forest city auto parts
High-Performance Brake Caliper Assembly for Commercial Vehicle Safety
1. Product Overview
In the demanding world of heavy-duty transportation, every component must deliver uncompromising reliability. Our premium Brake Caliper Assembly, a flagship product in the forest city auto parts catalog, is engineered to meet the rigorous safety standards of Class 8 trucks, trailers, and construction equipment. Manufactured from high-grade ductile iron and precision-machined to OE specifications, this caliper ensures consistent braking performance under extreme loads and high-temperature conditions. Whether you are retrofitting a fleet or sourcing for a new build, this component provides the stopping power your operations depend on.
2. Key Features
- High-Tensile Ductile Iron Construction: Resists cracking and deformation under heavy braking cycles, offering a service life exceeding standard cast iron units.
- Corrosion-Resistant Coating: An e-coat primer plus a top coat of automotive-grade paint protects against road salt, moisture, and debris, ensuring long-term durability in harsh environments.
- Precision-Machined Bore: Maintains a tight tolerance of ±0.02mm for the piston bore, reducing seal wear and preventing fluid bypass.
- High-Temperature Seal Kit: Includes EPDM rubber seals and dust boots rated for continuous operation up to 250°C (482°F).
- Direct Bolt-On Fitment: Designed as a direct replacement for Meritor, Dana, and Bendix systems, requiring no modification to existing mounting brackets.
- Rigid Guide Pin Design: Stainless steel guide pins with PTFE bushings reduce friction and ensure even pad wear across the rotor.
3. Technical Specifications
| Parameter | Specification |
|---|---|
| Material | Ductile Iron (ASTM A536, Grade 65-45-12) |
| Piston Diameter | 5.5 inches (139.7 mm) |
| Mounting Bolt Center (Inlet Side) | 5.25 inches (133.35 mm) |
| Maximum Operating Pressure | 1,500 psi (103 bar) |
| Brake Pad Type | 19.0 mm thick, organic/metallic compound |
| Weight | 28.5 lbs (12.9 kg) |
| Thread Size (Inlet Port) | 1/8" NPT or M10 x 1.5 (optional) |
| Operating Temperature Range | -40°F to +482°F (-40°C to +250°C) |
| Compatible Rotor Diameter | 15.0 - 16.5 inches |
4. Application Scenarios
This brake caliper is specifically designed for medium- to heavy-duty commercial vehicles where safety and reliability are non-negotiable. Typical applications include:
- Class 8 Tractor-Trailers: Ideal for line-haul trucks operating on interstate highways, where consistent fade-free braking is required.
- Dump Trucks & Mixers: Handles the high inertia loads of fully loaded vehicles on construction sites and steep grades.
- School Buses & Shuttles: Meets FMVSS 121 standards for air brake systems, ensuring safe stopping distances in urban traffic.
- Fire Apparatus: Capable of withstanding the thermal stress of repeated emergency braking events.
- Agricultural Equipment: Suitable for large tractors and sprayers that require precise braking control on uneven terrain.
5. Advantages
- Reduced Downtime: The robust design minimizes the frequency of rebuilds. Fleet managers using forest city auto parts report a 30% longer interval between brake overhauls compared to generic alternatives.
- Consistent Friction Output: The precision bore and high-quality piston seals ensure that the clamping force remains stable, even as brake fluid temperature rises during extended descents.
- Ease of Installation: Pre-lubricated guide pins and pre-installed bleeder screws reduce installation time by approximately 20% per axle.
- Global Compatibility: Available with both SAE and metric port threads, making it suitable for North American, European, and Asian truck chassis.
- Cost-Effective Rebuildability: Unlike some sealed units, this caliper can be rebuilt using standard seal kits, lowering the total cost of ownership over the vehicle's life.
6. Why Choose Us
When you source from forest city auto parts, you are choosing a partner with decades of experience in the heavy-duty aftermarket. Our manufacturing facility is ISO 9001:2015 certified, and every caliper undergoes a 100% pressure test at 1.5x the maximum operating pressure before shipment. We maintain a stock of over 50,000 units in our regional warehouses, ensuring that even urgent orders are shipped within 24 hours. Furthermore, our technical support team—staffed by ASE-certified mechanics—is available to assist with fitment verification and troubleshooting. We do not just sell parts; we deliver solutions that keep your fleet moving safely and efficiently.
7. FAQ
Q: Is this caliper a direct replacement for my 2018 Freightliner Cascadia?
A: Yes, this unit is designed as a direct bolt-on replacement for Freightliner models equipped with Meritor EX225 brakes. Always verify your axle configuration (steer vs. drive) and rotor size before ordering.
Q: Can I use this caliper with a hydraulic brake system?
A: No. This is an air brake caliper designed for pneumatic systems operating at 100-120 psi. It is not compatible with hydraulic master cylinder setups.
Q: What is the warranty period?
A: We offer a 12-month / 100,000-mile warranty against manufacturing defects in materials and workmanship. This does not cover wear items such as brake pads or seals.
Q: Does the caliper come with brake pads?
A: No, this listing is for the caliper assembly only (including piston, seals, and guide pins). Brake pads must be ordered separately. We recommend using a premium ceramic-metallic pad for best performance.
Q: How do I confirm the correct piston size for my application?
A: Measure the diameter of your existing piston using a caliper. If you have a 5.5-inch piston, this unit is correct. For other sizes, please browse our full range of forest city auto parts calipers by vehicle model.
Q: Is this product DOT approved?
A: While the caliper is manufactured to meet DOT standards for air brake systems, it is the installer's responsibility to ensure the entire braking system (including hoses, valves, and chambers) complies with local regulations.
