TRW Automotive AfterMarket PHD347 Brake Hose

Overview of the TRW Automotive AfterMarket PHD347 Brake Hose

The PHD347 brake hose is a high‑performance, flexible component designed to replace or upgrade the hydraulic lines that connect your vehicle’s master cylinder to each wheel’s braking system. Manufactured by TRW, a leader in automotive safety solutions, this hose delivers reliable pressure transmission, superior durability, and consistent performance across a wide range of operating temperatures.

Key Design Features

• Dual‑Layer Construction: The inner layer is made from reinforced rubber that resists abrasion and chemical attack, while the outer layer consists of a braided steel wire jacket that provides exceptional tensile strength and protects against kinking.
• Temperature Resistance: Engineered to operate safely between –40 °C and +120 °C, the hose maintains flexibility in cold climates and withstands high heat generated during heavy braking or towing.
• Pressure Rating: Rated for a maximum operating pressure of 3000 psi (20.7 MPa), ensuring it can handle the demands of modern hydraulic brake systems without risk of rupture.
• Corrosion‑Resistant Finish: The steel braid is coated with a protective layer that resists rust and corrosion, extending service life even in salt‑laden road conditions.
• Pre‑Tensioned Design: Built to maintain optimal tension over time, reducing the likelihood of hose sagging or slack that could compromise braking performance.

Compatibility and Vehicle Applications

The PHD347 is engineered for a broad spectrum of vehicles. It is commonly used in:

• Mitsubishi models such as the Space Star, S40, and other passenger cars.
• Volvo series including V40 and various commercial trucks that require robust brake hoses.
• Other OEM platforms where TRW’s PHD series is specified for high‑performance braking systems.

Because the hose follows standard fittings and dimensions, it can be swapped into most aftermarket or OEM setups with minimal modification. Always verify the exact fitment for your specific vehicle model before installation.

Installation Guidelines

1. Preparation: Drain the brake fluid from the system to prevent contamination and ensure safety during removal of the old hose.
2. Removal: Carefully disconnect the existing hose from both the master cylinder and wheel cylinders, noting any orientation or torque specifications.
3. Installation: Attach the new PHD347 hose to the fittings. Use a calibrated torque wrench to tighten each fitting to the manufacturer’s specified torque value (typically between 10–15 ft‑lb for most applications).
4. Bleeding: After installation, bleed the brake system according to your vehicle’s service manual to eliminate air pockets and restore optimal braking feel.

Maintenance Tips

• Inspect hoses annually for signs of wear such as cracks, bulges, or leaks. Replace immediately if any damage is detected.
• Avoid exposing the hose to extreme heat sources (e.g., hot exhaust manifolds) that could degrade the rubber lining.
• Keep the brake fluid reservoir topped up with fresh, compatible fluid as specified by your vehicle’s manufacturer.
• When storing or transporting vehicles for extended periods, consider adding a small amount of anti‑corrosion additive to the brake fluid to protect internal components.

Performance Benefits

The TRW PHD347 hose offers several tangible advantages:

• Consistent Hydraulic Pressure: The reinforced construction ensures minimal pressure drop, translating into crisp, reliable braking response.
• Long-Term Reliability: Its robust materials and protective coating reduce the frequency of replacements compared to standard hoses.
• Safety Assurance: By maintaining structural integrity under high pressure and temperature extremes, it helps prevent brake failure scenarios.

Technical Specifications Summary

Conclusion

The TRW Automotive AfterMarket PHD347 Brake Hose stands out as a dependable, high‑quality component for any vehicle requiring robust hydraulic braking performance. Its advanced construction, proven durability, and broad compatibility make it an excellent choice for both OEM replacements and aftermarket upgrades. By selecting this hose, automotive technicians and enthusiasts alike can ensure that their braking systems remain safe, responsive, and reliable under all driving conditions.