Subaru Subaru Legacy 1989-1993 Brakes Specifications
Explore the complete brake specifications for the 1989-1993 Subaru Legacy, including rotor sizes, pad dimensions, caliper types, and maintenance tips. Ideal for repairs, upgrades, and ensuring optimal braking performance.
Overview Specifications
This document provides detailed specifications and technical information about the braking system of the 1989-1993 Subaru Legacy. It is designed to assist mechanics, enthusiasts, and owners in understanding the brake components, maintenance requirements, and performance characteristics. Use the search and navigation instructions to quickly locate specific details or browse through sections for comprehensive insights.
How to Use
Use the search functionality by entering keywords related to brake components, such as 'rotor diameter' or 'brake pad material'. This will highlight relevant sections and subsections for quick access.
Navigate through the document by scrolling through sections or using the table of contents. Each section is organized into subsections with detailed technical points for easy reference.
Key Specifications
Front Rotor Diameter
277 mm
Rear Drum Diameter
200 mm
Brake Fluid Type
DOT 3/DOT 4
Caliper Piston Diameter
54 mm
Brake Pad Thickness
15 mm
Available Specifications
Front Brakes
This section covers the specifications and details of the front braking system, including rotor size, caliper type, and pad dimensions. It also provides insights into maintenance tips and common issues.
Front Brakes
This section covers the specifications and details of the front braking system, including rotor size, caliper type, and pad dimensions. It also provides insights into maintenance tips and common issues.
Rotor Specifications
- Diameter: 277 mm
- Thickness: 22 mm
- Material: Cast iron
- Ventilation: Vented design
- Minimum thickness after wear: 20 mm
Caliper Details
- Type: Single-piston floating caliper
- Material: Aluminum alloy
- Piston diameter: 54 mm
- Brake pad attachment: Clip-on design
Brake Pads
- Material: Semi-metallic
- Dimensions: 120 mm x 60 mm x 15 mm
- Wear indicator: Integrated
- Replacement interval: Approximately 50,000 km
Rear Brakes
This section provides information on the rear braking system, including drum and disc brake configurations, depending on the model. It also includes maintenance guidelines and performance details.
Rear Brakes
This section provides information on the rear braking system, including drum and disc brake configurations, depending on the model. It also includes maintenance guidelines and performance details.
Drum Brake Specifications
- Diameter: 200 mm
- Width: 40 mm
- Material: Cast iron
- Shoe lining material: Organic
- Adjustment: Manual or automatic
Disc Brake Specifications
- Diameter: 266 mm
- Thickness: 10 mm
- Material: Cast iron
- Caliper type: Single-piston
- Pad material: Ceramic
Brake Fluid and Hydraulics
This section focuses on the brake fluid requirements, hydraulic system components, and bleeding procedures. It also includes safety precautions and compatibility information.
Brake Fluid and Hydraulics
This section focuses on the brake fluid requirements, hydraulic system components, and bleeding procedures. It also includes safety precautions and compatibility information.
Brake Fluid Specifications
- Type: DOT 3 or DOT 4
- Capacity: Approximately 0.5 liters
- Boiling point: ≥ 230°C (DOT 3)
- Compatibility: Synthetic or mineral-based
Hydraulic System
- Master cylinder diameter: 22.2 mm
- Brake line material: Steel with rubber hoses
- ABS availability: Optional on higher trims
- Bleeding procedure: Manual or pressure method
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Brakes Specifications
Overview
- Type
- Hydraulic disc (front), drum (rear)
- Configuration
- Dual-circuit diagonal split
- Platform
- Subaru Legacy 1989-1993
- Material
- Cast iron rotors, steel drums
- Location
- Front and rear axles
Dimensions
- Front Rotor Diameter
- 10.2 inches / 259 mm
- Front Rotor Thickness
- 0.43 inches / 11 mm
- Rear Drum Diameter
- 7.87 inches / 200 mm
- Rear Drum Width
- 1.57 inches / 40 mm
- Brake Pad Length
- 5.12 inches / 130 mm
- Brake Pad Width
- 2.36 inches / 60 mm
- Brake Fluid Capacity
- 0.5 liters / 16.9 fl oz
Materials
- Rotors
- Cast iron with anti-corrosion coating
- Drums
- High-strength steel
- Brake Pads
- Semi-metallic friction material
- Brake Lines
- Reinforced rubber with steel braiding
Features
- Braking System
-
- Dual-circuit hydraulic system
- Diagonal split for safety
- Front disc brakes for better stopping power
- Rear drum brakes for cost efficiency
- Components
-
- Ventilated front rotors
- Self-adjusting rear drums
- Dual-piston front calipers
- Integrated parking brake
- Performance
-
- ABS available on higher trims
- Progressive brake pedal feel
- Low brake fade under heavy use
- Effective heat dissipation
Safety Features
- System Redundancy
-
- Dual-circuit design
- Diagonal split ensures partial braking if one circuit fails
- Emergency Features
-
- Parking brake integrated with rear drums
- ABS prevents wheel lock-up
- Durability
-
- Corrosion-resistant rotors
- Reinforced brake lines
Comfort Features
- Pedal Feel
- Progressive and responsive
- Noise Reduction
-
- Anti-squeal shims on brake pads
- Drum brakes reduce noise
- Maintenance Ease
-
- Self-adjusting rear drums
- Easy-to-replace brake pads
Accessories
- Upgrades
-
- Performance brake pads
- Slotted rotors
- Stainless steel brake lines
- Tools
-
- Brake caliper tool
- Drum brake spring tool
- Brake bleeder kit
- Consumables
-
- DOT 3 or DOT 4 brake fluid
- Brake cleaner spray
