brake fluid MAZDA 626 1987 Repair Manual

POWER BRAKE UNIT 1 1
INSTALLATION
1. Install in the reverse order of removal, referring to installation note for specially marked parts.
2. Tighten all nuts and bolts to the specified torque, referring to torque specifications.
3. After installation:
(1) Add fluid and bleed the air. (Refer to page 11—9.)
(2) Check all parts for fluid leakage.
(3) Make an on-vehicle check of the unit (Refer to page 11—27.)
(4) Verify that the vacuum hose does not contact other parts.
Torque specifications
76G11X-035
1. Vacuum hose and check valve
11—33

1
1
DUAL PROPORTIONING VALVE
B6U11X-060
DUAL PROPORTIONING VALVE
FUNCTION CHECK
1. Connect
two
pressure gauges [9,810
kPa (100

kg/cm2,1,422 psi)
]
to the brake pipes and adap-
tors
as
shown
in
the
figure.
Adaptor and flare
nut
tightening torque:
13—22 N m (1.3—2.2 m-kg, 9—16 ft-lb)
Note
Disconnect and connect the brake pipes with
the
SST
(49
0259 770B).
2. Bleed
air
from
the
brake system.
(Refer
to
page 11—9.)
76G11X-043
t 0}
^
£
»

Rear

brake
pressu
kPa
(kg/cm2,
p
>
DO

Rear

brake
pressu
kPa
(kg/cm2,
p
>
DO
TTi
A
B

Master cylinder pressure
kPa
(kg/cm2,
psi)

76G11X-044
Depress the brake pedal until the master cylinder
pressure equals A; then measure rear brake pres-
sure
A'.

Depress the brake pedal again; apply additional
pressure until
A
equals
B;
then measure pressure
B'.
If the measurements
are
not
within specification,
replace
the
valve assembly.
Install the brake pipes to the valve,
and
bleed
air

from
the
brake system.
Specification
Fluid pressure
kPa
(kg/cm2,
psi)

A A' B B'
Except General
LHD
and
RHD

1,962 (20,284)
1,962 ±
196
(20
± 2,
284
± 28)
6,867 (70,995)
3,434 ±
196
(35
± 2,
498
± 28)

General
LHD
and
RHD
2,943 (30,427)
2,943 ±
196
(30
± 2,
427
± 28)

6,867 (70,995) 4,120 ±
196
(42
± 2,
597
± 28)

11-38

DUAL PROPORTIONING VALVE 1 1
REMOVAL AND INSTALLATION
1. Remove in the sequence shown in the figure, referring to removal and installation note for specially
marked parts.
2. Install in the reverse order of removal.
3. After installation:
(1) Add brake fluid and bleed the air. (Refer to page 11—9.)
(2) Check the brake lines for fluid leakage.
Caution
Brake fluid will damage painted surfaces. If it does get on a painted surface, wipe it off
immediately.
Except RF-CX
O
76G11X-045
1. Brake pipe 2. Dual proportioning valve
Removal and Installation Note
Brake pipe
Disconnect or connect the brake pipes with the SST.
76G11X-103
11-39

1 1 FRONT DISC BRAKE
REMOVAL
1. Loosen the wheel lug nuts.
2. Jack up the front of the vehicle and support it with safety stands.
3. Remove the wheels.
4. Remove in the sequence shown in the figure.
Warning Asbestos dust is a health hazard. Do not blow away brake dust with compressed air.
Caution
Brake fluid will damage painted surfaces. If it does get on a painted surface, wipe it off
immediately.
76G11X-078
1. Flexible hose
2. Caliper assembly
3. V-spring
4. Outer pad and shim
5. Inner pad and shim
6. Guide plate
7. Mounting support
8. Disc plate (Refer to section 9)
11—42

