wheel MAZDA 626 1987 Workshop Manual

REAR DRUM BRAKE 1 1
15. Brake pipe
16. Wheel cylinder assembly
86U11X-109
17. Gasket
18. Backing plate
Removal Note
Locknut
Uncrimp the locknut, and remove it.
Caution Do not reuse the locknut.
86U11X-110
Brake drum
If the drum is difficult to remove, push the operating
lever stopper (at backing plate) upward to release the
operating lever and increase shoe clearance.
86U11X-111
11-57

REAR DRUM BRAKE 1 1
DISASSEMBLY AND ASSEMBLY OF WHEEL CYLINDER
1. Disassemble in the sequence shown in the figure.
2. Inspect all parts, referring to inspection note.
3. Assemble in the reverse order of disassembly, referring to assembly note for the specially marked
parts.
Caution
Do not damage the piston or cylinder. Do not let foreign material into the cylinder.
Note Use new piston cups when installing.
76G11X-087
1. Dust boot
2. Piston
3. Piston cup
4. Spring
5. Rubber cap
6. Bleeder screw
7. Steel ball
8. Wheel cylinder body
V ^
Inspection Note
Check the following and repair or replace any faulty
parts.
1. Weak or broken spring
2. Worn, rusted, or damaged wheel cylinder
86U11X-115
11—59

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

REAR DRUM BRAKE 1 1
5. Fit of drum and lining
(1) Apply chalk to the inside of the drum.
(2) Rub the shoe against the drum.
(3) Check lining to drum contact.
(4) After checking, remove chalk.
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 page to 11—65.)
(3) Depress the brake pedal a few times and check that the rear brakes do not drag while the wheels
are being rotated.
Torque specification
86U11X-120
INSTALLATION
1. Install in the reverse order of removal.
76G11X-050
11—61

REAR DRUM BRAKE 1 1
2. Install the operating lever assembly through the
backing plate.
3. Install the return spring to the backing plate (re-
verse side) and the operating lever.
86U11X-124
4. Install the shoe (trailing side) to the operating le-
ver, then to the wheel cylinder and anchor plate.
5. Fix the shoe with the hold spring and hold pin.
6. Install the anti-rattle spring.
86U11X-125
7. Install the return spring (lower) to the shoes (trail-
ing side and leading side).
8. Install the shoe leading side to the operating lever,
then to the wheel cylinder and anchor plate.
9. Fix the shoe with the hold spring and hold pin.
86U11X-126
—c^Uf5
>5
—/ / wr >-"W jtnc ^sy
10. Install the return spring (upper).
86U11X-127
11-63

1 1 PARKING BRAKE
REMOVAL AND INSTALLATION OF PARKING BRAKE LEVER
1. Block the wheels firmly.
2. Release the parking brakes.
3. Remove in the sequence shown in the figure.
4. Inspect all parts, referring to inspection note.
5. Install in the reverse order of removal, referring to installation note for specially marked parts.
6. After installation:
Adjust the parking lever stroke. (Refer to page 11—65.)
(1.8—2.5 m-kg, 13-18 ft-lb)
76G11X-051
1. Rear console 4. Adjust nut 7. Button
2. Parking brake switch 5. Parking brake lever 8. Spring
3. Clip 6. Cover
11-66

1 1 PARKING BRAKE
REMOVAL OF PARKING BRAKE CABLE
1. Block the wheels firmly.
2. Remove the rear console. (Refer to page 11—66.)
3. Release the parking brake and remove the adjust nut of the parking brake lever. (Refer to page
11—66.)
4. Jack up the vehicle and support it with safety stands.
5. Remove the parking brake cable in the sequence shown in the figure.
76G11X-052
1. Front parking cable 3. Parking brake cable (left)
2. Spring 4. Parking brake cable (right)
11-68

PARKING BRAKE 1 1
INSTALLATION OF PARKING BRAKE CABLE
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) Adjust the parking brake lever stroke. (Refer to page 11—65.)
(2) Depress the brake pedal a few times and check that the rear brakes do not drag while the wheels
are being rotated.
Torque specifications
Rear drum brake
76G11X-053
11-69

ANTI-LOCK BRAKE SYSTEM (ABS) 1 1
ANTI-LOCK BRAKE SYSTEM (ABS)
STRUCTURAL VIEW
1. Hydraulic unit 4. Sensor rotor (front) 7. Wheel speed sensor (rear)
2. Relay box 5. Wheel speed sensor (front) 8. Sensor rotor (rear)
3. Control unit 6. Check connector
11—71

ANTI-LOCK BRAKE SYSTEM (ABS) 1 1
TROUBLESHOOTING
Precaution
Conditions that are not malfunctions
1. It may happen that vibration is felt in the steering wheel, body, and/or brake pedal when the ABS
is functioning; such vibration is simply an indication that the system is functioning.
2. Sound of the pump motor operating, accumulator pressure being released, or the relay operating
may be heard from the engine compartment when the engine is started as the system is being auto-
matically checked.
3. The ABS pump motor may be automatically activated even though the ABS is not operating.
4. The ABS warning light may illuminate under any of the following conditions:
• When the vehicle is traveling on snow or ice with the parking brake activated or a brake dragging
at one wheel.
• When different-sized tires are used.
• When tires of different gripping performance are used.
• When (while the vehicle is jacked up or stuck) only the front wheels are spun for 20 seconds or more.
• When there is insufficient battery voltage.
Note
Under the above conditions, the warning light will not illuminate a second time when the
ignition is switched OFF then back ON, and there will be no memory entry to the control
unit of a problem.
Troubleshooting notes
The ABS is composed of electrical components, mechanical components (hydraulic unit), and the com-
ponents of the standard brake system.
Fundamentally, malfunction of the ABS electrical or mechanical components is judged by the self-
diagnosis function within the ABS control unit. And malfunctions are indicated by the warning light
in the instrument panel.
The location
of
a malfunction is indicated by the technician switching the system to the diagnosis-indication
mode.
The self-diagnosis and indication functions must be used when malfunctions of the ABS are being
diagnosed.
76G11X-091
11—73