- Anti-seize compound
Maintenance
- Service interval
- Every 12,000 miles or 12 months
- Service Items
-
- Inspect brake pads and rotors
- Check brake fluid level
- Inspect brake lines for leaks
- Adjust rear drum brakes
- Test parking brake functionality
- Maintenance Notes
-
- Replace brake fluid every 2 years
- Inspect ABS system during major services
Warranty
- Brake Pads
- Miles: 24,000Years: 2Coverage: Replacement for wear and tear
- Rotors
- Miles: 50,000Years: 5Coverage: Replacement for warping or cracking
- Brake Lines
- Miles: 100,000Years: 10Coverage: Replacement for leaks or corrosion
- Labor
- Miles: 12,000Years: 1Coverage: Free adjustment and inspection
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Precision casting for rotors
- CNC machining for calipers
- Heat treatment for durability
- Quality Control
- Rotor inspection: Ultrasonic testing for defectsCaliper Testing: Pressure and leakage testsFinal Assembly: Full system pressure test
- Sustainability Practices
-
- Recycled materials in brake pads
- Eco-friendly brake fluid disposal
- Production Metrics
- Annual Output: 500,000 unitsDefect Rate: 0.01%
Service Information for brakes Service
Maintenance and service requirements specific to this component
- Inspect brake pads and rotors
- Check brake fluid level
- Adjust rear drum brakes
- Test parking brake functionality
- Inspect brake lines for leaks
Ensure proper brake fluid level and quality
- Replace brake pads if necessary
- Resurface or replace rotors
- Flush and replace brake fluid
- Inspect ABS system
- Check caliper operation
Use only DOT 3 or DOT 4 brake fluid
- Replace rear brake shoes
- Inspect and replace brake lines if needed
- Test ABS functionality
- Overhaul parking brake system
- Perform full system pressure test
Major service requires specialized tools
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 Are brake pads and rotors from other Subaru models compatible with the 1989-1993 Legacy?
Are brake pads and rotors from other Subaru models compatible with the 1989-1993 Legacy?
Brake pads and rotors for the 1989-1993 Subaru Legacy are model-specific due to unique sizing and mounting configurations. While some components from other Subaru models may appear similar, compatibility is not guaranteed. Always verify part numbers and specifications before purchasing. For example, front rotors are typically 10.2 inches in diameter, while rear rotors are 10.3 inches. Using incompatible parts can compromise braking performance and safety.
Q2 What is the recommended maintenance schedule for the Legacy's braking system?
What is the recommended maintenance schedule for the Legacy's braking system?
The braking system should be inspected every 12,000 miles or annually, whichever comes first. Brake pads should be replaced when worn to 3mm or less, and rotors should be resurfaced or replaced if they exhibit scoring, warping, or thickness below the minimum specification. Brake fluid should be flushed every 30,000 miles or 2 years to prevent moisture buildup and maintain optimal performance. Regular inspections of brake lines and hoses for leaks or wear are also recommended.
Q3 How do I replace the brake pads on a 1989-1993 Subaru Legacy?
How do I replace the brake pads on a 1989-1993 Subaru Legacy?
To replace brake pads, first, lift the vehicle and remove the wheels. Use a wrench to remove the caliper bolts and carefully detach the caliper, ensuring the brake hose is not strained. Remove the old pads and inspect the rotors for wear. Compress the caliper piston using a C-clamp or brake tool. Install the new pads, reattach the caliper, and secure the bolts. Reinstall the wheels and lower the vehicle. Test the brakes before driving to ensure proper function.
Q4 What should I do if my Legacy's brakes feel spongy or unresponsive?
What should I do if my Legacy's brakes feel spongy or unresponsive?
Spongy brakes often indicate air in the brake lines or low brake fluid. Begin by checking the brake fluid level and topping it off if necessary. If the issue persists, bleed the brake system to remove air bubbles. Inspect the brake lines for leaks or damage. If the problem continues, the master cylinder or brake booster may be faulty and require replacement. Always address braking issues promptly to ensure safety.
Q5 How can I optimize the braking performance of my 1989-1993 Legacy?
How can I optimize the braking performance of my 1989-1993 Legacy?
To optimize braking performance, use high-quality brake pads and rotors designed for your Legacy. Consider upgrading to performance brake pads for improved stopping power and reduced fade. Ensure proper bedding-in of new pads by following the manufacturer's instructions. Regularly inspect and maintain the braking system, including fluid flushes and rotor resurfacing. Avoid aggressive driving habits that can overheat the brakes and reduce their lifespan.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
1989-1993 Subaru Legacy Service Manual
Coming SoonComprehensive guide covering brake system maintenance, repair, and troubleshooting for the 1989-1993 Subaru Legacy.
Subaru Technical Service Bulletin: Brake System Updates
Coming SoonDetails updates and fixes for common brake system issues in the 1989-1993 Legacy, including rotor warping and pad wear.
Subaru Legacy Brake Parts Catalog
Coming SoonCatalog listing OEM and aftermarket brake components compatible with the 1989-1993 Legacy, including part numbers and specifications.
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Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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