Sunsong 3401728 Power Steering Pressure Line Hose Assembly

Pressure Line Hose for Nissan Steering Repair

Sunsong 3401728 is a power steering pressure line hose assembly built for direct replacement on select Nissan trucks and pickups. It is engineered for the 1986 Nissan 720 Late, 1986 Nissan D21 Late, and 1987-1989 Nissan D21 applications, with the hose routing and end fittings matched to the original steering system.

Key Features

• Power steering pressure line hose assembly for Nissan steering service
• Fits 1986 Nissan 720, Late; 1986 Nissan D21, Late; 1987-1989 Nissan D21
• End 1: 16 mm banjo fitting
• End 2: 14 mm male inverted flare fitting
• 80 in. (2032 mm) hose length
• CSM hose material for pressure-line use
• High-grade steel tubing with zinc electroplating for corrosion resistance
• Pressure tested before shipment

Detailed Description

This Sunsong power steering pressure line hose assembly, part number 3401728, is built to replace the original pressure hose on select Nissan D21 and Nissan 720 steering systems. The assembly uses a 16 mm banjo connection on one end and a 14 mm male inverted flare on the other, with an 80-inch overall length to match the factory routing on the listed applications. Sunsong states that its pressure hoses are built to exceed original equipment performance standards, with a 1,500 psi maximum working pressure, 8,700 psi burst pressure rating, and 1,600 lb tensile strength. The steel tubing is zinc coated to help resist rust and corrosion from humidity, road salt, water, and grime. This part number 3401728 is a direct-fit steering hose solution for Nissan D21 and Nissan 720 Late models where the original pressure line has failed or is leaking.

This part cross-references Gates 369700 for the same application.

Common Problems This Part Can Address

• Power steering fluid leaks from a cracked or worn pressure hose
• Loss of steering assist caused by pressure-line failure
• Noise or stiffness in the steering system related to low fluid pressure
• Corrosion damage on the original steel line
• Fitment issues after replacing a damaged factory hose on Nissan D21 or Nissan 720 Late models

Installation Notes and Tips

Verify the end fittings, hose length, and routing against the original hose before installation. Confirm that the vehicle is one of the listed applications: 1986 Nissan 720 Late, 1986 Nissan D21 Late, or 1987-1989 Nissan D21. Inspect mating surfaces, flare seats, and banjo connection points for wear or damage before assembly. After installation, refill the power steering system and check for leaks with the engine running and the steering turned through its full range.

Quality Assurance

Sunsong pressure hoses are high-pressure tested at the factory before leaving production. The hose assembly is engineered with corrosion-resistant steel tubing and pressure-line construction intended to restore original steering system function on the specified Nissan applications. Part number 3401728 is built to meet demanding steering pressure requirements for long-term service.