Sunsong 3402186 Power Steering Pressure Line Hose Assembly - Pump To Hydroboost

Power Steering Pressure Line for Ford and Mercury

Sunsong 3402186 is a power steering pressure line hose assembly built for select Ford, Mercury, and Lincoln applications with hydroboost. It is engineered for the pump-to-hydroboost route on 1977-1978 Ford LTD, Mercury Grand Marquis, Mercury Marquis, and 1977 Lincoln Continental models listed below.

• Max working pressure: 1,500 psi
• Burst pressure rating: 8,700 psi
• Tensile strength: 1,600 lb
• Hose material: CSM
• End 1 fitting: 5/8 in. male inverted flare
• End 2 fitting: 7/16 in. male O-ring
• Length: 49.5 in. (1257 mm)
• Precision-engineered for exact fitment
• High-pressure tested before leaving the factory

Detailed Product Overview

This Sunsong power steering pressure line hose assembly is built to restore the hydraulic connection between the pump and hydroboost unit. The steel tubing is electroplated with a zinc coating to improve resistance to corrosion and rust from humidity, road salt, water, and grime. For vehicles such as the Ford LTD and Mercury Marquis, the correct hose routing and fitting style are important for maintaining proper steering and brake-assist system operation.

This part cross-references Gates 356790 for the same application.

What This Hose Helps Address

• Pressure loss in the power steering circuit
• Fluid seepage at worn hose fittings
• Corrosion on original steel lines
• Hydroboost assist issues caused by a damaged pressure line
• Noise or inconsistent steering effort related to hose deterioration

Installation Notes and Fitment

Fits 1977-1978 Ford LTD, Pump To Hydroboost, w/ Hydroboost, w/o Skid Control, w/ AC.

Fits 1977-1978 Mercury Grand Marquis, Pump To Hydroboost, w/ Hydroboost, w/o Skid Control, w/ AC.

Fits 1977-1978 Mercury Marquis, Pump To Hydroboost, w/ Hydroboost, w/o Skid Control, w/ AC.

Fits 1977 Lincoln Continental, Pump To Hydroboost, w/ Male Flared Fitting, w/Hydrobooost, w/o Skid Control, w/AC.

Verify the fitting types, hose length, and routing before installation. This assembly does not include a bracket or PS switch port, so confirm your vehicle’s original configuration matches the listed application.

Quality Assurance

Each hose is subjected to a high-pressure quality assurance test before it leaves the factory to help ensure proper operation after installation. Sunsong 3402186 is built to meet demanding pressure requirements for long service life in the steering system.