1503019-Q4931 Hydraulic Retarder Coolant Hose for Heavy Duty Truck JH6 530

1. Product Details

Product Overview: This hydraulic retarder coolant hose is manufactured as a direct OE-equivalent replacement for the original component. It is built to match the OE part number 1503019-Q4931 in size, shape and function, using quality materials and precise production control. Each piece is designed for Heavy Duty Truck vehicles and is checked against the original dimensions and mounting layout, so installation is straightforward and the repaired system returns to normal working condition.

Product Name: Hydraulic Retarder Coolant Hose

OE Number: 1503019-Q4931

Dimensions: Manufactured to the OEM standard size, with correct inner diameter, length and end shapes, formed on OE-matched tooling for direct fitment without modification.

Vehicle Fitment: JH6 530

Quality Assurance: Manufactured under ISO 9001 quality management for heavy-duty truck applications. Each hose is pressure tested and inspected before export packaging. Export-standard carton packaging is used so the part arrives clean and undamaged.

2. Product Parameters

• Part Name: Hydraulic Retarder Coolant Hose
• OE Number: 1503019-Q4931
• Material: Reinforced heat and coolant resistant rubber hose
• Size: OEM standard size, direct fit
• Vehicle Make: Heavy Duty Truck
• Fitment Type: Direct OE replacement, bolt-on installation
• Quantity: 1 piece per order

3. Product Features

Why Replace: The original component wears over time under heat, pressure and chemical exposure. A worn or damaged part causes leaks, noise or poor performance, and can lead to secondary damage in the connected system. Fitting this OE-quality replacement restores the vehicle to proper working condition and protects other components from premature failure. Every order is handled with care, and our team provides responsive support for fitment questions before and after purchase.

• Direct OE replacement coolant hose for the hydraulic retarder system.
• Handles high coolant flow and temperature in heavy-duty braking operation.
• Reinforced construction prevents collapse under system pressure.
• Restores retarder cooling performance for safe downhill braking.
• Resists coolant, heat, oil and ozone for long service life.
• 100% pressure tested before shipment.

4. Compatible Models & Years

• JH6 530

Please confirm your vehicle chassis code and production year before ordering. If the part number matches but the vehicle is not listed, contact us for verification.

Installation Note: Before installation, compare this part with your original component to confirm the shape, size and fixing points are identical. Clean the mating surfaces, use new clamps, gaskets or seals where recommended, and tighten to the vehicle manufacturer specification. If you are not confident carrying out the replacement yourself, we recommend having it fitted by a professional mechanic.

5. FAQ

Q1: What is a retarder hose?
A: It supplies engine coolant to the hydraulic retarder so the retarder can dissipate the heat generated during continuous braking on long downhill sections. For wholesale prices, stock availability or further technical questions, please contact our sales team directly.

Q2: Is this a genuine OEM part?
A: It is an aftermarket OE-equivalent replacement manufactured to the original specification for direct fitment. For wholesale prices, stock availability or further technical questions, please contact our sales team directly.

Q3: Which trucks does this fit?
A: Please confirm the truck model, engine and production year shown in the fitment list, or send us your original part number. For wholesale prices, stock availability or further technical questions, please contact our sales team directly.