5A-1
ELCO-MORAINE POWER BRAKE
CONTENTS
OF
THIS
SECTION
SUBJECT
PAGE
SUBJECT
PAGE
5A-1
Inspection and Cleaning
•
• • 5A-4
5A-1 Power
Brake
5A-1
Master
Cylinder
.
Stop
Lamp
Switch—Remove and Replace . 5A-1
Air
Filter
Overhaul
Delco-Moraine Power
Brake
. . . 5A-1
Assemble
Brake
Unit
•
• • 5A-5
Master
Cylinder
Only—Remove
5A-1
Master
Cylinder—Assemble
.
• • 5A-5
Power
Brake
and Master
Cylinder
Power Piston—Assemble
•
• • 5A-5
Assembly—Remove
5A-1
Gauging
Procedure -
.
• • 5A-10
Over-all
Brake
Unit—Disassemble . . . .
5A-2
Power
Brake
Assembly—Install . . . .
.
• • 5A-10
Power Piston Assembly—Disassemble . . .
5A-3
Torque
Specifications
.
• • 5A-10
5A-4
•
• • 5A-11
CHECKS
AND
ADJUSTMENTS
ON CAR
1.
Check
for free operation of brake pedal. If
binding exists, check pivot points for binding and
lubricate
as required.
2.
Check
stop
light switch for proper setting and
operation.
3.
Check
fluid level in hydraulic cylinder reser-
voir.
Fluid
level should be as shown in Section 5.
4.
Check
vacuum line and connections
between
carburetor
and vacuum power cylinder for possible
vacuum
leaks.
5.
Check
engine
for
good
stall-free idle.
Correct
as required.
MINOR
REPAIRS
BLEEDING
BRAKES
Brakes
should be bled in the same manner as
standard
brakes, unless a balance valve is incorpo-
rated
in the system.
STOP
LAMP SWITCH
The
stop
lamp switch has a slip fit in the mounting
sleeve
which permits positive adjustment by pulling
the brake pedal up firmly against the
stop.
The pedal
arm
forces the switch
body
to slip in the mounting
sleeve
bushing to properly position switch.
REMOVE
1. Disconnect switch wires by removing plug at
stop
light switch.
2. Remove switch by turning out of bracket.
REPLACE
1. Position
stop
light switch in bracket and push
in
maximum distance.
2. Connect switch wires by inserting plug on
switch.
3.
Brake
pedal arm
moves
switch to correct dis-
tance on rebound.
Check
if pedal is in full return
position by lifting slightly by hand.
OVERHAUL DELCO-MORA1NE POWER ilAKE
MASTER
CYLINDER ONLY-REMOVE
Certain
repair operations, such as replacement of
master cylinder internal parts, permits the master
cylinder
to be removed by itself, leaving the power
cylinder
pedal and brackets in the car.
1. Remove hydraulic connections from master
cyl-
inder,
pump fluid from cylinder into a container and
dispose
of fluid. Cover cylinder
openings
and pipe
ends
to exclude dust,
dirt,
etc.
2. Remove master cylinder attaching nuts and re-
move
master cylinder from vacuum power section.
POWER
BRAKE
AND
MASTER CYLINDER
ASSEMBLY-REMOVE
1. Disconnect vacuum
hose
at vacuum check valve.
Plug
hose
and cover valve opening to exclude dust,
dirt,
etc. (Fig. 5A-1, 5A-2, 5A-3).
2. Disconnect pipes from master cylinder hydrau-
lic
ports and cover
openings
and pipe
ends
to exclude
dust,
dirt,
etc.
3.
Remove retainer and clevis pin from brake
pedal inside car.
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