1992 MAZDA PROTEGE wheel

CONVENTIONAL BRAKE SYSTEM
TROUBLESHOOTING GUIDE
Problem Possible cause Remedy Page
Poor braking
Leakage of brake fluid Repair P- 7
Air in system Bleed air P- 6
Worn pad or lining Replace P-l 8,23,28
Brake fluid, grease, oil, or water on pad or lining Clean or replace P-18,23,28
Hardening of pad or lining surface or poor contact Grind or replace P-l 8,23,28
Malfunction of disc brake piston Replace P-l 9,24
Malfunction of master cylinder or wheel cylinder Repair or replace P-l 0,21,26,
28,30
Malfunction of power brake unit Repair or replace P-16
Malfunction of check valve (vacuum hose) Replace P-15
Damaged vacuum hose Replace -
Deterioration of flexible hose Replace -
Malfunction of dual proportioning valve Replace P-17 Brakes pull to one
Worn pad or lining Replace P-l 8,23,28 side Brake fluid, grease, oil, or water on pad or lining Clean or replace -
Hardening of pad or lining surface or poor contact Grind or replace
Abnormal wear or distortion of disc, drum, pad, or lining Repair or replace P-l 8;3,28
Malfunction of automatic adjuster Repair or replace -
Looseness of backing plate I dust cover mounting bolts Tighten Section M
Malfunction of wheel cylinder Repair or replace P-21,26,30
Improperly adjusted wheel alignment Adjust Section R
Unequal tire air pressures
Adjust Section Q Brakes do not
No brake pedal play Adjust P- 9 release Improperly adjusted push rod clearance Adjust P-11
Clogged master cylinder return port Clean -
Weak brake pad or shoe return spring Replace -
Wheel cylinder not returning properly
Clean or replace
Malfunction of piston seal of disc brake Replace P-l;,24
Excessive runout of disc plate
Replace P-20,25 Pedal goes too far
Improperly adjusted pedal play Adjust P- 9 (too much pedal Worn pad or lining
Replace P-18,23,28 stroke) Air in system
Bleed air P- 6 Abnormal noise or
Worn pad or lining
Replace P-18,23,28 vibration during Deteriorated pad or lining Grind or replace - braking Brakes do not release Repair -
Foreign material or scratches on disc plate or drum con- Clean -
tact surface
Looseness of backing plate / dust cover or caliper Tighten
Section M,
mounting bolts P-l 9,24
Damaged disc or drum contact surface Replace -
Poor contact of pad or fining Repair or replace
P-18,23,28
Insufficient grease on sliding parts Grease - Steering wheel pulls
Dragging brake Repair - to one side Malfunction of steering system -
Section N
Damaged or unbalanced wheel(s) -
Section Cl
Incorrect tire pressure -
Section Q
Malfunction of suspension -
Section R
mm> IAn\, ,.e
P-5

CONVENTIONAL BRAKE SYSTEM
G ‘lW /
03UOPX-01
03UOPX-01’
03UOPX-01,
23UOPX-00
Inspection, on-vehicle
Brake pipe
Check for cracks, damage, and corrosion of the brake pipe.
Replace the pipe or flare nut(s) if necessary.
Flexible hose
Check for scars, cracks, and swelling of flexible hose. Replace
the hose if necessary.
Removal
1. Remove the brake pipe with the SST.
2. Disconnect the clip and remove the flexible hose from the
bracket.
Installation
1. Fix the flexible hose in the bracket and connect the clip to it.
2. Connect the flexible hose to the brake pipe and tighten the
flare nut with the SST.
Caution
l Verify that the hose is not twisted.
l Verify that the hose does not contact other parts
when the vehicle bounces or when the steering
wheel is turned fully right or left.
Tightening torque:
13-22 N*m (1.3-2.2 m-kg, 9.4-16 ft-lb)
P-7

CONVENTIONAL BRAKE SYSTEM
FRONT BRAKE (DISC)
Quick Inspection, On-vehicle
Disc pad
1. Jack up the front of the vehicle and support it with safety
stands.
2. Remove the wheels.
3. Verify the remaining thickness of the pads.
Thickness: 2.0mm (0.08 in) min.
Replacement
Disc pad
1. Remove in the order shown in the figure.
2. Install in the reverse order of removal, referring to
Installation Note.
23UOPX-oc
1. M-spring 4. Disc pad 5. Anti-squeak shim
2. W-pin Installation Note . . . . . . . . Below 6. Outer shim
3. Pad pin Inspection ,.,..,... page P-20 7. Inner shim
P-18
IBUOPX-01
Installation note
Disc pad
When installing the disc pads, push the piston fully inward with
the
SST and an old pad.

