Sunsong 3402557B Power Steering Pressure Line Hose Assembly

OE-Style Power Steering Pressure Hose

Sunsong 3402557B is a power steering pressure line hose assembly built for direct replacement on select Ford and Lincoln trucks and SUVs. It is engineered for the 2004-2008 Ford F-150, 2004-2008 Ford F-350 Super Duty, and 2006-2008 Lincoln Mark LT with bracket and without a switch port.

Key Features

• Max working pressure rated at 1,500 psi for demanding steering system operation
• Burst pressure rating of 8,700 psi and tensile strength of 1,600 lb
• High-grade steel tubing with zinc electroplating for corrosion and rust resistance
• Precision-engineered to exact fit for the listed Ford F-150, Ford F-350 Super Duty, and Lincoln Mark LT applications
• Includes required brackets and wear components as specified for the application
• High-pressure tested before shipment for installation and operation verification
• End fittings: 14 mm captive O-ring and 16 mm swivel O-ring
• Hose material: CSM; length: 58 in. (1473 mm)

Detailed Description

This Sunsong power steering pressure line hose assembly, part number 3402557B, is built to restore steering fluid transfer on select 2004-2008 Ford F-150, 2004-2008 Ford F-350 Super Duty, and 2006-2008 Lincoln Mark LT models. The hose is engineered around OE-style dimensions and connection points, with a 14 mm captive O-ring on one end and a 16 mm swivel O-ring on the other for the listed applications. Its steel tubing is zinc-coated to resist corrosion from humidity, road salt, water, and grime, while the CSM hose construction supports long-term service in the power steering system. This part cross-references 13402557B for the same application.

What It Helps Solve

• Power steering fluid leaks from a worn or damaged pressure line
• Steering noise caused by pressure loss in the hydraulic circuit
• Hard steering from restricted or failing hose flow
• Corrosion-related hose deterioration on truck and SUV steering systems
• Fitment issues when replacing the original pressure hose on the listed vehicles

Installation Notes and Tips

Compatible With 2004-2008 Ford F-150, w/o Switch Port, w/ Bracket; 2004-2008 Ford F-350 Super Duty, w/o Switch Port, w/ Bracket; and 2006-2008 Lincoln Mark LT, w/o Switch Port, w/ Bracket. Confirm the vehicle does not use a power steering switch port before installation. Inspect mating surfaces, brackets, and seals during replacement, and verify routing matches the original hose path to avoid contact with heat or moving components. Part number 3402557B should be matched to the vehicle’s original hose configuration before installation.

Quality Assurance

Each hose is pressure tested at the factory before it leaves production, helping verify sealing and function prior to installation. Sunsong builds this assembly to exceed original equipment performance standards for pressure capacity and durability, with corrosion-resistant tubing and application-specific engineering for the listed Ford and Lincoln models.