Power Steering Return Line Hose Assembly

Product Description

A power steering hose is a critical component in vehicle hydraulic steering systems, designed to transport pressurized hydraulic fluid between the power steering pump, steering gear/rack, and reservoir. These flexible yet durable hoses withstand continuous exposure to high pressures (typically 150-1,500 PSI) and extreme temperature fluctuations (-40°F to +300°F).
Constructed with multiple layers, most hoses feature:
A synthetic rubber or thermoplastic inner tube resistant to hydraulic fluid degradation
-Reinforcement layers (braided steel wire, textile mesh, or spiral-wound fibers) for pressure containment
A weather-resistant outer cover (EPDM or CR rubber) to protect against abrasion, ozone, and environmental damage
Two primary types exist:
1. High-Pressure Supply Hoses- Connect the pump to the steering gear, handling peak system pressures.
2. Low-Pressure Return Hoses- Direct excess fluid back to the reservoir under minimal pressure.
Proper maintenance is essential - deteriorated hoses can lead to fluid leaks, pump cavitation, or complete steering failure. Modern vehicles increasingly use electrically assisted steering systems, but hydraulic variants remain prevalent in heavy-duty and legacy vehicles. OEM specifications mandate strict compliance with SAE J188 and ISO 11425 standards for safety and performance.

Parameter name	Parameter Description/Value	Remark	Parameter name	Parameter Description/Value	Remark
Material structure	Inner layer: oil resistant synthetic rubber (e.g. NBR or HNBR) Reinforcement layer: High strength fiber/wire braided layer Cover: wear-resistant, anti-aging rubber or polyurethane	High temperature, high pressure and chemical corrosion resistance	Length	300 mm ~ 1500 mm (customizable)	Installation tolerance ±10 mm
Inside diameter (ID)	8 mm, 10 mm, 12 mm (common range)	Select according to vehicle type	Minimum bending radius	50 mm ~ 100 mm	Avoid over-bending resulting in reduced life
Outside diameter (OD)	14 mm,16 mm,18 mm	Tolerance ± 0.5mm	Joint type	SAE 45° flaring joint, DIN 24° tapered joint, JIS metric thread joint	ADAPTS to steering pump/steering interface
Working pressure	10 MPa ~ 20 MPa (at room temperature)	The peak pressure can reach 30MPa	Compatible fluid	ATF (Automatic transmission oil), PSF (Power steering oil)	Must meet Dexron or ISO 7308 standards
Burst pressure	≥60 MPa	Safety factor ≥3 times the working pressure	Certification standard	ISO 11425, SAE J188, OEM specifications (e.g. VW TL 52406)	Meets the durability test requirements of the automotive industry
Temperature range	-40°C ~ +120°C	Short-time tolerance 135°C	Life cycle	≥5 million pulse tests (pressure cycle)	Simulate 10 years or 200,000 km of service conditions

Qingdao Jinyuan Automobile Tubing Co., LTD., founded in 1989, is a professional company integrating automotive pipe assembly research, development, production, sales and service, with independent development and product design capabilities, the company mainly produces all kinds of brake pipes. Clutch pipe, power steering pipe assembly, oil cooler pipe assembly, fuel pipe assembly and other types of oil, gas pipeline and assembly. Production pipeline related to the automotive industry: Brake system (hydraulic brake hard tube, hydraulic brake hose, pneumatic brake hard tube, pneumatic brake hose, vacuum tube), transmission system (clutch hard tube, clutch hose), steering system (high pressure oil pipe, suction oil pipe, return oil pipe), fuel system (supply and return oil pipe, carbon tank oil pipe), cooling system (cooling water pipe, outlet pipe), Air intake system (air compressor intake pipe, intercooler pipe) and other automotive pipeline systems, mainly for domestic and foreign electric vehicles, motorcycles, light trucks, heavy trucks, car manufacturers supporting, complete production types.
The company is located in the beautiful Qingdao Jiaozhou Bay. The company has a standardized production workshop of 4,000 square meters, with fixed assets of more than 30 million yuan, more than 200 employees, including 20 technical personnel. We not only provide qualified pipeline products, but also provide vehicle pipeline solutions, we are willing to contribute our experience to customers, and meet the technical challenges with new and flexible solutions

Q1.who is JYLEAN?
A: JYLEAN is a professional automotive pipe manufacturer with a history of more than 30 years in the market. We have exported to 10 countries and enjoy a good reputation.
Q2. Can you produce according to sample?
A: Yes, we can produce according to your sample or technical drawing.
Q3. What is your policy sample?
A: Usually the sample is free of charge, but the customer has to pay the shipping fee.
Q4. What are your terms of payment?
A: 30% by telegraphic transfer as deposit and 70% before delivery or against copies of documents.
Q5. What are your delivery terms?
A: FOB, CIF, EXW, CFR, etc.
So far. What's your delivery time?
A: Generally speaking, it takes 45 days. The delivery time depends on the items you order and the quantity.
Q6. Do you inspect all the goods before delivery?
A: Of course. We have 100% visual inspection and performance test before delivery.

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