Removal / Installation
Caliper
1. Remove in the order shown in the figure.
2. Install in the reverse order of removal.
CONVENTIONAL BRAKE SYSTEM P
1
39-49 (4.0-5.0, 2! 3-36)
@ .-- . . -3
16-
‘(

N.m (m-kg, Mb)
23UOPX-023
1. Flexible hose 5. Caliper
2. Pad pin Disassembly / Inspection I
3. Disc pad assembly Assembly , . , , . , . . . . . . . . . . , . . . . . . . . . . . . . . . . . page P-21
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page P-20 6. Guide plate
7. Disc plate
Inspection . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page P-20 4. Bolt
Caution
Take the following steps after installation:
l Add fluid and bleed the air. (Refer to page P-6.)
l Check for fluid leakage. (Refer to page P-8.)
l Depress the brake pedal a few tlmes and check that
the rear brakes do not drag While rotating the wheel.
03UOPX-052 P-19

P CONVENTIONAL BRAKE SYSTEM
23UOPX-01. 5
84
03UOPX-055
Inspection
Check for the following and repair or replace parts as
necessary.
Disc pad assembly
1. Check for oil or grease on the facing, abnormal wear or
cracks, and deterioration or damage from heat.
2. Measure the thickness of the lining.
Specified thickness: 1Omm (0.39 in)
Minimum : 2.0mm (0.08 in)
3. Check visually for damage or wear of the guide plate.
Disc plate
1. Measure the thickness of the disc plate.
Standard: 22mm (0.87 in)
Minimum: 20mm (0.79 in)
2. Measure the runout at the outer edge of the contact sur-
face of the disc pad.
Runout: O.lmm (0.004 in) max.
Caution
l There must be no wheel bearing looseness.
l The measurement location is the outer edge of the
disc plate surface.
P-20

CONVENTIONAL BRAKE SYSTEM
REAR BRAKE (DISC)
Quick Inspection, On-vehicle
Disc pad
1. Jack up the rear of the vehicle and support it with safety
stands.
2. Remove the wheels.
3. Verify that the remaining thickness of the pads.
Thickness: l.Omm (0.04 in) min.
1 SUOPX-011
Replacement
Disc pad
1. Remove in the order shown in the figure, referring to Removal Note.
2. Install in the reverse order of removal, referring to Installation Note.
12-16 (1.2-l .6, 6.7-l 2
N.m (m-kg, &lb)
,,?I lftPY.rl17
1. Screw plug
2. Manual adjustment gear
Removal Note, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Below
Installation Note . . . . . . . . . . . . . . . . . . . . . . . . . . page P-24 _.,--. ,. ., . .
4. M-spring
5. Disc pad assembly
Inspection . , . , , . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . page P-25
6. Shim
3. Lock bolt 7. Guide plate
Removal note
Manual adjustment gear
Turn the manual adjustment gear counterclockwise with an
Allen wrench to pull the brake caliper piston inward. (Turn until
it stops)
03UOPX-062
P-23

CONVENTIONAL BRAKE SYSTEM
Installation note
Manual adjustment gear
1. Turn the manual adjustment gear clockwise until the brake
pads just touch the disc pIaTe.
2. Return the manual adjustment gear l/3-turn
Removal / Installation
Caliper
1. Jack up the rear of the vehicle and support it with safety stands.
2. Remove the wheels.
3. Remove in the order shown in the figure, referring to
Removal Note.
4. Install in the reverse order of removal, referring to Installation Note.
5. Tighten all nuts and bolts to the specified torques, referring to the figure.
@ 22-29 (2.2-3.0, 16-22)

23-30 (2.2-3.1, 16-
N.m (m-kg, R-lb)
23UOPX-00
1. Parking cable 7. Caliper
Removal I Inspection / Disassembly / Inspection /
Installation . . . . . . . . . . . . . . . . . . . . . . ,.,........ page P-32 Assembly ,.....*........................... page P-26
2. Connecting bolt 8. Disc pad assembly
3. Brake hose Replacement ,...,.,.,.,........*........... page P-23
4. Screw plug Inspection . . . . . . . ..*......................... page P-25
5. Manual adjustment gear 9. Bolt
Removal Note . . . . . . . . . . . . . . . ,,..,.,....... page P-23 10. Mounting support
Installation Note ,....,.,..,.,...,., ,...,., page P-24 11, Disc plate
6. Lock bolt Inspection .,...........*..................... page P-25
After installation:
(1) Add brake fluid and bleed air. (Refer to page P-6.)
(2) Adjust the parking brake lever stroke. (Refer to page P-31 .)
(3) Depress the brake pedal a few times and check that the rear brakes do not drag excessively while
rotating the wheel by hand.
P-24

CONVENTIONAL BRAKE SYSTEM P
23UOPX-02
Inspection
Check for the following and repair or replace parts as
necessary.
Disc pad assembly
1. Oil or grease on facing
2. Abnormal wear or cracks
3. Deterioration or damage by heat
4. Remaining lining thickness
Specified thickness: 8.0mm (0.31 in)
Minimum: l.Omm (0.04 in)
Disc plate
1. Runout
Runout: O.lmm (0.004 in) max.
Caution
l There must be no wheel bearing looseness.
l The measurement location is the outer edge of the
disc pad contact surface.
2. Wear or damage
Thickness
Standard: 9.0mm (0.35 in)
Minimum: 7.0mm (0.28 in)
P-25