1991 MAZDA MIATA brakes

Raise and support vehicle. Remove rear wheels. Remove brake rotor. Remove upper and lower return springs.
See Fig. 21
. Remove hold-down springs and pins. Remove parking brake shoes. Separate adjuster and
operating lever. Minimum lining thickness is .04" (1 mm).
Fig. 21: Exploded View of Parking Brake Assembly (929)

Courtesy of MAZDA MOTORS CORP.
Installation
Connect operating lever to parking brake cable. Set marked side (with arrow) of operating lever to front side.
Position shoes and adjuster. Ensure threaded side of adjuster faces forward on left wheel and rearward on right
wheel. To complete installation, reverse removal procedure. Adjust parking brake. See PARKING BRAKE
under ADJUSTMENTS
at beginning of article.
REAR AXLE BEARING & OIL SEAL
Removal (B2200 & B2600i)
1. Remove wheel and brake drum. Disconnect parking brake cable and brake line. Remove backing plate
bolts. Remove backing plate and rear axle assembly. Remove axle bearing lock nut using Holder (49-
NOTE: For information on models with sealed wheel bearings, see appropriate article
in the SUSPENSION Section.

1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
Microsoft
Sunday, July 05, 2009 2:18:08 PMPage 31 © 2005 Mitchell Repair Information Company, LLC.

S120-645A) and Wrench (49-0603-635A).
2. Using Puller (49-S120-520A) and Adapter (49-S120-523A), remove rear axle bearings. Remove oil seal
from axle housing.
Installation
1. Install oil seal in axle housing. Install bearing inner race. Install and position oil seal flush with end of
axle casing. Apply multipurpose grease to oil seal lip. Install spacer with concave side facing backing
plate.
2. Press axle bearing onto axle shaft. Using wrench, install and tighten lock nut to 145-217 ft. lbs. (197-295
N.m). Install axle shaft assembly. Install backing plate. Reconnect brake line and parking brake cable.
Install brake drum and wheel. Bleed brake system.
MASTER CYLINDER
Removal
1. Disconnect fluid level sensor coupler (if equipped). Disconnect and plug hydraulic lines at master
cylinder to prevent entry of dirt and loss of fluid.
2. Remove nuts attaching master cylinder to firewall or power brake unit. Remove master cylinder from
vehicle. On RX7, remove proportioning valve by-pass bolt.
Installation
1. Place Adjustment Gauge (49-F043-001) onto master cylinder. Turn screw on adjuster gauge until it
contacts piston. Remove adjuster gauge. Apply 19.7 in. Hg to power brake unit.
2. Invert adjuster gauge and place it on power brake unit. Adjust push rod on power brake unit until there is
no clearance between push rod and adjuster gauge screw. Install master cylinder. Bleed hydraulic system.
POWER BRAKE UNIT
Removal & Installation
1. Remove master cylinder from power brake unit. See MASTER CYLINDER under REMOVAL &
INSTALLATION . Disconnect vacuum line at power brake unit. From inside vehicle, remove cotter pin
and clevis pin. Separate push rod from brake pedal.
2. Remove power brake unit-to-firewall nuts. Remove power brake unit. See Fig. 22
To install, reverse
removal procedure. Bleed hydraulic system. NOTE: Left wheel lock nut has left-hand threads.

1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
Microsoft
Sunday, July 05, 2009 2:18:08 PMPage 32 © 2005 Mitchell Repair Information Company, LLC.

Fig. 22: Removing Master Cylinder & Power Brake Unit (Typical)
Courtesy of MAZDA MOTORS CORP.
OVERHAUL

1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
Microsoft
Sunday, July 05, 2009 2:18:08 PMPage 33 © 2005 Mitchell Repair Information Company, LLC.

Fig. 23: Rear Caliper Assembly (Miata, Protege & 323)
Courtesy of MAZDA MOTORS CORP.

1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
Microsoft
Sunday, July 05, 2009 2:18:08 PMPage 34 © 2005 Mitchell Repair Information Company, LLC.

Fig. 24: Master Cylinder (Navajo).
Courtesy of MAZDA MOTORS CORP.

1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
Microsoft
Sunday, July 05, 2009 2:18:08 PMPage 35 © 2005 Mitchell Repair Information Company, LLC.

Fig. 25: Master Cylinder (929).
Courtesy of MAZDA MOTORS CORP.

1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
Microsoft
Sunday, July 05, 2009 2:18:09 PMPage 36 © 2005 Mitchell Repair Information Company, LLC.

Fig. 26: Typical Master Cylinder (Except Navajo & 929)
Courtesy of MAZDA MOTORS CORP.
SPECIFICATIONS
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS
ApplicationFt. Lbs. (N.m)
Backing Plate (Rear)
B2200 & B2600i 2WD72-87 (98-118)
B2600i 4WD65-80 (88-108)
Navajo25-35 (34-47)
All Others33-43 (45-58)
Caliper Guide Bolt
B2200 & B2600i23-30 (31-41)

1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
Microsoft
Sunday, July 05, 2009 2:18:09 PMPage 37 © 2005 Mitchell Repair Information Company, LLC.

Miata
Front
Lower58-65 (78-88)
Upper33-40 (45-54)
Rear33-43 (45-59)
MPV61-69 (83-93)
MX-6 & 626
Front23-30 (31-41)
Rear12-17 (16-24)
Protege & 323
Front(1)
Rear33-43 (45-59)
RX7
Front
Single-Piston Caliper23-30 (31-41)
4-Piston Caliper(1)
Rear12-17 (16-24)
929
Front61-69 (83-93)
Rear12-17 (16-24)
Caliper Mounting Bracket Bolt
B2200, B2600i & MPV65-80 (88-108)
Miata
Front36-51 (49-69)
Rear33-43 (45-59)
MX-6 & 626
Front58-72 (78-98)
Rear33-49 (45-67)
Protege & 323
Front(1)
Rear33-43 (45-59)
RX7
Front
Single-Piston Caliper58-72 (78-98)
4-Piston Caliper(1)
Rear33-40 (45-54)
929
Front58-86 (78-117)
Rear33-50 (45-68)
Hub Bolt (4WD)22-25 (30-34)

1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
Microsoft
Sunday, July 05, 2009 2:18:09 PMPage 38 © 2005 Mitchell Repair Information Company, LLC.