803380612 XCMG GR2605 motor grader hose assembly

803380612 XCMG GR2605 motor grader hose assembly

The XCMG GR2605 grader 803380612 hose assembly is a key fluid transmission component of the machine’s hydraulic system. Manufactured strictly according to XCMG’s original design standards, GB/T 3683 hydraulic hose assembly technical requirements, and engineering machinery high-pressure hose specifications, it is specifically customized for the GR2605 grader’s hydraulic system (compatible with components such as the blade cylinder and front wheel tilting cylinder). It is perfectly suited for extreme scenarios involving high pressure, severe vibration, and high levels of oil and dust, such as highway construction and maintenance, airport runway grading, open-pit mine stripping, and large-scale water conservancy earthwork filling. As the “fluid transport channel” of the hydraulic system, it is responsible for the stable transmission of high-pressure hydraulic oil, ensuring the precise operation of hydraulic actuators and preventing hydraulic system failures caused by hose rupture, leakage, or aging. It is a high-quality original factory replacement part for GR2605 grader hoses that have aged, cracked, leaked at joints, or lacked sufficient pressure resistance, eliminating the need for assembling from individual parts.

This hose assembly adopts a high-pressure multi-layer composite structure: the hose body uses a three-layer composite design with a synthetic rubber inner tube, a high-strength steel wire braided reinforcement layer, and a weather-resistant outer rubber layer. The inner tube has excellent oil resistance, is compatible with anti-wear hydraulic oil L-HM 46/68, and does not swell or age; the reinforcement layer uses 2-4 layers of high-tensile steel wire braiding, with a breaking strength ≥1800MPa, a rated working pressure ≥40MPa, and a burst pressure ≥120MPa, which can withstand the high-pressure impact of the hydraulic system. The structure is stable under 25g peak vibration conditions with no risk of breakage; the outer rubber layer is weather-resistant and wear-resistant synthetic rubber with a Shore hardness of 65-70HA and a tear strength ≥25kN/m, effectively resisting sand and gravel abrasion, ultraviolet radiation, and harsh environmental corrosion, with a service life ≥8000 hours.

The hose connection system features a leak-proof sealing design: the connectors are precision forged from carbon steel and undergo double anti-corrosion treatment with galvanizing and passivation, achieving a corrosion resistance level meeting the GB/T 10125 500-hour salt spray test standard; the connectors and hoses use a crimp connection with a crimping pressure ≥200MPa and a connection strength ≥15kN, eliminating the risk of loosening or leakage; the connector sealing surface uses a conical surface + O-ring double seal, compatible with the original vehicle hydraulic interface, with a sealing pressure ≥40MPa, ensuring no leakage during long-term high-pressure operation; key components are equipped with wear-resistant protective sleeves to prevent friction and wear between the hose and the machine body, further extending service life. The hose adapter system features flexible adaptability: the hose length is customized according to the original vehicle installation requirements (standard length 500-1500mm optional), the bending radius is ≤150mm, which can adapt to complex installation paths of hydraulic systems without hard bends or dead bends; the hose has an operating temperature range of -40℃ to 120℃, maintaining good flexibility in extreme high and low temperature environments without hardening or cracking; the assembly is equipped with original factory-specific clamps and fixing brackets, ensuring a neat layout after installation and preventing the hose from colliding and rubbing against other components due to vibration during operation.

The product’s connector specifications, hose diameter, and installation length are precisely matched 1:1 to the original hydraulic system of the XCMG GR2605 vehicle. The connector threads conform to SAE standards (M27×2/M30×2 optional), and the hose inner diameter is selectable from 16-25mm. No additional modification or adjustment is required, and it can be directly connected to hydraulic pumps, cylinders, valve assemblies, and other components. The assembly has undergone a pressure resistance test of 1.5 times the rated pressure (60MPa), and showed no leakage or permanent deformation after 30 minutes of pressure holding. The installation torque is ≤30N・m, and a single person can complete the overall disassembly and installation in 20 minutes with special tools. After installation, it perfectly matches the movement trajectory of the hydraulic system and does not affect the coordination of component movements.

This hose assembly has passed multiple authoritative tests and certifications: GB/T 3683 Technical Requirements for Hydraulic Hose Assemblies, 8000-hour fatigue life test (no cracking, no leakage), 500-hour salt spray + UV aging test (no rust on joints, no aging of outer rubber layer), and wide temperature environment test from -40℃ to 120℃ (good flexibility); its sealing performance has passed the hydraulic system static sealing test, with a pressure drop ≤0.3MPa after 24 hours of pressure holding; it meets the safety requirements for hydraulic hoses in ISO 1436 standard.

Core Technical Parameters

Part Model: 803380612
Part Name: Hose Assembly (Complete Set of High-Pressure Hydraulic Transmission Hose)
Applicable Model: XCMG GR2605 motor grader
Compatible Components: GR2605 hydraulic system, blade cylinder, front wheel tilting cylinder, hydraulic valve group, etc.
Material: Synthetic rubber inner tube, high-strength steel wire braided layer, weather-resistant outer rubber layer, carbon steel forged joint, O-ring seal, wear-resistant protective sleeve
Process: Multi-layer composite molding, steel wire braid reinforcement, crimp connection, double anti-corrosion treatment, pressure resistance test calibration
Core Parameters: Rated pressure 40MPa, burst pressure 120MPa, hose inner diameter 16-25mm, length 500-1500mm, bending radius ≤150mm, temperature range -40℃ to 120℃, protection level IP65 Safety Certification: GB/T 3683 Hydraulic Hose Standard, ISO 1436 Safety Standard, SAE Fitting Standard
Features: High-pressure impact resistance, double-seal leak prevention, wear-resistant and anti-aging, flexible adaptation, original factory precise fit
Functions: Stable hydraulic oil transmission, ensures normal operation of the hydraulic system, withstands high-pressure impact and vibration, resists harsh environmental corrosion, adaptable to complex installation paths

Core Advantages

Original factory 1:1 mold customization, direct replacement without modification; multi-layer composite structure + steel wire reinforcement, high-pressure impact resistance and long service life; crimp-type fitting + double seal, completely solves leakage problems; weather-resistant outer rubber layer + protective sleeve, excellent wear resistance and anti-aging performance; flexible bending to adapt to complex paths; convenient installation, significantly shortens downtime maintenance time after hydraulic system failure, ensuring operational efficiency.

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