1987 MAZDA 626 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.
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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.
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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.
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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
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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.
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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.
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1 1 REAR DRUM BRAKE
Torque specification
1. Brake shoe 2. Brake drum
98—177 N m (10—18 m-kg, 72—130 ft-lb)
3. Locknut
86U11X-122
installation Note
Brake shoes
1. Apply grease to:
(1) Shoe and cylinder contact points
(2) Shoe anchor points
(3) Projections of backing plate
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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.
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10. Install the return spring (upper).
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1 1 REAR DRUM BRAKE
Brake drum
1. Move the quadrant against the backing plate with
a screwdriver and increase the shoe clearance.
2. Install the brake drum.
Note
The shoe clearance will be automatically ad-
justed by applying the parking brakes.
76G11X089
Locknut
Tighten the new locknut to the specified torque and
securely stake it to the spindle groove.
Tightening torque:
98—177
N
m (10—18 m-kg, 72—130 ft-lb)
Caution
Do not use a pointed tool for staking.
86U11X-129
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