Sunsong 3404021 Power Steering Return Line Hose Assembly - From Gear

Power Steering Return Hose for Ford and Lincoln

The Sunsong 3404021 power steering return line hose assembly is built for low-pressure, high-temperature return-side service. It is a direct-fit replacement for select 2009 Ford Expedition, F-150, F-250, F-350, and Lincoln Navigator applications from the gear, with rubber hose construction and corrosion-resistant steel tubing where used in the assembly.

Key Features

• Power steering return line hose assembly for return-side fluid routing
• Rubber hose construction for flexible routing and fluid transfer
• Rated for a maximum working pressure of 250 psi
• Built for low-pressure, high-temperature operation
• High-grade steel tubing with zinc electroplating for rust and corrosion resistance
• Precision-engineered fit for the listed 2009 Ford and Lincoln applications
• Cross-references Four Seasons 75191 and Gates 366637 for the same application

Detailed Description

Sunsong 3404021 is a power steering return line hose assembly engineered to restore proper fluid return from the steering gear on select 2009 Ford Expedition, F-150, F-250, F-350, and Lincoln Navigator models. The assembly is designed around exact-fit requirements and uses durable materials selected for return-line duty, including rubber hose and zinc-coated steel tubing for added resistance to humidity, road salt, water, and grime. This part number, 3404021, is a practical OE-style replacement when the original return hose shows age, seepage, or corrosion.

What This Part Helps Address

• Power steering fluid seepage at the return line
• Cracked, hardened, or deteriorated hose material
• Corroded tubing on the steering return circuit
• Restricted or unreliable fluid return from the gear
• Noise or steering feel changes related to a worn return hose assembly

Installation Notes and Tips

Install this hose on the return side from the steering gear for the listed applications only. Verify end connections before installation: End 1 uses an 11 mm flange fitting and End 2 uses a 13.6 mm beaded tube connection. This assembly does not include a bracket or switch port. Confirm routing, clearance, and connection style against the original part before final tightening. Part number 3404021 is listed for 2009 Ford Expedition, 2009 Ford F-150, 2009 Ford F-250, 2009 Ford F-350, and 2009 Lincoln Navigator, all from gear.

Quality Assurance

Sunsong states that its return hoses exceed original equipment performance standards and are built with corrosion-resistant materials for demanding underhood conditions. The assembly is precision engineered for fit and includes the required wear components where applicable to help restore the original hose function.