Dongfeng xinjiang truck parts Water outlet hose of retarder 1303226-T5M302Y

Built to withstand the intense heat generated by retarders during braking, this hose features a heat-resistant EPDM rubber core that operates reliably across a temperature range of -40℃ to 140℃. It resists softening, cracking, or deformation even when exposed to high-temperature coolant (up to 125℃) during prolonged retarder use (e.g., downhill driving). The hose’s burst pressure rating reaches 1.8MPa—exceeding the retarder cooling system’s maximum working pressure (1.0-1.2MPa)—preventing rupture under pressure spikes. Its multi-layer structure (inner rubber + polyester fiber reinforcement + outer rubber) enhances pressure resistance, ensuring steady coolant flow from the retarder to the radiator. This robust performance is critical for preventing retarder overheating and maintaining braking efficiency

The hose incorporates precision-molded connectors with built-in double sealing lips (shore hardness: 75±5) that form a tight seal with the retarder’s water outlet and radiator inlet. The sealing lips are made of nitrile rubber (NBR) with excellent resistance to coolant and oil, preventing leakage even under vibration from road bumps or retarder operation. Additionally, each connector features a stainless steel clamp groove that securely holds factory clamps, avoiding slippage that could cause leaks. The inner surface of the hose is smooth, reducing coolant flow resistance and preventing sediment accumulation that might compromise sealing. This leak-proof design maintains the system’s pressure and coolant level, preventing retarder damage from overheating

Constructed from high-quality EPDM rubber blended with anti-aging additives, the hose offers superior resistance to coolant, ozone, UV radiation, and road contaminants—avoiding degradation from long-term exposure. The inner rubber layer is formulated to resist swelling or hardening when in contact with ethylene glycol-based coolants (standard in truck cooling systems). The middle reinforcement layer uses high-tensile polyester fiber braid, enhancing tensile strength (≥18MPa) and preventing the hose from expanding under pressure. The outer rubber layer has an anti-abrasion coating, resisting scratches from engine bay components or road debris. These materials ensure the hose’s service life exceeds 60,000 kilometers, reducing replacement frequency and maintenance costs

Designed for user-friendly installation, the hose’s flexible EPDM material allows easy bending to match the retarder and radiator’s spatial layout—no specialized tools or heating are needed. The pre-cut length and 45° elbow connector enable direct alignment with the system’s ports, simplifying the replacement process. Installation steps are straightforward: remove the old hose’s clamps, detach the worn hose, align the new hose’s connectors with the retarder and radiator ports, and re-fasten the clamps to the recommended torque (14N·m). A professional technician can complete the process in under 25 minutes. Maintenance is simple—regular visual checks for cracks, bulges, or leaks are sufficient, as the durable materials resist routine wear. This design minimizes truck downtime, ensuring quick return to service