Sunsong 3401727 Power Steering Pressure Line Hose Assembly

Power Steering Pressure Line for Nissan 720 and D21

Sunsong 3401727 is a power steering pressure line hose assembly built for select Nissan trucks, including the 1983-1986 Nissan 720 and 1986 Nissan D21. It is engineered to meet demanding pressure requirements and restore proper steering fluid transfer in the power steering system.

Key Features

• Max working pressure: 1,500 psi
• Burst pressure rating: 8,700 psi
• Tensile strength: 1,600 lb
• 72.8 in. overall length for the listed applications
• End 1: 5/8 in. female fitting
• End 2: 14 mm male inverted flare fitting
• CSM hose material for fluid resistance and durability
• High-grade steel tubing with zinc electroplating for corrosion resistance
• Precision-engineered to exact fit for the listed Nissan applications

Detailed Description

This Sunsong power steering pressure line hose assembly, part number 3401727, is built for direct replacement on the Nissan 720 and Nissan D21 applications shown in the fitment data. It is manufactured to exceed original equipment performance standards, with pressure capacity and material strength specified for long service life in demanding steering systems. The steel tubing is zinc coated to help resist rust and corrosion from humidity, road salt, water, and grime. Sunsong 3401727 is also engineered to restore wearable components to original condition where applicable, supporting a proper OE-style repair on the power steering pressure line.

This part cross-references Four Seasons 91546 and Gates 369650 for the same application.

What This Part Helps Address

• Power steering fluid leaks from a worn or damaged pressure hose
• Loss of steering assist caused by pressure line failure
• Corrosion-related hose deterioration on older Nissan trucks
• Improper fluid transfer through a fatigued steering line
• Noisy or inconsistent steering operation linked to hose wear

Installation Notes and Tips

Verify the fitting sizes before installation: 5/8 in. female on one end and 14 mm male inverted flare on the other. Confirm hose routing and length against the original line, especially on 1983-1986 Nissan 720 and 1986 Nissan D21 models. Inspect mating components, seals, and mounting points for wear before installing the new pressure line. This hose assembly does not list a bracket or power steering switch port in the provided attributes.

Quality Assurance

Each hose is pressure tested before leaving the factory to help ensure proper operation after installation. Sunsong states that this pressure line is built to exceed original equipment performance standards and uses corrosion-resistant materials for long-term durability.