1 1 FRONT DISC BRAKE
86U11X-075
76G11X-081
86U11X-077
Inspection Note
Check the following and replace any faulty parts.
1. Cylinder and piston for wear or rust
2. Caliper body for damage or cracks
3. Boot for damage or poor sealing
Assembly Note
Application of grease
Coat the following parts with the grease supplied in
the seal kit.
1. Piston seal
2. Dust seal
3. Guide pin
4. Guide pin boot
5. Bushing
Piston
Coat the piston and the cylinder with brake fluid; then
insert the piston straight into the cylinder.
86U11X-078
11—44

1 1 FRONT DISC BRAKE
INSTALLATION
1. Install in the reverse order of removal.
2. Tighten all nuts and bolts to the specified torque, referring to torque specifications.
3. After installation:
(1) Add brake fluid and bleed air. (Refer to page 11—9.)
(2) Depress the brake pedal a few times and check that the front brakes do not drag excessively
while the wheels are being rotated.
Note
Refer to page 11—40 for pad installation.
Torque specifications
76G11X-047
11—46

REAR DISC BRAKE 1 1
REMOVAL
1. Loosen the wheel lug nuts.
2. Release the parking brakes.
3. Jack up the rear of the vehicle and support it with safety stands.
4. Remove the wheels.
5. Remove in the sequence shown in the figure.
Warning Asbestos dust is a health hazard. Do not blow away brake dust with compressed air.
Caution
Brake fluid will damage painted surfaces. If it does get on a painted surface, wipe it off
immediately.
76G11X-084
1. Parking brake cable
2. Flexible hose
3. Caliper assembly
4. V-spring
5. Pad and shim
6. Guide plate
7. Mounting support
8. Disc plate
(Refer to section 9)
11—49

REAR DISC BRAKE 1 1
INSTALLATION
1. Install in the reverse order of removal, referring to installation note for the specially marked parts.
2. Tighten all nuts and bolts to the specified torque, referring to torque specifications.
3. After installation:
(1) Add brake fluid and bleed air. (Refer to page 11—9.)
(2) Adjust the parking brake lever stroke. (Refer to page 11 —65.)
(3) Depress the brake pedal a few times and check that the rear brakes do not drag excessively
while the wheels are being rotated.
Note
Refer to page 11—47 for pad installation.
Torque specifications
1. Parking brake cable
Installation Note
Parking brake cable
Connect the parking brake cable end onto the oper-
ating lever; then fix it to the bracket by the locknut.
Caution
There must be no clearance between the ca-
ble end and the operating lever.
86U11X-107
11-55

1 1 REAR DRUM BRAKE
Cleaning of drum brake assembly
Use a vacuum cleaner or equivalent to clean the
brake assembly
Warning
Asbestos dust is a health hazard. When clean-
ing the brake assembly, do not use compressed
air or a brush.
86U11X-112
Brake pipe
Disconnect the brake pipe with the SST.
Caution
Brake fluid will damage painted surfaces. If it
does get on a painted surface, wipe it off im-
mediately.
86U11X-113
11-58

1 1 REAR DRUM BRAKE
86U11X-116
86U11X-117
76G11X-049
Assembly Note
Before assembly, apply brake fluid to the following
parts:
1. Piston cup
2. Cylinder inner wall
3. Piston
INSPECTION
Check the following and repair or replace any faulty
parts.
1. Scratches, uneven or abnormal wear inside drum
Note Repair by sanding if the problem is minor.
2. Drum inner diameter
mm (in)

Standard Maximum
(a) 200.0 (7.87) 201.5 (7.93)
(b) 228.6 (9.00) 230.1 (9.06)
(a): 13-inch wheel
in
General LHD and RHD models (b): Except 13-inch wheel
in
General LHD and RHD models

3. Peeling, cracking, or extremely uneven wear of
lining
4. Lining wear
Thickness: 1.0 mm (0.04 in) min.
Caution
When replacing the shoe assembly, replace
the left and right shoes at the same time as
a set.
86U11X-119
11-60