assemblies for scored drums, grease

or brake fluid on linings, worn or glazed linings,

and make necessary adjustments.

4.
Check brake fluid level in the hydraulic reser-

voirs.
The reservoirs should be filled to the levels

shown in Figure 8.

5. Check for loose mounting bolts at main cylinder and

at power section.

6. Check air cleaner filter in power piston extension

and replace filter if necessary.

7. Check brake pedal for binding and misalignment

between pedal
-and
push rod.

LUBRICATION

The power brake unit is lubricated at assembly and
needs no further lubrication other than maintaining

normal reservoir fluid level. The reservoir should be

filled as described in this section.

BLEEDING INSTRUCTIONS

The power system may be bled manually or with a

pressure bleeder as outlined in this section. Use only

GM
Supreme 11 Brake Fluid or equivalent. Do not use the

power assist while bleeding. The engine should not be

running and the vacuum reserve should be reduced to

zero by applying the brake several times before starting

the bleeding procedure.

AIR CLEANER SERVICE

Servicing of the air cleaner is recommended and the

element replaced when restriction becomes severe

enough to affect power brake response. At any other

time, if cleaning of the filter is felt necessary, it should

be shaken free of dirt or washed in soap and water and

thoroughly dried.

COMPONENT REPLACEMENT

POWER BRAKE CYLINDER

Removal

1.
Remove vacuum hose from vacuum check valve.

2.
Disconnect hydraulic lines at main cylinder.

Disconnect push rod at brake pedal assembly.

Remove nuts and lock washers securing power unit

to fire wall, and remove power unit from engine

compartment.
3.

4.

NOTE:
Chevy

to fire wall.
has a three stud attachment

Repair procedures for the power cylinder are outlined

in the Brake Section of the Overhaul Manual-for service
of the main cylinder refer to applicable portion of

"Standard Brakes" in this manual.

Installation

1.
Mount the power brake assembly in place and install

the attaching nuts and lock washers.

2.
Attach vacuum line to check valve.

3.
Secure hydraulic lines to main cylinder.

4.
Attach push rod to brake pedal assembly, and check

operation of stop light.

5. Bleed brakes as outlined in this section.

CAUTION: After replacing the unit on the vehi-

cle,
start the engine and allow vacuum to build

up before applying the brake.

CHEVROLET CHASSIS SERVICE